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A thermally insulated vessel contains an ideal gas of molecular mass M and ratio of specific heats 1.4. Vessel is moving with speed ν and is suddenly brought to rest. Assuming no heat is lost to the surrounding and vessel temperature of the gas increases by (R = universal gas constant)

1. R 7 Mv 2
2. R 5 Mv 2
3. R 7 Mv 2 2
4. R 5 Mv 7 2

Correct answer: R 5 Mv 2

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