Pressure in fluids GCSE questions
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Practice questions
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Pressure p =
1 pascal equals
Liquid pressure at depth h is
At the same depth in the same liquid, pressure is
Common mistakes
- Do not leave area in cm^2. 1 m^2 = 10 000 cm^2. Pressure is not a force - do not give the answer in newtons.
- Do not use the slanted length of a slide as h. Do not use g = 9.8 m/s^2 in the wrong unit story - here it is N/kg, same number.
- Boats do not float "because air is lighter than steel" as a complete answer - you need displaced water weight. Upthrust is not the same as atmospheric pressure.
- There is still plenty of air on a mountain - pressure is lower, not zero. A vacuum cleaner does not "suck" with a magic pull force; outside air pushes.
Answers and working
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