Conceptual Physics Chapter 18 Test Questions with
Correct Answers
The lowest temperature possible in nature is
A) 0 degrees C.
B) -273 degrees C.
C) 4 K. - Answer-B) -273 degrees C.
/.A volume of air has a temperature of 0 degrees C. An equal volume of air that is twice
as hot has a temperature of
A) 0 degrees C
B) 64 degrees C
C) 100 degrees C
D) 273 degrees C
E) none of the above choices are correct - Answer-D) 273 degrees C
/.To wholly convert a given amount of heat energy into mechanical energy is
A) possible using a steam engine
B) possible using an atomic reactor
C) possible using a simple machine
D) impossible regardless of the technique used - Answer-D) impossible regardless of
the technique used
/.To totally convert a given amount of mechanical energy into heat is
A) possible.
B) impossible.
C) impossible to answer without additional information - Answer-A) possible.
/.The greater the difference in temperature between the input reservoir and the output
reservoir for a heat engine, the
A) greater the efficiency.
B) less the efficiency.
C) Neither - efficiency of a heat engine doesn't depend on temperature difference. -
Answer-A) greater the efficiency.
/.The first law of thermodynamics is a restatement of the
A) principle of entropy.
B) law of heat addition.
C) Carnot cycle.
D) conservation of energy - Answer-D) conservation of energy
/.Chinook winds tend to
A) warm an environment.
B) cool an environment.
, C) cool deserts at night.
D) warm deserts at sunrise. - Answer-A) warm an environment.
/.Systems that are left alone, tend to move toward a state of
A) less entropy.
B) more entropy.
C) no entropy. - Answer-A) less entropy.
/.A temperature inversion occurs when the upper layers of air are
A) cooler than the lower regions of air
B) warmer than the lower regions of air
C) at the same temperature as lower regions of air - Answer-B) warmer than the lower
regions of air
/.Entropy measures
A) temperature at constant pressure.
B) temperature at constant volume.
C) temperature as pressure increases.
D) temperature as volume increases.
E) messiness. - Answer-E) messiness.
/.Entropy is closely related to the
A) 1st law of thermodynamics.
B) 2nd law of thermodynamics.
C) both of these
D) neither of these - Answer-B) 2nd law of thermodynamics.
/.Blow on your hand with your open mouth and you feel the warmth of your breath.
Pucker your lips so your breath expands as you blow and your breath is
A) warmer still.
B) cooler.
C) neither warmer nor cooler. - Answer-B) cooler.
/.The Earth's atmosphere gets most of its heat
A) near the surface of the Earth.
B) at high altitudes closer to the sun.
C) from the Earth's core. - Answer-A) near the surface of the Earth.
/.Industrialization on Earth eventually heats our surroundings to temperatures that are
higher than usual. Industrialization in space habitats using exclusively solar power
eventually will thermally pollute the solar system.
A) True
B) False
C) cannot be determined without additional information - Answer-B) False
/.Adiabatic processes occur
Correct Answers
The lowest temperature possible in nature is
A) 0 degrees C.
B) -273 degrees C.
C) 4 K. - Answer-B) -273 degrees C.
/.A volume of air has a temperature of 0 degrees C. An equal volume of air that is twice
as hot has a temperature of
A) 0 degrees C
B) 64 degrees C
C) 100 degrees C
D) 273 degrees C
E) none of the above choices are correct - Answer-D) 273 degrees C
/.To wholly convert a given amount of heat energy into mechanical energy is
A) possible using a steam engine
B) possible using an atomic reactor
C) possible using a simple machine
D) impossible regardless of the technique used - Answer-D) impossible regardless of
the technique used
/.To totally convert a given amount of mechanical energy into heat is
A) possible.
B) impossible.
C) impossible to answer without additional information - Answer-A) possible.
/.The greater the difference in temperature between the input reservoir and the output
reservoir for a heat engine, the
A) greater the efficiency.
B) less the efficiency.
C) Neither - efficiency of a heat engine doesn't depend on temperature difference. -
Answer-A) greater the efficiency.
/.The first law of thermodynamics is a restatement of the
A) principle of entropy.
B) law of heat addition.
C) Carnot cycle.
D) conservation of energy - Answer-D) conservation of energy
/.Chinook winds tend to
A) warm an environment.
B) cool an environment.
, C) cool deserts at night.
D) warm deserts at sunrise. - Answer-A) warm an environment.
/.Systems that are left alone, tend to move toward a state of
A) less entropy.
B) more entropy.
C) no entropy. - Answer-A) less entropy.
/.A temperature inversion occurs when the upper layers of air are
A) cooler than the lower regions of air
B) warmer than the lower regions of air
C) at the same temperature as lower regions of air - Answer-B) warmer than the lower
regions of air
/.Entropy measures
A) temperature at constant pressure.
B) temperature at constant volume.
C) temperature as pressure increases.
D) temperature as volume increases.
E) messiness. - Answer-E) messiness.
/.Entropy is closely related to the
A) 1st law of thermodynamics.
B) 2nd law of thermodynamics.
C) both of these
D) neither of these - Answer-B) 2nd law of thermodynamics.
/.Blow on your hand with your open mouth and you feel the warmth of your breath.
Pucker your lips so your breath expands as you blow and your breath is
A) warmer still.
B) cooler.
C) neither warmer nor cooler. - Answer-B) cooler.
/.The Earth's atmosphere gets most of its heat
A) near the surface of the Earth.
B) at high altitudes closer to the sun.
C) from the Earth's core. - Answer-A) near the surface of the Earth.
/.Industrialization on Earth eventually heats our surroundings to temperatures that are
higher than usual. Industrialization in space habitats using exclusively solar power
eventually will thermally pollute the solar system.
A) True
B) False
C) cannot be determined without additional information - Answer-B) False
/.Adiabatic processes occur
