Unit conversion
What Unit conversion means in Physics A-Level, as defined for AQA, OCR.
Definitions of Unit conversion
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Reference: OCR
To convert a length from kilometres to metres, multiply by 1000, or equivalently multiply by 10³; to convert metres to kilometres, divide by 1000.
Multiply or divide by the appropriate power of ten, or use a known equivalence between units of the same quantity.
In calculations, convert grams to kilograms by dividing by 1000, for example 250 g = 0.25 kg.
Changing between units where necessary, such as cm³ to m³ by multiplying by 10⁻⁶.
Topics that use Unit conversion
- Use of SI units and their prefixes (AQA A-Level)
- S.I. units (OCR A-Level)
Related terms
- Base units
- Dimensional analysis
- S.I. base quantities
- Avogadro constant
- Derived units
- Mass and the kilogram
- Molar calculations
- Prefixes and unit conversion
Using Unit conversion in the exam
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