pressure difference
What pressure difference means in Physics GCSE, as defined for AQA.
Definitions of pressure difference
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Reference: AQA
The difference between the pushes on the bottom and top faces depends on the vertical height of the block and the density of the liquid, not on how deep the block is overall.
The difference between the greater pressure at the bottom and the pressure at the top, which multiplied by the area of the face gives the size of the upward resultant.
The difference in pressure between two depths in a liquid, found using the difference in height because density and field strength are the same at both.
Topics that use pressure difference
- Pressure in a fluid 2 (HT only) (AQA GCSE)
Related terms
- average density
- column of liquid
- Density
- density comparison
- floating and sinking
- Gravitational field strength
- pressure with depth
- submerged object
Using pressure difference in the exam
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