Water in a tank is pressurized by air and pressure measured using a multi-fluid manometer. Determine the gage pressure of air in the tank if h1 = 20 cm, h2 = 30 cm, h3 = 46 cm. Given r for water, oil and Hg to be 1000 kg/m3, 800 kg/m3, and 13, 600 kg/m3, respectively.

The gauge pressure of air is 110 kpa

Explanation:

Atmospheric pressure, = 101 Kpa

where;

ρw is the density of water = 1000 kg/m³

ρo is the density of oil = 800 kg/m³

ρHg is the density of mercury = 13,600 kg/m³

g is acceleration due to gravity = 9.8 m/s²

Therefore, the gauge pressure of air is 110 kpa

what type of charge does it have? negative