Question

What is the pressure difference of the ends of a U-tube manometer filled with liquid (density = 10 kg/m^3) the difference in the height of the liquid in the tubes is 5 cm?

(a) 5 N/m^2

(b) 10 N/m^2

(c) 15 N/m^2

(d) 20 N/m^2

The question was posed to me in class test.

My doubt is from Measurement of Pressure in section Temperature and Pressure of Basic Chemical Engineering

Answer 1

The correct choice is (a) 5 N/m^2

To explain I would say: Pressure difference = dgh = 10*10*0.05 = 5 N/m^2.