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Question
An object is thrown vertically into the air. Because of air resistance, the time for its descent will beA) longer than the ascent time.
B) shorter than the ascent time.
C) equal to the ascent time.
D) not enough information
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
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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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When bringing water to a boil in the mountains, the time needed to reach the boiling point is
A) less than at sea level.
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C) the same as at sea level.
Q:
A good cook knows that the temperature of violently boiling water is
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B) the same as that of simmering water.
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A) decreased pressure in the water.
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D) energy of the whole system.
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Q:
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A) speed.
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Q:
Long ago a runaway greenhouse effect greatly transformed the planet
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A) conduction.
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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.
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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:
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Q:
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A) still warm.
B) cool.
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Q:
Coastal winds that shift from night to day illustrate
A) conduction.
B) convection.
C) radiation.
D) all about equally
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:
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Q:
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A) an igloo.
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Q:
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B) slows heat flow.
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A) calories.
B) Calories.
C) joules.
D) any or all of the above for special cases
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A) contains.
B) transfers.
C) both of these
D) none of the above
Q:
Heat energy is measured in units of
A) degrees.
B) joules.
C) calories.
D) both joules and calories.