The internal energy of a substance can be increased by
a. doing work on it.
b. letting it do work.
c. adding heat to it.
d. extracting heat from it.
e. none of the above.
[Ques. 2] The internal energy of air can be increased by
a. compressing it. b. allowing heat to flow into it.
c. lifting it. d. allowing it to expand.
[Ques. 3] Solar energy
a. is a recent invention.
b. has been used for a long time.
c. has not yet been successfully developed.
d. is indirectly the source of most of the energy we use.
[Ques. 4] Stepping barefoot off a rug onto a hardwood floor makes your feet feel cold. Why?
a. The hardwood floor is at a lower temperature than the rug.
b. The hardwood floor is at a lower temperature than your feet.
c. The hardwood floor conducts heat away from your feet better than the rug.
d. all of the above
[Ques. 5] Absolute zero is
a. 0 K. b. 459.67F.
c. 273.15C. d. 0 on any temperature scale.
[Ques. 6] In the first law of thermodynamics, the work can be
a. only positive. b. only negative.
c. neither. d. either positive or negative.
[Ques. 7] The specific heat capacity of a substance is the amount of energy required to raise 1 kg of the substance by a temperature of
a. 1F. b. 10 C.
c. 10 F. d. 1C.
[Ques. 8] As long as there is ice in your drink, the temperature of the ice remains near
a. room temperature. b. the temperature of the drink.
c. zero Celsius. d. zero Fahrenheit.
[Ques. 9] Heat flows from
a. cold to hot. b. hot to cold.
c. Kelvin to Celsius. d. the same as temperature.
[Ques. 10] Heat transfer by radiation occurs via
a. electromagnetic waves.
b. nuclear decay.
c. molecular collisions.
d. the solar wind.
e. none of the above.
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