Question: I read this background article the other day: The Table above includes the ideal mechanical advantage of each class of lever. The mechanical advantage is the factor by which a machine changes the input force. The ideal mechanical advantage is the increase or decrease in force that would occur if there were no friction to overcome in the use of the machine. Because all machines must overcome some friction, the ideal mechanical advantage is always somewhat greater than the actual mechanical advantage of the machine as it is used in the real world. I am facing a new situation today: James lives out on the country, He wants to gather some water from a well out from behind his house. When he gets there he realizes that the wheel on the lever that pulls up the bucket is rusted which adds more friction. He decides to oil the wheel to reduce the friction. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Will the input force required to get the lever James is using increase or decrease when he oils it?
Answer: decrease
[Q]: I read this background article the other day: Allergy symptoms can range from mild to severe. Mild symptoms might include itchy eyes, sneezing, and a runny nose. Severe symptoms can cause difficulty breathing, which may be life threatening. Keep in mind that it is the immune system and not the allergen that causes the allergy symptoms. Allergy symptoms can be treated with medications such as antihistamines. Severe allergic reactions may require an injection of the hormone epinephrine. These treatments lessen or counter the immune system's response. I am facing a new situation today: Two sisters both had allergies. Ann had mild allergies, while Jo had to be very careful because she experienced severe allergic reactions before. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which sister didn't have difficulty breathing because of the allergic reactions?
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[A]: Ann
input: Please answer the following: I read this background article the other day: Saturated hydrocarbons are given the general name of alkanes . The name of specific alkanes always ends in - ane . The first part of the name indicates how many carbon atoms each molecule of the alkane has. The smallest alkane is methane. It has just one carbon atom. The next largest is ethane, with two carbon atoms. The chemical formulas and properties of methane, ethane, and several other alkanes are listed in Table below . The boiling and melting points of alkanes are determined mainly by the number of carbon atoms they have. Alkanes with more carbon atoms generally have higher boiling and melting points. I am facing a new situation today: Beth and Jane studied chemistry in school. However, Beth studied noble gasses while Jane decided to know more about alkanes. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which student learned more about the smallest alkane?
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output: Jane
Please answer this: I read this background article the other day: Plants called epiphytes grow on other plants. They obtain moisture from the air and make food by photosynthesis. Most epiphytes are ferns or orchids that live in tropical or temperate rainforests (see Figure below ). Host trees provide support, allowing epiphyte plants to obtain air and sunlight high above the forest floor. Being elevated above the ground lets epiphytes get out of the shadows on the forest floor so they can get enough sunlight for photosynthesis. Being elevated may also reduce the risk of being eaten by herbivores and increase the chance of pollination by wind. I am facing a new situation today: While hiking Bob likes to collect plant specimens. Yesterday, he was hiking along a creek, and was specifically looking for epiphytes. Eventually, he found one, and tagged the specimen as specimen A. To compare specimen A with another plant he collected another plant specimen that was not an epiphyte. He tagged that specimen as specimen B. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which specimen would not grow on other plants, specimen A or specimen B?
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Answer: specimen B
Problem: I read this background article the other day: Gasoline-powered vehicles emit a lot of harmful materials. Nitrogen oxides are formed when atmospheric nitrogen reacts with oxygen at the high temperatures found in a car engine. Carbon monoxide is a by-product of incomplete combustion of hydrocarbons. Evaporated and unused fuel releases volatile hydrocarbons into the atmosphere to help form smog. The presence of a catalytic converter in the exhaust system of the car causes these materials to react and be changed into less harmful products. I am facing a new situation today: Berg city used only gas powered vehicles while Hill city used electrical vehicles. The two cities had a similar population and vehicle numbers. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which city had fewer vehicles releasing harmful volatile hydrocarbons into the atmosphere?

A: Hill
input: Please answer the following: I read this background article the other day: Sometimes muscles and tendons get injured when a person starts doing an activity before they have warmed up properly. A warm up is a slow increase in the intensity of a physical activity that prepares muscles for an activity. Warming up increases the blood flow to the muscles and increases the heart rate. Warmed-up muscles and tendons are less likely to get injured. For example, before running or playing soccer, a person might jog slowly to warm muscles and increase their heart rate. Even elite athletes need to warm up ( Figure below ). I am facing a new situation today: Two teams were competing in a 5 km race. White team warmed up before the race, but Blue team arrived with a bus late and didn't have time to warm up properly before the race. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which team experienced more muscle and tendon injuries?
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output:
Blue