Which of the following explains the… | Physics

Question 1 Report

Which of the following explains the concave meniscus of water in a glass tube?

The adhesion between water and glas is greater than the cohesion between water molecules

The cohesion between water molecule is greater than the adhesion between glass and water

The molecules of water in the glass are moving faster than the molecules in the other parts

The molecules of water at the water-air boundary are often attracted to the center of the tube

The weight of the water pulls the central part of the surface down

Answer Details

The concave meniscus of water in a glass tube is caused by the difference in the attractive forces between the water molecules and the glass. The glass attracts the water molecules, which creates an adhesive force, but the water molecules also attract each other, creating a cohesive force. In the case of a concave meniscus, the adhesive force between the water and the glass is greater than the cohesive force between the water molecules. This causes the water at the edges of the meniscus to be pulled up towards the glass, creating a concave shape. Therefore, the answer is: - The adhesion between water and glass is greater than the cohesion between water molecules.

Read lesson note on Liquids At Rest (JAMB)

Liquids At Rest

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Which of the following explains the concave meniscus of water in a glass tube?

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