A doctor has a patient blow on one side of a U-shaped tube that is partially
filled with water and has a ball floating on the other side, as shown in the
image below. If the ball rises with a force of 150 N, what pressure did the
patient apply to his side of the tube?
Direction of
blowing air
Area = 0.001 m2
A. 150 Pa
B. 100,000 Pa
C. 150,000 Pa
D. 0.15 Pa