Edexcel GCSE Physics · 1PH0
Specification 1.3 · Paper 1, Paper 2
Revise: Unit ConversionTo convert units, begin with a known equality called a conversion factor.
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GCSE Physics · key term
A numerical relationship used to change a measurement from one unit to another without changing the quantity represented.
Used by Edexcel and OCR
Specification 1.3 · Paper 1, Paper 2
Revise: Unit ConversionTo convert units, begin with a known equality called a conversion factor.
Specification P2.1c, P8.1c · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A numerical multiplier that expresses the relationship between two units and is used to convert a measurement without changing the quantity represented.
A ratio equal to 1 that is used to replace one unit with an equivalent unit without changing the physical quantity.
Paper 1, Paper 2
A ratio equal to one that changes the unit used to express a quantity without changing the quantity itself.
Revise: Units, Prefixes and Significant FiguresExact counted quantities and defined conversion factors do not impose measurement uncertainty in the same way as measured readings. The final value should communicate what the evidence justifies, not merely everything displayed by a calculator.
For squared or cubed units, square or cube the length conversion factor: is not .
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