A person blows across the top of one arm of a U-tube partially filled with water.The water in that arm:
A)rises slightly
B)drops slightly
C)remains at the same height
D)rises if the blowing is soft but drops if it is hard
E)rises if the blowing is hard but drops if it is soft

Question

Quizplus · Accepted Answer

Blowing across the top of one arm of a U-tube partially filled with water creates a low-pressure area, which causes the water on that side to rise slightly.

A Person Blows Across the Top of One Arm of a U-Tube