A thermos bottle containing coffee is vigorously shaken. If the coffee is considered as a system, then the temperature of the coffee will :

increase slightly

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fall

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remain the same

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it cannot be determined

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Solution

The correct option is B increase slightly
The correct answer is option(A).
Since the thermos bottle is vigorously shaken, the kinetic energy of molecules in the coffee will be increased. As the temperature is directly proportional to the average kinetic energy of the molecule, therefore temperature of the coffee will be increased.

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Hot coffee in a thermos flask is shaken vigorously, considering it as a system which of the statement is not true?

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