Answer the following question given this paragraph: There is a pressure difference when the channel narrows. This pressure difference results in a net force on the fluid: recall that pressure times area equals force. The net work done increases the fluid's kinetic energy. As a result, the pressure will drop in a rapidly-moving fluid, whether or not the fluid is confined to a tube. There are a number of common examples of pressure dropping in rapidly-moving fluids. Shower curtains have a disagreeable habit of bulging into the shower stall when the shower is on. The high-velocity stream of water and air creates a region of lower pressure inside the shower, and standard atmospheric pressure on the other side. The pressure difference results in a net force inward pushing the curtain in. You may also have noticed that when passing a truck on the highway, your car tends to veer toward it. The reason is the samethe high velocity of the air between the car and the truck creates a region of lower pressure, and the vehicles are pushed together by greater pressure on the outside. (See Figure 12.4. ) This effect was observed as far back as the mid-1800s, when it was found that trains passing in opposite directions tipped precariously toward one another. Q: What is pressure times area equal to? A:

OPTIONS:
- volume
- mass
- density
- force

Answer: force

Problem: OPTIONS:
- does not form
- explodes
- mixes
- does not dissolve
Q: Answer the following question given this paragraph: Q: How does uric acid react to water? A:
Answer: does not dissolve

Problem:OPTIONS:
- curve
- wavelength
- direction
- pitch

Answer the following question given this paragraph: How high or low a sound seems to a listener is its pitch . Pitch, in turn, depends on the frequency of sound waves. Wave frequency is the number of waves that pass a fixed point in a given amount of time. High-pitched sounds, like the sounds of the piccolo in the Figure below , have high-frequency waves. Low-pitched sounds, like the sounds of the tuba Figure below , have low-frequency waves. For a video demonstration of frequency and pitch, go to this URL: http://www. youtube. com/watch?v=irqfGYD2UKw. Q: Dependent on the frequency of sound waves, what term described how high or low a sound seems to a listener? A:
****
A: pitch

Answer the following question given this paragraph: These values suggest that water should be oxidized at the anode because a smaller potential would be neededusing reaction (ii) for the oxidation would give a less-negative cell potential. When the experiment is run, it turns out chlorine, not oxygen, is produced at the anode. The unexpected process is so common in electrochemistry that it has been given the name overpotential. The overpotential is the difference between the theoretical cell voltage and the actual voltage that is necessary to cause electrolysis. It turns out that the overpotential for oxygen is rather high and effectively makes the reduction potential more positive. As a result, under normal conditions, chlorine gas is what actually forms at the anode. Now consider the cathode. Three reductions could occur:. Q: What are the two metals within a battery called? A:
OPTIONS:
- sheath and a cathode
- anode and sheath
- anode and diode
- anode and a cathode
anode and a cathode

Answer the following question given this paragraph: A common sign that labor will be short is the so-called "bloody show. " During pregnancy, a plug of mucus accumulates in the cervical canal, blocking the entrance to the uterus. Approximately 12 days prior to the onset of true labor, this plug loosens and is expelled, along with a small amount of blood. Meanwhile, the posterior pituitary has been boosting its secretion of oxytocin, a hormone that stimulates the contractions of labor. At the same time, the myometrium increases its sensitivity to oxytocin by expressing more receptors for this hormone. As labor nears, oxytocin begins to stimulate stronger, more painful uterine contractions, whichin a positive feedback loopstimulate the secretion of prostaglandins from fetal membranes. Like oxytocin, prostaglandins also enhance uterine contractile strength. The fetal pituitary also secretes oxytocin, which increases prostaglandins even further. Given the importance of oxytocin and prostaglandins to the initiation and maintenance of labor, it is not surprising that, when a pregnancy is not progressing to labor and needs to be induced, a pharmaceutical version of these compounds (called pitocin) is administered by intravenous drip. Finally, stretching of the myometrium and cervix by a full-term fetus in the vertex (head-down) position is regarded as a stimulant to uterine contractions. The sum of these changes initiates the regular contractions known as true labor, which become more powerful and more frequent with time. The pain of labor is attributed to myometrial hypoxia during uterine contractions. Q: Oxytocin, which stimulates the contractions of labor, is a type of what? A:
OPTIONS:
- metabolite
- inhibitor
- steroid
- hormone

Answer: hormone

input with options: Answer the following question given this paragraph: Flickr:xiquinhosilva. Oceans are made of a solution of salt and water . CC BY 2.0. Q: Oceans are made of a solution of what? A:
OPTIONS:
- water and carbon
- salt and carbon
- salt and algae
- salt and water
output:
salt and water