Pressure and Depth
3 marks · NormalA tank is filled with oil to a depth of m. The density of the oil is . Take gravitational field strength as .
Calculate the pressure difference between the top and the bottom of the tank.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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22500 Pa (±100)
Must show: method shown
Also accept: 22680 Pa if g=9.81
Common mistakes: forgetting to use correct density; missing units; using incorrect formula
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Marking points
M1 · 1 mark · Substitutes correct values into p = hρg.
M2 · 1 mark · Correct multiplication or intermediate step. (follow-through)
A1 · 1 mark · Correct final answer with unit: 22500 Pa. (follow-through)
Worked solution
The pressure difference is .