A u-shaped tube is connected to a flexible tube that has a membrane-covered funnel on the opposite end as shown in the drawing.Justin finds that no matter which way he orients to membrane,the height of the liquid in the u-shaped tube does not change.Which of the following choices best describes this behavior?
A)Archimedes' principle
B)Bernoulli's principle
C)continuity equation
D)irrotational flow
E)Pascal's principle

Question

A u-shaped tube is connected to a flexible tube that has a membrane-covered funnel on the opposite end as shown in the drawing.Justin finds that no matter which way he orients to membrane,the height of the liquid in the u-shaped tube does not change.Which of the following choices best describes this behavior? 
A)Archimedes' principle 
B)Bernoulli's principle 
C)continuity equation 
D)irrotational flow 
E)Pascal's principle

Quizplus · Accepted Answer

This behavior can be explained by Pascal's principle, which states that pressure applied to a fluid in a closed container is transmitted equally in all directions. In this case, when the membrane is pressed, it increases the pressure in the flexible tube, which is transmitted to the liquid in the u-shaped tube, causing it to rise. Since the height of the liquid does not change regardless of the orientation of the membrane, this indicates that the pressure is being transmitted equally in all directions, consistent with Pascal's principle.

A U-Shaped Tube Is Connected to a Flexible Tube That