For mercury on glass, the cohesive forces within the mercury are much stronger than the adhesive forces between the mercury and the glass. This causes the mercury to minimize its contact area with the glass and form a convex meniscus. The contact angle, measured within the liquid droplet from the solid surface to the tangent of the liquid-vapor interface, is therefore greater than 90 degrees.
Contact angle of mercury with respect to glass is
Asked in WBCS Main Paper 4 2022 · Topic: Physical Properties of Materials (Viscosity and Surface Tension)
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