A thin square plate of side 5 cm is suspended vertically from a balance so that lower…

PHYSICS · Single correct · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids

Problem

A thin square plate of side 5 cm is suspended vertically from a balance so that lower side just dips into water with plate perpendicular to surface. When the plate is clean ( θ=0∘\theta = 0^\circ ), it appears to weigh 0.044N. But when the plate is greasy ( θ=180∘\theta = 180^\circ ), it appears to weigh 0.03N. The surface tension of water is: (A) 3.5×10−23.5 \times 10^{-2} N/m (B) 7.0×10−27.0 \times 10^{-2} N/m (C) 14.0×10−214.0 \times 10^{-2} N/m (D) 1.0N N/m

Related theory

Browse the problem library