A-Level Physics Specification

OCR A H556

Section 2.1.2: S.I. units

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#2.1.2a

Système Internationale (S.I.) base quantities and their units – mass (kg), length (m), time (s), current (A), temperature (K), amount of substance (mol)

#2.1.2b

derived units of S.I. base units

Examples:
momentum ⟶ kg m s–1 and
density ⟶ kg m–3

#2.1.2c

units listed in this specification

#2.1.2d

checking the homogeneity of physical equations using S.I. base units

#2.1.2e

prefixes and their symbols to indicate decimal submultiples or multiples of units – pico (p), nano (n), micro (μ), milli (m), centi (c), deci (d), kilo (k), mega (M), giga (G), tera (T)

As set out in the ASE publication Signs, Symbols and Systematics (The ASE Companion to 16–19 Science, 2000).

#2.1.2f

the conventions used for labelling graph axes and table columns.

As set out in above, e.g. speed / m s–1.