Pressure

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The lower the surface area of an object, the more pressure the object exerts, such as the heal of a stiletto sinking into grass. This is due to the equation...

Pressure (Pa or N/m2)= Force (N) / Area (m2)

Gas particles can be heated which gives the particles more energy and so they move faster and collide into more objects. This is putting pressure on the objects that they bump in to which is a force.
There is a much higher pressure in liquids than there is in gases. This is because liquids are much denser than gases. There are more particles so more collisions so a higher pressure exerted.

Increase in pressure…

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