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NEET 2018 Physics question

PhysicsMechanical Properties of FluidsNEET 2018

A small sphere of radius '' falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to

Answer: (1)

Solution

At terminal velocity the rate of heat production equals the power of the viscous (drag) force: . The terminal velocity is

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Question ID VK-092236