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P11 Force and Pressure (Pressure in a Liquid at Rest (The greater the…
P11 Force and Pressure
Pressure and Surfaces
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The unit of pressure is the pascal (Pa), which is equal to 1N/m^2
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Atmospheric Pressure
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The force on a flat object due to a pressure difference = the pressure difference x the area of the flat surface
Atmospheric pressure decreases with higher altitude because there is less air above a given altitude than there is at a lower altitude
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Upthrust and Flotation
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The pressure at a point in a fluid depends on the density of the fluid and the depth of the fluid at that point
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