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Question
A sandbag is motionless in outer space. A second sandbag with 3 times the mass moving at 12 m/s collides with it and they both stick together and move at a speed ofA) 3 m/s.
B) 4 m/s.
C) 6 m/s.
D) 8 m/s.
E) 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
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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.
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Q:
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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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Q:
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Long ago a runaway greenhouse effect greatly transformed the planet
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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:
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A) still warm.
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Q:
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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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Q:
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Q:
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B) slows heat flow.
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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.