Question

At what speed will the velocity head of a stream of water will be equal to 40 cm

Answer 1

Given :-

At what speed will the velocity head of a stream of water will be equal to 40 cm.

Solution:-

h = 40cm = 0.4m − head mercury column; Velocity head = 40cm of Hg column hw = h ∙ 13.6 cm of water column.

hw = v 2 2g v 2 = 2ghw v = √2ghw = √2 ∙

9.8 m s 2 ∙ 0.4m ∙ 13.6 = 10.3 m s.