(b) In Fig Q2 (b), the mercury in the left column of the manometer is falling at the rate of 25 mm/s. The left column is 450 mm long, and

the right column is 550 mm long. What is the vertical momentum of the mercury? The manometer has a 6 mm inside diameter. Mercury weighs 133 kN/m³.

Fig: 1

Fig: 2