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Questions and Answers
Which one of the following statements about air pressure and density is correct?
Which one of the following statements about air pressure and density is correct?
- Air under greater pressure weighs less than air under lower pressure.
- Air under greater pressure weighs half as much as air under lower pressure.
- Air under greater pressure weighs twice as much as air under lower pressure. (correct)
- Air under greater pressure weighs the same as air under lower pressure.
Which one of the following statements about gas density is correct?
Which one of the following statements about gas density is correct?
- Density of gases varies inversely with pressure.
- Density of gases varies directly with temperature.
- Density of gases varies directly with pressure. (correct)
- Density of gases varies inversely with temperature.
Which one of the following statements about humidity is correct?
Which one of the following statements about humidity is correct?
- On damp days, the air density is greater than on dry days. (correct)
- Absolute humidity is the ratio of moisture actually in the air to the moisture it would hold if it were saturated at the same temperature and pressure.
- Relative humidity is the weight of water vapor in a unit volume of air.
- Density of air varies directly with humidity.
Which one of the following statements about water vapor in air is correct?
Which one of the following statements about water vapor in air is correct?
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Which one of the following statements about motion and rest is correct?
Which one of the following statements about motion and rest is correct?
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