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MHT CET Physics question

PhysicsMechanical Properties of FluidsMHT CET

A water drop of 0.05 is squeezed between two glass plates and spreads into area of 40 . If the surface tension of water is 70 , then the normal force required to separate the glass plates from each other will be

Answer: (B)

Solution

Film thickness cm, and the force needed is \dfrac{2SA}{t}\dfrac{2SA^2}{V}$ =

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Question ID VK-062094