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Paper 1 · units and dimensions

The base units of Planck's constant are

Akgms2kg\,m\,s^{-2}
Bkgm1s2kg\,m^{-1}\,s^{-2}
Ckgm2s1kg\,m^2\,s^{-1}
Dkgsm1kg\,s\,m^{-1}
Explanation: E = hf, so h = E/f. Energy has units kg m² s⁻², frequency s⁻¹, so h has units kg m² s⁻².

ZIMSEC Physics Paper 1, June 2009, Q2

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