- #1

- 181

- 6

## Homework Statement

A manometer is used to measure the pressure of a gas in a tank. The fluid used has a the specific gravity of 0.85, and the manometer column height is 55 cm, as shown in figure 3-20. If the local atmospheric pressure is 96 kPa, determine the absolute pressure within the tank.

## Homework Equations

P = SG x p

P = P atm + pgh

## The Attempt at a Solution

SOLUTION.

The reading of manometer attached to a tank is to be determined.

**Assumption**s The density of a gas in the tanks is much lower than the density of the manometer fluid.

**Properties**The specific gravity of the manometer fluids is given to be 0.85. We take the standard density of water to be 1000kg/m³.

**Analysi**s The density of the fluid is obtained by multiplying its specific gravity by the density of water,

P = SG ( p H2O ) = (0.85)(1000kg/m³) = 850 kg/m³

P = P atm + pgh

= 96 kPa + (850kg/m³)(9.81m/s²)(0.55m) x (1N/1kg.m/s^2)(1kPa/1000N/m^2)

= 100.6 kPa

*edit I figured it out