Question

part a

a jar is completely filled with water, and then it is sealed with a lid. if you push down on the lid with a pressure of 1000 pa, what happens to the water pressure at the bottom of the jar?

• the water pressure at the bottom of the jar will increase by less than 1000 pa.
• the water pressure at the bottom of the jar remains unchanged.
• the water pressure at the bottom of the jar depends on the height of the jar.
• the water pressure at the bottom of the jar will increase by more than 1000 pa.
• the water pressure at the bottom of the jar will increase by 1000 pa.

Explanation:

Apply Pascal's Principle

$$ \Delta P_{\text{bottom}} = \Delta P_{\text{applied}} = 1000\text{ Pa} $$

Determine the change in pressure

$$ P_{\text{new, bottom}} = P_{\text{initial, bottom}} + 1000\text{ Pa} $$

Answer:

• The water pressure at the bottom of the jar will increase by less than 1000 Pa.
• The water pressure at the bottom of the jar remains unchanged.
• The water pressure at the bottom of the jar depends on the height of the jar.
• The water pressure at the bottom of the jar will increase by more than 1000 Pa.
• The water pressure at the bottom of the jar will increase by 1000 Pa. (Correct answer)