At what speed, the velocity head of water is equal to the pressure head of 40 cm of Hg ? Density of mercury = 13.6 gm /cm^3 At what speed the velocity head of water is equal to the pressure head of 40 cm of Hg ? Density of mercury = 13.6 gm /cm^3 September 20, 2020 Category: Chapter 13 - Fluid Mechanics , MTG NEET Physics , Part 1 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related