A student wishes to find the velocity of air flowing through a pipe. He has a pressure gauge which displays only the dynamic pressure. The pressure gauge reads 0.018 mm Hg. Assume density of air to be 1.225 kg/m^3, find the velocity V of air (ρHg = 13600 kg/m^3).
(a) 4 m/s
(b) 2 m/s
(c) 20 m/s
(d) 40 m/s
I have been asked this question during an interview.
Question is from Introduction to Fluid Dynamics topic in portion Fluid Dynamics of Fluid Mechanics