Physics: Chapter 16

25 July 2022
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D. all of these
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Substances absorbs heat energy by the process of A. conduction B. convection C. radiation E. all of these
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A. a poor insulator
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A good heat conductor is A. a poor insulator B. a good insulator C. neither a poor nor a good insulator
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A. density and less pressure
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Warm air rises because faster-moving molecules tend to move to regions of less A. density and less pressure B. pressure C. density
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B. the shorter the wavelengths it radiates
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The higher the temperature of an object A. the longer the wavelengths it radiates B. the shorter the wavelengths it radiates C. makes no difference in the wavelengths it radiates
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A. absorbs radiation relatively well
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Objects that radiate relatively well A. absorbs radiation relatively well B. reflect radiation relatively well C. both of these D. neither of these
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C. internal energy decreases
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If a solid object radiates more energy than it absorbs, its A. internal energy and temperature decrease B. temperature decreases C. internal energy decreases D. none of the above choices are true
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A. Black pot
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A liter of hot water will cool to room temperature faster in a A. black pot B. silver pot C. red pot D. depends more on the size of the pot than its color
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A. both the sun and the earth
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Which body glows with electromagnetic waves? A. both the sun and the earth B. only the sun C. only the earth D. neither the sun or the earth
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C. radiation
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The planet earth loses heat mainly by A. conduction B. convection C. radiation D. all of these
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A. considerably colder
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If air were a better conductor that it is, at night time the earth would be A. considerably colder B. considerably warmer C. not appreciably different in temperature
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C. both of these
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Newtons law of cooling applies to objects that are A. cooling B. heating C. both of these D. none of these
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B. low thermal conductivity of the coals
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One of the main reasons one can walk barefoot on red-hot coals of wood without burning the feet has to do with A. low temperature of the coals B. low thermal conductivity of the coals C. mind over matter techniques
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A. increases
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When a volume of air is compressed, its temperature A. increases B. decreases C> neither increases nor decreases
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C. poor absorber of radiation
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A good reflector of radiation is a A. good absorber of radiation B. good emitter of radiation C. poor absorber of radiation D. none of these
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B. has a higher temperature than the Earth
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The reason the sun's radiant energy is of shorter wavelengths than the Earth's is because the sun A. has much more internal energy B. has a higher temperature than the Earth C. is an energy source while the Earth is primarily an energy receiver D. all of these E. none of these