JEE Main 2002 Physics question

Cooking gas containers are kept in a lorry moving with uniform speed. The temperature of the gas molecules inside will

(1)increase
(2)decrease
(3)remain sameCorrect
(4)decrease for some, while increase for others

Answer: (3)

Solution

Temperature of a gas is determined by the random (thermal) motion of molecules relative to the centre of mass of the gas. When the container moves with uniform velocity, every molecule gets the same additional ordered velocity; this bulk motion does not change the random

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Question ID VK-037866