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Question
The photo on page 193 shows Lillian's hair standing out when her hand is on a charged Van de Graaff generator, which illustratesA) strands of hair become charged and repel one another.
B) a high voltage is communicated to strands of hair.
C) strands of hair orient themselves in an electric field.
D) the effect of electrons and protons deposited on her hair.
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
Q:
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
A) and decreases in temperature.
B) and increases in temperature.
C) without a temperature change.
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Q:
When snow falls, the surrounding air is normally
A) cooled.
B) warmed.
C) both of these
D) none of the above
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When a gas changes phase to become a solid, energy is
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B) released.
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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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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
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B) the same as that of simmering water.
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When water boils, energy added to the water is counteracted by
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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
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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
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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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Radiant energy emitted by our planet is
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A) warms.
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A) still warm.
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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.
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A) an igloo.
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In practice, a good insulator
A) stops heat flow.
B) slows heat flow.
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Thermal energy is measured in
A) calories.
B) Calories.
C) joules.
D) any or all of the above for special cases
Q:
Heat is thermal energy that matter
A) contains.
B) transfers.
C) both of these
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Q:
Heat energy is measured in units of
A) degrees.
B) joules.
C) calories.
D) both joules and calories.