SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A sealed container of air is kept at a constant temperature. What will happen to the speed of the molecules of air in the container as time passes?
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The molecules will all reach the same speed.
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Some molecules will speed up and others will slow down, but the average speed will be constant.
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The molecules will slow down.
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There will be no change.
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Explanation:
Detailed explanation-1: -A sealed container of air is kept at a constant temperature. What will happen to the speed of the molecules of air in the container as time passes? The molecules will all reach the same speed.
Detailed explanation-2: -The motion of the particles is increased by raising the temperature. Conversely, the motion of the particles is reduced by lowering the temperature, until, at the absolute zero (0 K), the motion of the particles ceases altogether. Because the particles are in motion, they will have kinetic energy.
Detailed explanation-3: -As the molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled.
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