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Topic 01Physics (Cambridge)

Physical quantities and units

Physical quantities and units — Cambridge International AS & A Level Physics (9702, Topic 1). SI base and derived units, prefixes, checking homogeneity of equations, and estimating physical quantities.

Practice questions
1

Physical Quantities and Units

a physical quantity = a numerical magnitude × a unit; the seven SI base quantities and units · derived units expressed in SI base units (e.g. N = kg m s⁻²) · prefixes from pico to tera · checking the homogeneity of an equation by its base units · making order-of-magnitude estimates of physical quantities

35 min