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Question
If an object radiates more energy than it absorbs, itsA) thermal energy decreases.
B) temperature decreases.
C) both of these
D) none of the above
Answer
This answer is hidden. It contains 1 characters.
Related questions
Q:
Which requires more energy?
A) melting a gram of 0C ice
B) increasing the temperature of 1 gram of water from 0C to 100C
C) changing 1 gram of 100C water to 100C steam
D) all the same
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In walking barefoot on red-hot coals, providing that bits of coal do not stick to your feet, it would be safer if your feet are
A) wet.
B) dry.
C) either of these
D) none of the above
Q:
As a block of ice at 0C melts, the block absorbs energy
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B) and increases in temperature.
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Q:
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Q:
When a gas changes phase to become a solid, energy is
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Foreign ions introduced to water
A) lower the freezing point of water.
B) raise the freezing point of water.
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Q:
When bringing water to a boil in the mountains, the time needed to reach the boiling point is
A) less than at sea level.
B) more than at sea level.
C) the same as at sea level.
Q:
A good cook knows that the temperature of violently boiling water is
A) higher than that of simmering water.
B) the same as that of simmering water.
C) actually lower than 100C.
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When water boils, energy added to the water is counteracted by
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B) static equilibrium.
C) energy carried away by steam.
D) energy of the whole system.
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Q:
A mixture of light and heavy molecules make up a sample of gas. If the temperature of the gas is constant, then all the molecules have the same average
A) speed.
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C) both of these
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Sublimation is a change of phase from solid to gas without
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The molecules in a room-temperature glass of water jostle around at
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Q:
Long ago a runaway greenhouse effect greatly transformed the planet
A) Mercury.
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Q:
The planet Earth loses heat primarily by
A) conduction.
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C) radiation.
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Q:
When you leave your warm house for an hour or so on a cold day, to save energy you should turn the thermostat
A) down.
B) up.
C) off.
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Q:
A good reflector of radiation is a
A) good absorber of radiation.
B) good emitter of radiation.
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Q:
A piece of pizza is normally a net radiator of energy when its temperature is
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Q:
Radiant energy emitted by our planet is
A) terrestrial energy.
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Q:
If a volume of air is warmed, it expands. If a volume of air expands, it
A) warms.
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Q:
Blow on your hand and you feel the warmth of your breath. Pucker your lips so your breath expands as you blow and your breath is
A) still warm.
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Coastal winds that shift from night to day illustrate
A) conduction.
B) convection.
C) radiation.
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Q:
A water-filled paper cup held in a flame will not catch fire because
A) the inside of the paper is wet.
B) water is an excellent conductor of heat.
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Q:
A bare roof of a warmly heated home on a snowy day indicates
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If you were caught in freezing weather with only a candle for warmth, you would be warmer in
A) an igloo.
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Q:
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B) wood
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Q:
Thermal energy is measured in
A) calories.
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A) contains.
B) transfers.
C) both of these
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Heat energy is measured in units of
A) degrees.
B) joules.
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D) both joules and calories.
Q:
When the temperature of a fixed volume of air initially at 0 C is lowered by 1 degree, its pressure
A) decreases by 1/273.
B) decreases by 100/273.
C) increases by 1/273.
D) increases by 100/273.