The following diagram gives the formula for pressure: pressure = force ÷ area.

How to calculate the pressure of fluid acting at a surface?

Explain why atmospheric pressure decreases with an increase in height.

Example:

A gas inside a container applies a force of 400 000N. THe walls of the container have an area of 8 m

How to calculate the pressure of a liquid?

How the pressure of a liquid leads to the force of upthrust?

Explain why objects float or sink.

Describe the factors which influence floating and sinking.

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