(b) The difference h between the two liquid levels is 2.0 cm. The density of the liquid is 800 kg /m3.
Calculate the difference between the pressure of the gas and atmospheric
pressure.
.[2]
pressure difference

101201.2 Pascal.

Explanation:

Given that the difference h between the two liquid levels is 2.0 cm. The density of the liquid is 800 kg /m3.

Calculate the difference between the pressure of the gas and atmospheric

pressure.

The pressure of the gas can be calculated by using the formula

Pressure = density × acceleration due to gravity × height

Substitute all the parameters into the formula

Pressure = 800 × 2/100 × 9.8

Note that the height is converted to metre.

Pressure = 156.8 Pascal

pressure difference = 101358 - 156.8

Pressure difference = 101201.2 Pascal