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GCSE Chemistry · key term
A rate calculated over a time interval rather than at one particular instant.
Used by OCR
Specification CM5.3i, CM6.1i · Paper 2 (Foundation), Paper 4 (Higher)
The change in a measured quantity divided by the time interval over which that change occurred.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
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The rate calculated over a chosen time interval rather than at one particular moment.
If a fixed amount of product is made, its average rate can be found by dividing that amount by the time taken to make it.