The rising of a liquid in an open and ended glass tube of narrow bore is

Assessment: WAEC SSCE - Physics - 2013 (Objective) Subject: Physics

Question 1 Report

The rising of a liquid in an open and ended glass tube of narrow bore is

Answer Details
The rising of a liquid in an open and ended glass tube of narrow bore is called capillarity. Capillarity is the result of the combination of adhesive and cohesive forces between the liquid molecules and the molecules of the tube material. In a narrow tube, the adhesive forces between the liquid and the tube are stronger than the cohesive forces between the liquid molecules themselves, causing the liquid to rise in the tube. The narrower the tube, the higher the liquid rises due to capillary action.

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