Question

exam lesson name: states of matter
exam number: 700698rr
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question 18 of 20 :
select the best answer for the question.

1. what happens whenever the pressure in a confined liquid increases or decreases at any point?

○ a. the pressure decreases in one area but increases in another area.
○ b. the pressure causes the liquid molecules to slow their movement.
○ c. the change in pressure is transmitted equally throughout the entire liquid.
○ d. the change in pressure decreases with distance from the pressure point.
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Explanation:

To solve this, we recall Pascal's Principle, which states that a change in pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the containing vessel.

• Option A is incorrect because Pascal's Principle says pressure change is transmitted equally, not that it increases in one area and decreases in another.
• Option B is incorrect as pressure change in a liquid (for Pascal's context) doesn't directly relate to slowing molecular movement (molecular movement is more related to temperature).
• Option C matches Pascal's Principle: the change in pressure in a confined liquid is transmitted equally throughout the entire liquid.
• Option D is incorrect because the change in pressure is transmitted equally, not decreasing with distance.

Answer:

C. The change in pressure is transmitted equally throughout the entire liquid.