The diagram shows a manometer containing a liquid. The manometer is used to find the difference between the pressure of a gas and atmospheric pressure. Which distance represents this pressure difference?

The diagram shows a mercury barometer. Which distance is used to calculate the pressure of the atmosphere?

The diagram shows a simple mercury barometer. The atmospheric pressure increases. Which distance increases?

Water manometer is used to measure the pressure of a gas supply to a house. It gives a reading of h cm of water. Why is it better to use water rather than mercury in this manometer?

The pressure of a gas is measured using a manometer as shown in the diagram. The mercury in the manometer is replaced with a liquid that is less dense. How does the value of h change?

The diagram show two mercury barometer standing side by side. The right-hand diagram shows a tube bigger diameter, but the diagram is incomplete. There is a vacuum above the mercury in both tubes. Which labelled position on the right-hand tube could show the mercury level in that tube?

A manometer is used to measure the pressure of air in a container. Which change would give a smaller value of height h?

The diagram shows a manometer with one side connected to a gas cylinder and the other side open to the atmosphere. Which conclusion can be made using only the information from liquid levels in the manometer?