collision frequency
What collision frequency means in Physics GCSE, as defined for AQA.
Definitions of collision frequency
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Check what you remember
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Reference: AQA
How often the molecules strike the container walls, which falls when the molecules are further apart and travel further between hits.
Fewer molecules around a surface at a greater height means fewer collisions with it each second.
Topics that use collision frequency
- Atmospheric pressure (AQA GCSE)
- Pressure in gases (physics only) (AQA GCSE)
Related terms
- force per unit area
- altitude
- average density
- column of air
- comparing heights
- compression and expansion
- compression by the air above
- consistent units
Using collision frequency in the exam
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