Two glass discs of radius `R = 5.0 cm` were wetted with water and put together so that the thickness of the water layer between them was `h = 1.9 mu m`. Assuming the wetting to be complete. Find the force that has to be applied at right angles to the plates in order to pull them apart.

Two glass discs of radius `R = 5.0 cm` were wetted with water and put

1.	Two glass discs of radius `R = 5.0 cm` were wetted with water and put together so that the thickness of the water layer between them was `h = 1.9 mu m`. Assuming the wetting to be complete. Find the force that has to be applied at right angles to the plates in order to pull them apart.
Answer» This is analogous to the previous prolem except that : `A = pi R^2` So `F = (2 pi R^2 alpha)/(h) = 0.6 kN`.

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Two glass discs of radius `R = 5.0 cm` were wetted with water and put together so that the thickness of the water layer between them was `h = 1.9 mu m`. Assuming the wetting to be complete. Find the force that has to be applied at right angles to the plates in order to pull them apart.

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