Interpretation:
The reason for the surface of water in graduated cylinder to be curved needs to be explained.
Concept introduction:
Graduated cylinder is the cylinder in which measurements are marked.

Answer to Problem 61A
Due to Adhesion and cohesion forces the surface of water in a graduated cylinder is curved.
Explanation of Solution
The adhesive force or adhesion between water and glass is greater than the cohesive forces or cohesion between water molecules. Due to more adhesive force, surface of water in a graduated cylinder becomes curved.
Adhesion is more than cohesion at the surface which makes the surface of water curved.
Chapter 12 Solutions
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