Pressure and Depth
2 marks · EasyA tank contains water to a depth of 4.0 m. The density of water is 1000 kg/m³. Take gravitational field strength g = 10 N/kg. Calculate the pressure difference between the top and the bottom of the tank.
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40,000 Pa (±500)
Also accept: 40000 Pa
Common mistakes: Incorrectly multiplying or dividing by gravity/density/depth; Unit error
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Marking points
M1 · 1 mark · Substitutes values into p = h × \rho × g correctly.
A1 · 1 mark · Final answer correct with unit.
Worked solution
Substitute into the equation: p = h × \rho × g