Suppose air, with a density of 1.29 kg / m3 is flowing into a Venturi meter. The

Question:

Suppose air, with a density of 1.29 kg / m3 is flowing into a Venturi meter. The narrow section of the pipe at point A has a diameter that is 1 / 3 of the diameter of the larger section of the pipe at point B. The U-shaped tube is filled with water and the difference in height between the two sections of pipe is 1.75 cm. How fast is the air moving at point B?