Pressure in Fluids Flashcards

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What two things do you need to know to calculate pressure?

The weight or force applied (measured in newtons) and the surface area on which the weight or force is applied (measured in square metres).

How is pressure calculated?

Pressure = Force ÷ Area

What is the unit of pressure and what does 1 Pascal equal?

Pressure is measured in Pascals (Pa), and 1 Pascal equals 1 N/m2.

How does the pressure differ when using the broad side versus the sharp point of a drawing pin?

The broad side exerts less pressure on your finger due to a larger surface area, while the sharp point exerts greater pressure on the wall due to a smaller surface area.

How does atmospheric pressure change with altitude?

At higher altitudes, the air pressure is lower; at lower altitudes, the air pressure is higher.

How does liquid pressure change with depth?

Liquid pressure increases with depth due to the weight of the liquid above.

Revision Notes
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