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JEE Main Physics question

PhysicsKinetic Theory of GasesJEE Main

A rocket is propelled by a gas which is initially at a temperature of 4000 K. The temperature of the gas falls to 1000 K as it leaves the exhaust nozzle. The gas which will acquire the largest momentum while leaving the nozzle is

Answer: (D)

Solution

For gas molecules at a common translational kinetic energy (set by the given temperature drop), momentum p = √(2m·KE) ∝ √m. The

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Question ID VK-153329