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Question
Foreign ions introduced to waterA) lower the freezing point of water.
B) raise the freezing point of water.
C) do not affect water's freezing point.
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
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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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When snow falls, the surrounding air is normally
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When bringing water to a boil in the mountains, the time needed to reach the boiling point is
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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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Q:
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Q:
Long ago a runaway greenhouse effect greatly transformed the planet
A) Mercury.
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D) none of the above
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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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Q:
A good reflector of radiation is a
A) good absorber of radiation.
B) good emitter of radiation.
C) poor absorber 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
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Q:
If a volume of air is warmed, it expands. If a volume of air expands, it
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A) conduction.
B) convection.
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Q:
A water-filled paper cup held in a flame will not catch fire because
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Q:
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A) an igloo.
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Q:
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Q:
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B) Calories.
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A) contains.
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Heat energy is measured in units of
A) degrees.
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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.