density comparison
What density comparison means in Physics GCSE, as defined for AQA, OCR.
Definitions of density comparison
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Reference: AQA
Comparing the density of the object with the density of the fluid: if the object's density is lower, upthrust beats its weight and it rises.
An object less dense than the fluid floats, one more dense sinks, so overall density rather than material alone decides the result.
Topics that use density comparison
- Pressure in a fluid 2 (HT only) (AQA GCSE)
- Pressure (OCR GCSE)
Related terms
- Gravitational field strength
- Atmospheric pressure and weight of air
- average density
- Cause-and-effect explanation
- Closed systems
- Collisions with container walls
- column of liquid
- Comparing pressures at different heights
Using density comparison in the exam
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