SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Warmer molecules will rise to the top.
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The hot molecules produce thermal radiation that is then absorbed by the colder molecules.
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Higher-energy molecules hit lower-energy molecules, increasing their speed and therefore their temperature.
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Lower-energy molecules hit higher-energy molecules and the friction increases their temperature.
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Detailed explanation-1: -Q. When one end of a cold metal spoon is placed upright in a cup of hot coffee, the other end gets hotter. Which one of the following best describes what is happening? Warmer molecules will rise to the top.
Detailed explanation-2: -The effect of conduction can be demonstrated using cooking utensils. If a metal spoon is placed in or over a source of heat, the thermal energy from the heat source is transferred to the particles in the metal spoon. The metal spoon heats up as heat energy is transferred along the metal through conduction.
Detailed explanation-3: -Condensation is the process where water vapor becomes liquid. It is the reverse of evaporation, where liquid water becomes a vapor. Condensation happens one of two ways: Either the air is cooled to its dew point or it becomes so saturated with water vapor that it cannot hold any more water.