Physics: Chapter 16

A. a poor insulator

A good heat conductor is A. a poor insulator B. a good insulator C. neither a poor nor a good insulator

C. poor absorber of radiation

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

A. Black pot

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

C. internal energy decreases

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

A. considerably colder

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

C. both of these

Newtons law of cooling applies to objects that are A. cooling B. heating C. both of these D. none of these

A. absorbs radiation relatively well

Objects that radiate relatively well A. absorbs radiation relatively well B. reflect radiation relatively well C. both of these D. neither of these

B. low thermal conductivity of the coals

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

D. all of these

Substances absorbs heat energy by the process of A. conduction B. convection C. radiation E. all of these

B. the shorter the wavelengths it radiates

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

C. radiation

The planet earth loses heat mainly by A. conduction B. convection C. radiation D. all of these

B. has a higher temperature than the Earth

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

A. density and less pressure

Warm air rises because faster-moving molecules tend to move to regions of less A. density and less pressure B. pressure C. density

A. increases

When a volume of air is compressed, its temperature A. increases B. decreases C> neither increases nor decreases

A. both the sun and the earth

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