source string | id string | question string | options list | answer string | reasoning string |
|---|---|---|---|---|---|
OpenBookQA | OpenBookQA-1201 | steel, alloys, metals
Title: Do "non-iron steels" exist? There are numerous steel alloys, containing mostly iron, carbon, and some other metals. Generally speaking, we can think of them as if they were some type of steel.
My question is: do "non-ferrous steels" exist? I am thinking of pure, non-iron metals, containing... | [
"nickel",
"ammonia",
"Na",
"Fe"
] | D | ferrous metals contain iron |
OpenBookQA | OpenBookQA-1202 | That would be a total of 5x30 + 3x40 + 2x60 = 390 plants (with an arbitrary factor that we'll set to 1 without loss of generality).
The amount of highbush is 5x30 = 150.
The amount of lowbush is 3x40 = 120.
The amount of hybrid is 2x60 = 120.
If the opossums didn't care, they would likely eat blueberries in this ratio... | [
"should be ate when they are green",
"keep your brain clean",
"Are only available in Canada",
"Are all very poisonous"
] | B | a berry contains seeds |
OpenBookQA | OpenBookQA-1203 | thermodynamics, statistical-mechanics
Edit 2 I am adding a diagram of the setup. The point is that I start with the setup at 50 °C and 1 atm with water at the bottom and an ideal gas that does not dissolve in water at the top with the two separated by a partition. What will happen when I remove the partition. Will som... | [
"Breaking ice up into pieces.",
"Filling a swimming pool",
"A lake forming a cloud",
"Irrigating a corn crop"
] | C | evaporation is a stage in the water cycle process |
OpenBookQA | OpenBookQA-1204 | zoology, ecology, diet, predation
Cheetahs have been reported to suffer from intraguild competition by lions Panthera leo, spotted hyenas Crocuta crocuta and occasionally leopards Panthera pardus. These larger predators represent a threat to the smaller-bodied cheetahs as they can affect their food intake by limiting ... | [
"wolves and bears eating salmon",
"a shark and marlin swimming fast",
"gazelles and zebras living on the plains",
"an oxpecker helping a rhino"
] | A | if two animals eat the same prey then those animals compete for that pey |
OpenBookQA | OpenBookQA-1205 | entomology
Title: Constantly wiggling moth pupa - will it emerge soon? Today I found a moth pupa in the soil in my garden in western Sweden. It's about 15 mm long.
I have found similar ones before, but this one is wiggling a lot more, even after I put it down and put a bit of dirt over it. It's been moving for more t... | [
"all of these",
"insects are born live",
"pupa stage is sometimes skipped",
"pupa is a required stage"
] | C | incomplete metamorphosis is when an insect reaches the adult stage without being a pupa |
OpenBookQA | OpenBookQA-1206 | electric-circuits, potential, electrical-resistance, conductors
These analogies are not exact and are only intended to give you a better feel as to what is happening.
Hope this helps.
The following is multiple choice question (with options) to answer.
An example of a circuit would be | [
"Rock climbing",
"running a mile",
"dimming a bulb",
"swimming a lap"
] | C | when an electrical circuit is working properly , electrical current runs through the wires in that circuit |
OpenBookQA | OpenBookQA-1207 | forces, classical-mechanics, energy
Title: What's the work done in an object to change its direction? Say, for example an object is moving 2m/s right and some force makes it travel 2m/s left. What would be the work done on this object? It starts and ends with the same kinetic energy, but clearly something had to be do... | [
"seven bees are flying north while a car is driving west",
"a car is driving west with a person pushing it west",
"a car is driving east but the sun is rising in the east",
"a car is driving north with strong winds blowing south"
] | D | a force acting on an object in the opposite direction that the object is moving can cause that object 's speed to decrease in a forward motion |
OpenBookQA | OpenBookQA-1208 | materials
Title: Making Lyophilized Cake Lookalike using household ingredients I'm working on a machine learning model to identify flaws in vaccines in lyophilized cake form. To train the model, I need a number of samples that look something like this:
I have vials, but I'm having trouble making a suitable cake – I n... | [
"it is made into a wetter form",
"it is a liquid lake",
"it becomes molten liquid",
"it is damp inside"
] | A | condensing causes a liquid to form |
OpenBookQA | OpenBookQA-1209 | fluid-dynamics, flow, porous-media
separating
$$ -\frac{\mu_n B_n}{\mu_g B_g} dp=\left[\frac{\mu_n B_n}{k A}q_{sc}+ \frac{c\beta}{\mu_g A^2}\rho_{g,sc} \mu_n B_n q_{sc}^2\right]dx$$
Integrating
$$ -\mu_n B_n \int_{p_1}^{p_2}\frac{1}{\mu_g B_g} dp=\left[\frac{\mu_n B_n}{k A}q_{sc}+ \frac{c\beta}{\mu_g A^2}\rho_{g,sc} \... | [
"is renewable thru more mining",
"depletes without replenishment with every use",
"comes from synthetic creation",
"should be used as much as possible"
] | B | natural gas is a nonrenewable resource |
OpenBookQA | OpenBookQA-1210 | zoology, species-identification, ornithology, behaviour
Title: What is this crow eating, and is it a common part of the corvid diet? Here's a picture (by Rob Curtis) of a crow carrying and eating the corpse of what looks a bit like a small hawk or falcon:
Other pictures clearly show the crow is eating the dead bird. ... | [
"Chicken",
"Lion",
"Cow",
"Buffalo"
] | B | carnivores only eat animals |
OpenBookQA | OpenBookQA-1211 | ecology, behaviour, sociality, predation, community-ecology
Title: How selective are wolves about the size of their prey? For an animal that lives and hunts socially like a wolf, is there a lower threshold to the size of prey items they will hunt? A pack wouldn't have much trouble with catching say a rabbit, but would... | [
"wolves are human",
"wolves elude humanity",
"wolves eat corn",
"wolves are domesticated"
] | B | animals usually distance themselves from humans |
OpenBookQA | OpenBookQA-1212 | photosynthesis
Title: What vegetation would thrive in the Martian atmosphere? Most plants require carbon dioxide for their photosynthesis, which Mars has in overabundance.
Would atmosphere composition (let's ignore temperatures for the purpose of this question) of Mars allow vegetation to grow? This is not my field b... | [
"the ceramic tile in a kitchen",
"a water body front",
"the top of a mountain",
"the bottom of a clay pit"
] | B | a riverbank is made of soil |
OpenBookQA | OpenBookQA-1213 | quantum-mechanics, operators, quantum-information, quantum-computer, linear-algebra
For a given $x\in\mathcal H$, the decomposition in (2) is given by $x = u + v$ where $u = P(x)$ and $v = x-P(x)$. Note that $U=Ran(P)$ and $V=Ker(P)$.
The following is multiple choice question (with options) to answer.
What is decomp... | [
"lifeless life forms",
"living creatures",
"metals",
"plastics"
] | A | decomposition is when a decomposer breaks down dead organisms |
OpenBookQA | OpenBookQA-1214 | evolution, ornithology, palaeontology
One thing those many, many bird and proto-bird fossils also made clear is that the traits of modern birds (feathers, wings, toothless beaks, etc) didn't evolve in a simple line from non-bird to bird. Many of those traits evolved convergently in several lineages, were lost in some,... | [
"getting to hard to reach wood",
"getting to hard to reach females",
"getting to hard to reach rocks",
"getting to hard to reach nutrients"
] | D | sharp beaks are a kind of adaptation for catching prey |
OpenBookQA | OpenBookQA-1215 | zoology
Capybara, rabbits, hamsters and other related species do not have a complex ruminant digestive system. Instead they extract more nutrition from grass by giving their food a second pass through the gut. Soft fecal pellets of partially digested food are excreted and generally consumed immediately. Consuming thes... | [
"herbivores",
"bacteria",
"flesh eaters",
"giraffes"
] | C | predators eat other animals |
OpenBookQA | OpenBookQA-1216 | zoology, microbiology, pathology
Title: Prevention of disease spreading in animal kingdom It's my first question on here, so I'm not sure If my question fits the theme. Please refer me to the appropriate one, If I have made a mistake.
So a question that I wanted to ask has to do with whether or not animals potentially... | [
"piles of discarded diapers",
"freshly off the grill steak",
"flowers that have just bloomed",
"pools of clear, clean water"
] | A | most animals avoid bad odors |
OpenBookQA | OpenBookQA-1217 | metallurgy, nuclear-chemistry, geochemistry
Title: Why are rare earth metals and platinum group metals are often found clustered together in ores Rare earth and platinum group metals are often found clustered together in the earth's crust. Mining for platinum, for instance, also yields Rhodium and Ruthenium belonging ... | [
"Grass",
"Vehicle scraps",
"Wood",
"Glass"
] | B | ferrous metals contain iron |
OpenBookQA | OpenBookQA-1218 | cardiology, health
Title: What shows how healthy someone is by their heart rate? What shows how healthy someone is by their heart rate - how low it is at resting pulse or how low it is during exercise or how large the difference is between the resting rate and rate with load? Any ideas?
Clarification:
Essentially, how... | [
"higher",
"lower",
"normal",
"fluctuating"
] | A | as energy required for an activity increases , pulse will increase |
OpenBookQA | OpenBookQA-1219 | everyday-life
Due to friction effects though, option c is still best. Pedaling hard will quickly deplete energy reserves while pedaling at a slow but steady rate will allow you to cycle for much longer. From a physics point of view, we cannot help you spend less energy, it will inevitable take about the same amount of... | [
"dolphins",
"dogs",
"possessors of thumbs",
"emus"
] | C | a human can pedal a bicycle |
OpenBookQA | OpenBookQA-1220 | waves, electromagnetic-radiation, acoustics, interference, noise
It's two different things that are kind of analogous. I can't say it's impossible but it looks difficult.
The following is multiple choice question (with options) to answer.
if two things seemingly come closer together without a person interfering, whic... | [
"the objects are possessed",
"the objects could have magnetic properties",
"the sun is rising",
"all of these"
] | B | magnetic attraction pulls two objects together |
OpenBookQA | OpenBookQA-1221 | It just turns out nicely for C that he is one of the people whose hat colors D and C both know about.
To introduce a modified challange: if the task were to yell out C's hat color right away, D would know for certain, C would have the increased probability of $2/3$ and A and B would be stuck with the random guess of $... | [
"noticing it",
"visiting it",
"touching it",
"killing it"
] | A | the color of an object can be discovered by looking at that object |
OpenBookQA | OpenBookQA-1222 | fft, filters, audio
Here is some reading for you - I hope it will guide you and you will find appropriate method for your kind of signals.
The following is multiple choice question (with options) to answer.
Sound can be used for communication by | [
"creatures",
"plants",
"water",
"planets"
] | A | sound can be used for communication by animals |
OpenBookQA | OpenBookQA-1223 | marine-biology, molluscs
Title: Age of shells on beach As a child I watched tiny fiddler crabs living in conical shells, and many years later I find that people study fossil turritellids. So now I wonder: how old are shells, typically, that you see on beaches? Do they wear out after a year of sand abrasion? 100 years,... | [
"is now an underground chamber",
"is now solid gold",
"is now about to explode",
"is now much bigger"
] | A | a cavern is formed by carbonic acid in groundwater seeping through rock and dissolving limestone |
OpenBookQA | OpenBookQA-1224 | fusion, renewable-energy
An energy "breakthrough" would be a loaded development. We already use lots of energy, and if we found it economic to use more we probably would. The last breakthrough shift in our ability to exploit energy resources rocketed the entire planet into a new geological era, the Anthropocene. We... | [
"core",
"planet",
"star",
"moon"
] | C | a complete revolution of the Earth around the sun takes one solar year |
OpenBookQA | OpenBookQA-1225 | atmospheric-chemistry
But some researchers have argued it does make a notable contribution in the lower atmosphere, but indirectly. There doesn't appear to be a consensus on how big this effect is (and the Wikipedia reference is old and obsolete). The argument for ozone being a notable contributor is based on the foll... | [
"redeeming aluminum cans",
"burning trash",
"hunting deer",
"Building inground pool"
] | A | recycling has a positive impact on the environment |
OpenBookQA | OpenBookQA-1226 | proteins, food, digestive-system, amino-acids, digestion
Title: How are proteins reused in the body? Part of what we eat are proteins,
and our body is in part build of proteins.
Are the proteins of the body build based on proteins in food at all?
Are proteins in food directly reused in the body,
or are proteins first ... | [
"metals",
"stones",
"plastic food",
"nutriment"
] | D | the breaking down of food into simple substances occurs in the digestive system |
OpenBookQA | OpenBookQA-1227 | general-relativity, spacetime, curvature, tidal-effect
The "therefore" is incorrect.
In the language of Newtonian gravity, tides happen because of a differential gravitational pull between different places on Earth and its center of mass acting as a forcing term for the system of all the bodies of water, whose respons... | [
"on a curved surface",
"full of marine life",
"flowing rapidly with waves",
"in the ocean or lake"
] | A | water flows down a slope |
OpenBookQA | OpenBookQA-1228 | automotive-engineering, car
Title: How do hybrid cars achieve greater fuel efficiency? In this question I’m comparing non-plug-in hybrid fuel/electric vehicles with fuel-only vehicles. Also, I’m not disputing that hybrid cars are more fuel efficient, I’m just trying to understand how.
If I remember two things from hig... | [
"less",
"more",
"more electric",
"slower cars"
] | A | as mileage per galon of gasoline increases , the amount of gasoline used will decrease |
OpenBookQA | OpenBookQA-1229 | magnetic-fields, earth
Title: Would a compass on its side point at the ground? From a point just north of the equator, A straight line to the Magnetic North would be through the earth. If a compass was turned on it's side, would the north pointing arrow point toward the ground along that straight line? A compass is us... | [
"knows orientation",
"Tracks People",
"Cleans",
"Invented in 1905"
] | A | a compass is used to navigate oceans |
OpenBookQA | OpenBookQA-1230 | physical-chemistry, inorganic-chemistry, everyday-chemistry, thermodynamics
Title: Strange observation! Every one have observed that when we pour cool water into a transparent glass (or simply glass), some droplets accumulate on the outside part. Did the droplets come pass through the glass? If they didn't, why is the... | [
"clothes",
"eyes",
"hair",
"skin"
] | D | when the body is hot , sweat is produced to cool the body |
OpenBookQA | OpenBookQA-1231 | fluid-mechanics, thermodynamics, heat-transfer
Water will only condense when moist air is cooled below its dew point. The amount of water the air can store is not important to us in this case; just when it is at the dew point.
This means that in order for this system to produce any water, the night temperature must be... | [
"ice splashes water in my glass",
"a raindrop lands in my eye",
"a moist film is on my spectacles",
"sweat falls into my eyes"
] | C | condensation is a stage in the water cycle process |
OpenBookQA | OpenBookQA-1232 | thermodynamics, perception
Title: Our Perception of Heat Our body temperature is roughly 37 degrees celsius (that is, when we measure our body temperature externally, by using a thermometer that measures the temperature of our skin usually between our arm and side torso), whereas most of us would say that 25 degrees w... | [
"a bird in a tree",
"a snake in a desert",
"a fox in the snow",
"a shark in the water"
] | C | an animal usually requires a warm body temperature for survival |
OpenBookQA | OpenBookQA-1233 | geophysics, climate, rain, nitrogen
Title: Rain Water vs Sprinkler Irrigation During the rainy season, the crops like corn, cotton are found to be growing faster. Studies shows that the thermoelectric fixation of gaseous Nitrogen during rain storm accelerates the plants growth in rainy season.
Can this effect be see... | [
"more overcast days",
"more sunny days",
"less overcast days",
"a dry environment"
] | A | as the amount of rain increases in an environment , available sunlight will decrease in that environment |
OpenBookQA | OpenBookQA-1234 | earth, rotation, temperature
Title: What contributes the most to the seasonal temperature variation? The seasonal temperature is ultimately due to the precession of the Earth around the axis. But what I'm curious about is... is it due more to the side experiencing winter being farther from the sun or is it more due to... | [
"the day after July 4th",
"two days before April 23rd",
"the day after November 30th",
"the day before Halloween"
] | C | December is during the winter in the northern hemisphere |
OpenBookQA | OpenBookQA-1235 | food, decomposition
Title: Worm compost cannot have cooked food I live in the Netherlands and it is getting fashionable to compost with worms. After investigating a few websites I noticed that most websites suggested that I cannot feed the worms leftovers from citrus fruits. This seems logical. I then started noticing... | [
"harvested turnips",
"alive humans",
"sleeping dogs",
"hibernating bears"
] | A | dead organisms decay |
OpenBookQA | OpenBookQA-1236 | evolution, mathematical-models, theoretical-biology, population-dynamics, population-genetics
Title: Effective population size when the population sizes varies from season to season Let's think of a species which has four generations per year and which population size changes from season to season so that the populati... | [
"butterflies blend in with flowers where they exist",
"ducks prefer to sleep in water that has flowering water lilies",
"people prefer to walk through gardens that have a large number of flowering plants",
"planting flowering plants causes bees to gather en masse"
] | D | as the size of a flower increases , the number of pollinators it will attract increases |
OpenBookQA | OpenBookQA-1237 | transform
Originally posted by rohan with karma: 358 on 2013-04-29
This answer was ACCEPTED on the original site
Post score: 2
Original comments
Comment by mharms on 2013-04-29:
Thank you very much, for your rapid help and the provided image. Yes, it is set to /map. I will try changing this tomorrow when I am back to... | [
"an avalanche",
"a deep freeze",
"a glacier",
"an earthquake"
] | D | an earthquake changes Earth 's surface quickly |
OpenBookQA | OpenBookQA-1238 | reaction-mechanism
It is generally said that reactants react so that they can achieve a
lower energy state. Then why does a reversible reaction occur in the
first place?
Good question. Remember that we can always add energy to make an unfavorable reaction proceed. For example, the sodium ion, which is isoelectron... | [
"Temperatures",
"Shapes",
"Colors",
"Substances"
] | D | chemical reactions cause different substances to form |
OpenBookQA | OpenBookQA-1239 | arachnology
Title: Did or do these gigantic spiders really exist in Finland and/or Northern Europe? In the year 2000, the newspapers in a small coastal town of Finland ("Hanko"; current population: ~8k) had some very disturbing reports of a couple who had just moved into a new rental apartment/house in the central par... | [
"camouflage",
"obtaining sustenance",
"home",
"decoration"
] | B | a spider web is used to capture food by spiders |
OpenBookQA | OpenBookQA-1240 | geology, geophysics, climate-change, carbon-cycle
We can see here in white numbers the most significant pre-industrial sources and sinks (at ~1000 years time scales). We can see that humans produce 9 Gigatons of carbon per year (GtC/yr), due to that extra inflow, photosynthesis is taking 3 GtC/yr more than before, and... | [
"joy",
"natural resources",
"humanity",
"intellegence"
] | B | nature is the source of natural resources |
OpenBookQA | OpenBookQA-1241 | equipment, history-of-chemistry
Title: Help me identify this glassware! I'm a freshly graduated physics and math teacher moved into a small school from the late 1920s. The equipment here is old and confusing, at the very least. I have found many things which I have never seen before. I would like some help identify... | [
"a plastic fork",
"a paper towel",
"a shipping box",
"a menstrual cup"
] | D | An example of conservation is avoiding waste |
OpenBookQA | OpenBookQA-1242 | the-moon, moon-phases
Title: Red cresent moon Yesterday night i witnessed something very strange when i looked outside the window. I saw the moon (crescent) but it was dull red and right on the horizon ,which is strange considering that it is usually on the upper right of the night sky and white in colour. On further ... | [
"has seven great lakes",
"is devoid of seas",
"is larger than the Earth",
"has a powerful magnetic field"
] | B | the moon does not contain water |
OpenBookQA | OpenBookQA-1243 | thermodynamics, thermal-conduction, thermal-insulation
Compress the fleece thinner so there is less air volume. The acrylic will conduct better than the captured air.
Replace the air with a more conductive fluid like water, or oil, or thermal grease containing conductive metal powder.
Instead of using acrylic polymer ... | [
"aluminum",
"copper",
"thermal underwear",
"steel"
] | C | metal is a thermal conductor |
OpenBookQA | OpenBookQA-1244 | newtonian-mechanics, forces, rotational-dynamics, friction, free-body-diagram
Title: How does friction stop a car? I'm unable to understand how friction causes motion in cars and also is responsible for stopping them.
When it starts the impending motion of tyres is in the backward direction that's why friction is in t... | [
"the tires are being halted by pressure",
"the streets are bumpy",
"the roads have friction",
"the tires are unable to create friction"
] | A | friction is used for stopping a vehicle by brakes |
OpenBookQA | OpenBookQA-1245 | human-biology, eyes, vision
When combined with our Rod sensitivity, though, Green wavelengths produce nearly double the sensitivity the Red Wavelengths - and nearly quadruple the Blue wavelengths. What that means is that in low-light situations when the Cones are unable to produce a precise color image, your Rods will... | [
"The Alps",
"Antarctica",
"Redwood National Park",
"The Pacific"
] | C | a forest environment is often green in color |
OpenBookQA | OpenBookQA-1246 | earthquakes, seismology
Title: Do planetary alignments affect Earth's seismic activity? There is a widely circulated tweet by Frank Hoogerbeets where it seems he has predicted Turkey's earthquake a few days before. The tweet says:
Sooner or later there will be a ~M 7.5 #earthquake in this region (South-Central Turkey... | [
"errostion",
"techtonics",
"volcanic activity",
"fire"
] | B | a tectonic plate moves along a fault line |
OpenBookQA | OpenBookQA-1247 | astronomy, everyday-life, popular-science, climate-science
It is for much the same reason that Winter is colder than Autumn, even though they have the same amount of daylight hours.
The following is multiple choice question (with options) to answer.
The northern hemisphere experiences winter | [
"the month after March",
"the month after November",
"the month after August",
"the month after June"
] | B | January is during the winter in the northern hemisphere |
OpenBookQA | OpenBookQA-1248 | geophysics, sedimentology
Title: Does dirt compact itself over time? If so, how does this happen? If I were to bury something 10 feet (~3 metres) underground, with loose soil on top, would the ground naturally compact itself over time, until whatever I had buried has dirt tightly pressing against it on all sides?
What... | [
"circular",
"grooved",
"hydration",
"folding"
] | B | soil loss causes grooves in soil |
OpenBookQA | OpenBookQA-1249 | forces, newtonian-gravity
Therefore, the conclusion is very intuitive: in order to lift a body of mass $m$ from the ground, one must provide an external force $F_E\ge m g$.
The following is multiple choice question (with options) to answer.
What causes objects that have mass to be pulled down? | [
"planetary pull",
"wind",
"water force",
"weight"
] | A | gravitational force causes objects that have mass to be pulled down on a planet |
OpenBookQA | OpenBookQA-1250 | evolution, zoology, adaptation
One answer that came to mind is domestic animals - the horse and dog in prehistory, the cat in ancient Egypt, etc. That seems too obvious on one hand, and on the other hand may not really be an answer, as there seems to be no indication that pre-domestic animals were endangered by humans... | [
"deer are hunted to keep population levels in check",
"birds fly south for the winter",
"deer relocate in order to find better food",
"hawks hunt all of the mice from a field"
] | D | endangered means low in population |
OpenBookQA | OpenBookQA-1251 | zoology
Capybara, rabbits, hamsters and other related species do not have a complex ruminant digestive system. Instead they extract more nutrition from grass by giving their food a second pass through the gut. Soft fecal pellets of partially digested food are excreted and generally consumed immediately. Consuming thes... | [
"aroma",
"neon signs",
"constellations",
"mating calls"
] | A | smell is used for finding food by some animals |
OpenBookQA | OpenBookQA-1252 | trees, forestry
Title: Why do some trees hold their leaves through fall and winter? Why do some species of oak (Quercus spp.) retain their leaves through fall and winter? I've found that these leaves are called marcescent leaves. There must be some benefit that the tree gains from this because it seems like it would ... | [
"lose water",
"lose acorns",
"lose bark",
"lose energy"
] | D | a leaf performs photosynthesis |
OpenBookQA | OpenBookQA-1253 | mechanical-engineering, power-electronics
Title: How to choose an electronic connector/cable that works in a vibrating environment? We are designing a diagnostic electronic tool for a vibrating table.
In our PCB there are a gyroscope, an accelerometer and a bluetooth module.
Our PCB is attached to a vibrating table th... | [
"ruin the electronics completely",
"keep electricity moving quickly",
"keep electricity from moving as quickly",
"stop the electronics from ever working"
] | C | an electrical insulator slows the transfer of electricity |
OpenBookQA | OpenBookQA-1254 | pressure, fluid-statics
For example, suppose the water level is 5cm below the tops of the tube on both sides and 15cm above the bottom of the connecting tube. If you lower the reservoir (right side) by 10cm, the water level is lowered by 5cm. Relative to the tops of the tube, the water rises on the right by 5cm (so i... | [
"summer",
"fall",
"winter",
"spring"
] | C | transpiration usually happens in the leaves of a plant |
OpenBookQA | OpenBookQA-1255 | botany
Title: Do any plants exhibit hormonal changes similar to puberty? Just what the title states.
Are there any plants/trees that exhibit a growth spurt at a definite interval after the shoot appears? In flowering plants (the angiosperms) there are several developmental transitions in the life of the plant. I won... | [
"more bees visit the flowers surrounding it",
"more honey makers will be drawn to the flower",
"the flower blooms anew",
"birds will eat the flower"
] | B | as the size of a flower increases , the number of pollinators it will attract increases |
OpenBookQA | OpenBookQA-1256 | atmosphere, climate-change, thermodynamics, radiative-transfer
All of which have a compounding effect in the regional and to a lesser degree, global environment, that Chen et al. attribute to as being a cause of a 1-2K temperature rise in high altitude areas in Eurasia and North America and as a disrupting influence i... | [
"gasses with pollution",
"acid rain",
"nuclear war",
"melting ice caps"
] | A | as the amount of polluting gasses in the atmoshere increases , the atmospheric temperature will increase |
OpenBookQA | OpenBookQA-1257 | organic-chemistry, physical-chemistry, biochemistry, alcohols
Title: Storage of Urine Not all may be favorable to this project, but I will explain what I am trying to do. I work at home, and instead of walking a moderate distance to the bathroom and loosing my focus, I've been, at times, peeing in a 3 Quart Poland Spr... | [
"Never move from my chair",
"Never talk to anyone",
"Eat burgers almost everyday",
"Make sure to get some shut lids"
] | D | a human requires rest to be healthy |
OpenBookQA | OpenBookQA-1258 | The above example has other implications. For example, what would happen if the disk hit very close to the nail? Obviously, a force would be exerted on the nail in the forward direction. So, when the stick is struck at the end farthest from the nail, a backward force is exerted on the nail, and when it is hit at the en... | [
"they light up",
"they fall apart",
"the insides quake",
"they burn"
] | C | tapping two objects together causes the particles in those objects to vibrate |
OpenBookQA | OpenBookQA-1259 | I solved it this way, any suggestions always welcome
c/b > 3/80 ( from question)
5/b > 3 / 80
(80 x 5 / 3) > b
This reduces to
133.3333 > b
So the number of burgers have to be less than 133.33 & as u dont get 0.33 burger in Mc Donalds Max burgers is 133
Give me a Big Kudoos Meal Combo if this helps
______________... | [
"a sawmill",
"a planter",
"a school",
"a cow"
] | B | plants are the source of spices |
OpenBookQA | OpenBookQA-1260 | the-sun, space, stellar-atmospheres
However, when you have something the Sun or even fog, the optical depth varies with the distance you're looking into that object. I'll talk about fog since it's familiar, but the same idea applies to the Sun's atmosphere. Say you're standing in a forrest and its very foggy out. Ther... | [
"mountains",
"oceans",
"clouds",
"lower areas"
] | D | large trees block sunlight from reaching the ground |
OpenBookQA | OpenBookQA-1261 | zoology
Capybara, rabbits, hamsters and other related species do not have a complex ruminant digestive system. Instead they extract more nutrition from grass by giving their food a second pass through the gut. Soft fecal pellets of partially digested food are excreted and generally consumed immediately. Consuming thes... | [
"eat other deer",
"consume boulders",
"consume cubs",
"consume dandelions"
] | D | eating food is used to get nutrients by living things |
OpenBookQA | OpenBookQA-1262 | entomology
Title: Constantly wiggling moth pupa - will it emerge soon? Today I found a moth pupa in the soil in my garden in western Sweden. It's about 15 mm long.
I have found similar ones before, but this one is wiggling a lot more, even after I put it down and put a bit of dirt over it. It's been moving for more t... | [
"Use wet towels",
"never happen",
"go into sand",
"Eat candy"
] | C | the cocoons being created occurs during the the pupa stage in a life cycle |
OpenBookQA | OpenBookQA-1263 | hydrology, rivers, dams
Title: Do dams reduce the flow of river downstream? There is a conflict between Egypt and Ethiopia, because the latter wants to build a dam on the Nile river. Citing this article:
[Egypt] fears the Nile dam will reduce its share of the river and leave the
country with dwindling options as it... | [
"metals",
"H2O body",
"fires",
"mountains"
] | B | damming a river can cause a lake to form |
OpenBookQA | OpenBookQA-1264 | evolution, species
Title: Reasons why living fossils exist?
A living fossil is a living species (or clade) that
appears to be similar to another species otherwise known only from fossils,
typically with no close living relatives.
A living fossil is considered as a successful organism, which has made its way thro... | [
"toy",
"live",
"programmed",
"wiped out"
] | D | An example of a fossil is the bones of an extinct animal |
OpenBookQA | OpenBookQA-1265 | geology, geomorphology, coastal
Title: What causes such a narrow slit in a cliff? (see photo)
I have this photo as a background image and I often wonder how such a narrow, well-defined slit could be formed. Is it natural or man-made? If natural, what processes could have formed it? The rest of the coastline is rugged... | [
"animals",
"lifeless matter",
"air flow",
"companies"
] | B | all minerals are formed by natural geological processes |
OpenBookQA | OpenBookQA-1266 | adaptation
Title: How do longleaf pine trees adapt to the florida keys rainforest? I know that longleaf pine trees can be found in rainforests, but I can't find anything. This is sort of a too broad question but here are a few ideas. The second most fragile part of plants are the leaves. In the latitudes and elevati... | [
"new laws",
"lack of light",
"new poetry",
"loud music"
] | B | changes in an environment cause plants to adapt to survive |
OpenBookQA | OpenBookQA-1267 | reinforcement-learning, ai-design, control-theory
Without any proximity reward, you will rely on the wolf literally bumping into the rabbit through random behaviour, before it will have any data example that getting the vector between itself and the rabbit close to (0,0) is a good thing. You may need to have a relativ... | [
"wolves love people",
"wolves carry people",
"wolves evade people",
"wolves smoke people"
] | C | animals usually distance themselves from humans |
OpenBookQA | OpenBookQA-1268 | ecology, behaviour, sociality, predation, community-ecology
Title: How selective are wolves about the size of their prey? For an animal that lives and hunts socially like a wolf, is there a lower threshold to the size of prey items they will hunt? A pack wouldn't have much trouble with catching say a rabbit, but would... | [
"space",
"ocean",
"desert",
"timberland"
] | D | a deer lives in a forest |
OpenBookQA | OpenBookQA-1269 | meteorology, atmosphere, temperature
So, the temperature is falling over night after the sunset, but rises again after the sunrise. Thus, the temperature is at its lowest point in the morning.
Appendix for all you loving calculations:
Note: Simplified to toy model, no atmosphere
The cooling rate of the Earth is appro... | [
"wearing thick coats",
"ice fishing",
"wearing swimsuits",
"adding blankets"
] | C | June is during the winter in the southern hemisphere |
OpenBookQA | OpenBookQA-1270 | geomorphology
Title: What causes these mound-like ground formations? Whilst riding on Mam Tor in Castleton, England I came across this scene (not my photo) and I would like to know what causes the formations which I have ringed in red. They look like piles of earth have been deposited a long time ago, but clearly that... | [
"depressed",
"rock hard",
"greener",
"unstable"
] | D | storms can cause a landslide |
OpenBookQA | OpenBookQA-1271 | python, game
def check_win_diagonal(self):
"""
Returns a boolean indicating whether or not a diagonal win has occurred.
"""
ltr_diag = []
rtl_diag = []
i, j = 0, 3
for row in self.board:
ltr_diag += [row[i]]
rtl_diag += [row[j]]
... | [
"melts it",
"drops it",
"burns it",
"yanks it"
] | D | a magnet attracts magnetic metals through magnetism |
OpenBookQA | OpenBookQA-1272 | electric-circuits, electricity, electric-current
Title: AC Current and Forward Movement Okay - maybe not the most advanced question, but one I have not seen a satisfactory answer to.
DC current is easy to understand. The current and electronics flow unidirectional, and you can understand how by connecting a circuit, ... | [
"Steady",
"fully complete",
"Turned on",
"Charged"
] | B | when an electrical conductor is plugged into an outlet , a circuit is completed |
OpenBookQA | OpenBookQA-1273 | # Thread: physics tourist & bear problem
1. ## physics tourist & bear problem
another easy one i think:
A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 3.5 m/s. The car is a distance d away. The bear is 27 m behind the tourist and running at 6.0 m/s. The tourist rea... | [
"become a mop",
"showoff",
"clean the ice",
"thrive"
] | D | an animal requires warmth for survival |
OpenBookQA | OpenBookQA-1274 | water-resources, energy, renewable-energy, energy-storage
Title: Why do pumped storage hydroelectric facilities use bent pipes? When a reservoir is used to store water for electricity, it's pipes are usually laid in several segments on the ground to reach its source, such as a lake. It seems that if the pipes went dir... | [
"a lily",
"a door",
"a table",
"a rock"
] | A | a plant stem contains a system of tubes for transporting water and nutrients to other parts of the plant |
OpenBookQA | OpenBookQA-1275 | acoustics, everyday-life
Title: What is the "wha" sound when you cover, uncover quickly your mouth,ears, or a speaker? I guess does it cause a doppler effect to sound? I have no idea what's going on These may not be just one thing.
If you uncover your ear you are almost certainly physically deforming your ear and crea... | [
"dead leaves fell down",
"a mouse ran away",
"a duck started quacking",
"a dog was barking"
] | A | if a leaf falls off of a tree then that leaf is dead |
OpenBookQA | OpenBookQA-1276 | entomology, habitat
Title: Do hornets return to the same nest after winter each year? I have what I think is a hornet nest on the soffit of my house.
The nest has been removed, however, the hornets keep rebuilding. Also, they have started to swarm the sewer vent pipe (not shown in photo).
If fail to get rid of the ho... | [
"sleep years",
"sleep softly",
"sleep extensive periods",
"sleep painfully"
] | C | hibernation is an inherited behavior |
OpenBookQA | OpenBookQA-1277 | genetics, dna, chromosome, biotechnology, allele
Title: Do we come to know which allele is dominant by seeing family genration tree only? I know that a Gene has Alleles (variation) and one is Dominant over Other i.e the Other Recessive.
Then I got a Thought that How can we tell whether an Allele is Dominant or Recessi... | [
"either are missing",
"both are missing",
"both are present",
"the recessives present"
] | C | when both a dominant and recessive gene are present , the dominant trait will be visible |
OpenBookQA | OpenBookQA-1278 | A. 1
B. 2
C. 4
D. 5
E. 6
The trap: leftover jugs and/or empty spaces in one carton.
(1) Focus first on total number of jugs carried
Ignore the "7 jugs per carton" for now. It's crazy-making.
Instead, start by finding the total number of jugs carried by the worker in 17 trips
(4 jugs per trip) * (17 trips) = 68 jug... | [
"cloth satchel",
"greedy nature",
"one-use paper bags",
"disposable plastic bag"
] | A | An example of avoiding waste is using an object more than once |
OpenBookQA | OpenBookQA-1279 | geology
Title: Where do riverbed stones come from? Have they always been here since the river was formed? Are some newer than others? Riverbed 'stones' - I assume you mean things like pebbles, boulders, etc. are pieces of rock that have weathered out and been deposited in the river. Some come from rock that is very... | [
"a millennia",
"a week",
"a day",
"a fortnight"
] | A | weathering usually occurs over a period of many years |
OpenBookQA | OpenBookQA-1280 | c++, object-oriented, classes
}
std::cout << std::endl;
}
}
str Chess2::push(int row, int col, int desrow, int descol) {
using std::to_string;
str mystr = to_string(row) + to_string(col) + to_string(desrow) + to_string(descol);
return mystr;
}
str Chess2::computer_move(unsigned short int dep... | [
"wind",
"water",
"heavy exertion",
"flowers"
] | C | pushing an object requires force |
OpenBookQA | OpenBookQA-1281 | metabolism, ecology, photosynthesis
Title: Why isn't phosphorus or nitrogen a limiting nutrient for animals? Nitrogen and Phosphorus are usually the limiting nutrient for plants, especially for algae. Phosphorus is used for DNA, ATP and phospholipids, and Nitrogen is used for pretty much every protein a cell might wa... | [
"water",
"whales",
"stars",
"plastids"
] | B | nutrients are a source of energy for living things |
OpenBookQA | OpenBookQA-1282 | zoology, physiology, brain, ethology, behaviour
Robins, A., Lippolis, G., Bisazza, A., Vallortigara, G. & Rogers, L. J. (1998). Lateralized agonistic responses and hindlimb use in toads. Animal Behaviour, 56, 875–881.
Rogers, L. J. & Andrew, R. J. (Eds) (2002). Comparative Vertebrate Lateralization. Cambridge: Cambr... | [
"receive short radio pulses",
"hold up their sunglasses",
"create lift for flight",
"attract a potential mate"
] | A | bats can echolocate |
OpenBookQA | OpenBookQA-1283 | geology, geophysics, climate-change, carbon-cycle
We can see here in white numbers the most significant pre-industrial sources and sinks (at ~1000 years time scales). We can see that humans produce 9 Gigatons of carbon per year (GtC/yr), due to that extra inflow, photosynthesis is taking 3 GtC/yr more than before, and... | [
"they may be more bountiful",
"they may be more frequent",
"they may cease existing",
"they may be free"
] | C | fossil fuels are a nonrenewable resource |
OpenBookQA | OpenBookQA-1284 | atmospheric-chemistry
But some researchers have argued it does make a notable contribution in the lower atmosphere, but indirectly. There doesn't appear to be a consensus on how big this effect is (and the Wikipedia reference is old and obsolete). The argument for ozone being a notable contributor is based on the foll... | [
"plastic",
"poison",
"trees",
"smoke"
] | C | pollution is a source of pollutants |
OpenBookQA | OpenBookQA-1285 | species-identification, entomology
Title: Big Bug from Peru I'd like to have a name for this guy. There were 5 or 6 of them zipping around the flower bed on the coast of Peru about 120 kms south of Lima. That is a hawkmoth, probably Hyles annei (Guerin-Meneville, 1839). It is one of a number of moth species commonly ... | [
"bills",
"wings",
"hands",
"feet"
] | A | a skinny beak is used for obtaining food by a bird from small spaces |
OpenBookQA | OpenBookQA-1286 | home-experiment, oxidation-state
Title: the perfect campfire As far as chemistry goes, there are laws or observations that can be useful to determine the perfect shape and disposition of the wood in a campfire ?
For example what chemistry says about the 2 most popular "shapes"
teepee
log cabin
or even other varia... | [
"dinner",
"fusion",
"maillard reaction",
"competition"
] | C | cooking causes a chemical reaction |
OpenBookQA | OpenBookQA-1287 | gene-expression
Title: How does a gene "know" what to change to? Excuse my ignorance but I've always been curious about this...
For example, a frog is red, but it starts living in a green forest. Over time the frog becomes green to camouflage. But a gene can't see and I'm sure there's no mechanism for color info to be... | [
"Give a young goat hair that looks like its mother's hair",
"Make a baby chubby",
"Make a horse break its leg",
"Attack viruses and bacteria"
] | A | genes are a vehicle for passing inherited characteristics from parent to offspring |
OpenBookQA | OpenBookQA-1288 | \begin{align} \dbinom{6}{2} & \longleftrightarrow \dbinom{6}{6-2} \\[8pt] AB & \longleftrightarrow CDEF \\ AC & \longleftrightarrow BDEF \\ AD & \longleftrightarrow BCEF \\ AE & \longleftrightarrow BCDF \\ AF & \longleftrightarrow BCDE \\ BC & \longleftrightarrow ADEF \\ BD & \longleftrightarrow ACEF \\ BE & \longleftr... | [
"need to play games",
"bedtime coming sooner than thought",
"lack of food preservation",
"exhaustion from the sun"
] | C | microorganisms cause food to spoil |
OpenBookQA | OpenBookQA-1289 | newtonian-mechanics, energy, friction, everyday-life
the main issue is friction and friction forces, which become torques
because of the structure of the devices considered;
talking of torque would necessarily require the description to
introduce size considerations (wheel and brakes radius), which
would complicate th... | [
"think very hard until you figure it out",
"ask the person who invented it",
"throw it in a lake and see if it floats",
"break it down and determine what it is composed of"
] | D | the composition of something can be used to identify that something |
OpenBookQA | OpenBookQA-1290 | = ",Count[Drop[branches,gen],_Real,\[Infinity]]/4" "" ""Length = ",SetAccuracy[Count[Drop[branches,gen],_Real,\[Infinity]]/4*(Norm[{{pt1[[1]],0.5},{0,0}}]^gen),3]}],18],Gray],{2.3,-1.8}]},{Inset[Style[Text@TraditionalForm@Style[Row[{"Polynomial Trees by Bernat Espigulé"}],18],Gray, Opacity[0.4]],{2.3,-2}]}},P... | [
"build a human",
"build a bench",
"build a car",
"build a computer"
] | B | trees are a renewable resource |
OpenBookQA | OpenBookQA-1291 | thermodynamics, visible-light, lenses
I forgot to mention that you can't heat the sample beyond about $5500\,K$ (which is the temperature of a black body that best fits the spectrum we receive at sea level). Of course, you need to know what you're doing to get anywhere close to this temperature.
The following is mult... | [
"an ice cube",
"a fan",
"holding hands",
"a snowflake"
] | C | a radiator is a source of heat |
OpenBookQA | OpenBookQA-1292 | metabolism, ecology, photosynthesis
Title: Why isn't phosphorus or nitrogen a limiting nutrient for animals? Nitrogen and Phosphorus are usually the limiting nutrient for plants, especially for algae. Phosphorus is used for DNA, ATP and phospholipids, and Nitrogen is used for pretty much every protein a cell might wa... | [
"dirt cheap",
"wind",
"ground minerals",
"soiled clothes"
] | C | soil contains nutrients for plants |
OpenBookQA | OpenBookQA-1293 | optics, visible-light, quantum-electrodynamics, reflection
Title: Is the glass made up of holes that let the light to go through it? The following passage has been extracted from the book "The Magic of Science-A.Frederick Collins" (1917):
Substances of all kinds
have pores or holes in them. A sponge has pores tha... | [
"solid wood",
"glass",
"atmospheres",
"water"
] | A | no light shines through an opaque object |
OpenBookQA | OpenBookQA-1294 | plate-tectonics, rivers, paleogeography, coastal, mountain-building
As to the second question, your mention of the closure of the Tethyan Ocean leading to the Indian-Tibetan collision suggests that you already suspect (correctly) that the Ganges is a case in point. It's headwaters were originally in southwestern Chi... | [
"massive canyons",
"large bricks",
"old socks",
"small creeks"
] | A | most canyons are formed by flowing rivers through erosion over long periods of time |
OpenBookQA | OpenBookQA-1295 | dna, cloning, dna-isolation
If you do this, regular freezers are not cold enough to prevent freezer burn. This is what happens when you put a steak in to the freezer, wrapped in plastic even it will shrivel up and start to dry out as the water in the ice starts to sublime out of the package (the dry air in the freeze... | [
"cause it to die",
"cause it to unfreeze",
"cause it to freeze",
"cause it to corrode"
] | B | moving an object from a cool place to a warm place causes the object 's temperature to increase |
OpenBookQA | OpenBookQA-1296 | newtonian-mechanics, collision
1 - This answer is considering a system where the surface of the floor doesn't deform itself. If there's a trampoline instead of the floor and an object won't stick to it once it falls on it, it will bounce back. If there's sand instead of hard surface, any object falling in sand would b... | [
"slower",
"speedier",
"greater",
"faster"
] | A | as the roughness of something increases , the friction of that something will increase when its surface moves against another surface |
OpenBookQA | OpenBookQA-1297 | human-biology, mammals, lifespan, dogs, rodents
Gigantism:
Whilst the life expectancy for a species may be higher in general people with gigantism may live shorter lives than possible because of non-metabolic related reasons. For example many forms of gigantism are linked to hormones which promote cell division and g... | [
"get fatter",
"run",
"fly",
"die"
] | A | as the amount of food an animal eats increases , the weight of that animal will increase |
OpenBookQA | OpenBookQA-1298 | everyday-life, velocity, flow
Title: When passed, why does my car 'rock' on the highway when I'm stopped, but not when I'm moving? I am the blue car in this scenario. If I am stopped on the highway and am passed by a car going fast (about 65 mph), I feel my car rock in the left/right direction. I think I understand wh... | [
"to evade a polar bear",
"to evade a coyote",
"to dodge a tsunami",
"to outrun an avalanche"
] | B | some animals move quickly to escape predators |
OpenBookQA | OpenBookQA-1299 | general-relativity, cosmology
Annihilation of "dark photons" back into "our world" particles.
Scattering of "dark photons" off "our world" particle.
So your "dark photons" are not so dark in the end...
The following is multiple choice question (with options) to answer.
When you exit a dark film theater, the world | [
"looks darker",
"looks brighter",
"looks the same",
"looks more French"
] | B | when light enters the eye through the pupil , that light falls on the retina |
OpenBookQA | OpenBookQA-1300 | • Rotterdam apartments for students.
• Injury waiver form.
• Belgian Shepherd for sale Adelaide.
• Yugioh Card search.
• Vincenzo cast Instagram.
• The Grand Hotel entertainment.
• Biosphere 2 Discount Tickets.
• Disco Biscuits sessions.
• Is caviar good for Weight Loss.
• Frosted LED globe bulbs cool white.
• Human fa... | [
"keep it outside lacking protection",
"play with it affectionately",
"feed it quality food",
"give it clean water"
] | A | an animal requires shelter |
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