Bike tyres have ____ pumped into them to ____ the pressure inside the tyres and make them more ____. The pressure increases inside the ____ because there are more ____ inside the same volume. Snow shoes are used on snow because they spread out the ____ of the person over a greater area so the pressure is ____ and they don't sink in the ____. You can calculate the pressure by dividing the force by the ____, pressure is measured in ____, the units are Pa.

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