Manometers & Barometers - CIE GCSE Physics

What is the pressure difference, in cm of water, shown by the manometer?

• 9

• 16

• 20

• 25

• A

• B

• C

• D

Pressure can be measure in cm of water.

What is the pressure of the gas?

• 8 cm of water more than atmospheric pressure

• 12 cm of water more than atmospheric pressure

• 8 cm of water less than atmospheric pressure

• 12 cm of water less than atmospheric pressure

• A

• B

• C

• D

Which gas has a greater pressure?

• air

• methane

• The gas pressures are equal

A manometer is used to measure the pressure of an unknown gas. What is the Pressure of the unknown gas? (atmospheric pressure = 100 kPa, density of mercury = 13,600 kg/m³)

• 121.8 kPa

• 128.6 kPa

• 106.8 kPa

• 93.2 kPa

Which gas has a greater pressure?

• Gas C

• Air

• The gas pressures are equal

The pressure inside the toy is

• more than the air pressure

• less than the air pressure

• equal to the air pressure

• equal to the gauge pressure

The height difference (here in the picture) between the levels of the u tube manometer is equal to the

• atmospheric pressure

• the difference between air pressure and gas pressure

• none

• gas pressure

What is the pressure of trapped gas

• 76 cm of Hg

• 66 cm of Hg

• 86 cm of Hg

• 10 cm of Hg