You may also like

problem icon

Alternative Record Book

In which Olympic event does a human travel fastest? Decide which events to include in your Alternative Record Book.

New Units for Old

Stage: 5 Challenge Level: Challenge Level:2 Challenge Level:2

Name Phenomenon Units Base units
becquerel, Bq (radioactivity) $(\textrm{s}^{-1})$ $\textrm{s}^{-1}$
degrees Celsius, $^\circ$ C temperature (relative) $(\textrm{K}$) $\textrm{K}$
coulomb, C electrical charge ($\textrm{A s})$ $\textrm{A s}$
farad, F capacitance $\textrm{C V}^{-1}$ $\textrm{A}^2 \textrm{ kg}^{-1} \textrm{ m}^{-2} \textrm{ s}^4$
gray, Gy radiation dose (absorbed) $\textrm{J kg}^{-1}$ $\textrm{m}^2\textrm{ s}^{-2}$
henry, H inductance $\textrm{Wb A}^{-1}$ $\textrm{A}^2\textrm{ kg m}^{2} \textrm{ s}^{-2}$
hertz, Hz frequency $(\textrm{s}^{-1})$ $\textrm{s}^{-1}$
joule, J energy $\textrm{N m}$ $\textrm{kg m}^2 \textrm{ s}^{-2}$
katal, kat catalytic activity $(\textrm{mol s}^{-1})$ $\textrm{mol s}^{-1}$
lumen, lm flux of light $\textrm{cd sr}$ $\textrm{cd m}^2 \textrm{ m}^{-2}$
lux, lx illuminance $(\textrm{cd sr m}^{-2})$ $\textrm{cd m}^2 \textrm{ m}^{-4}$
newton, N force $(\textrm{kg ms}^{-2})$ $\textrm{kg ms}^{-2}$
ohm, $\Omega$ resistance $\textrm{V A}^{-1}$ $\textrm{A}^{-2} \textrm{ kg m}^2 \textrm{ s}^{-3}$
pascal, Pa pressure $\textrm{N m}^{-2}$ $\textrm{kg m}^2 \textrm{ s}^{-2}$
radian, rad plane angle (dimensionless) $\textrm{m m}^{-1}$
siemens, S conductance $\textrm{A V}^{-1}$ $\textrm{A}^2 \textrm{ kg}^{-1} \textrm{ m}^{-2} \textrm{ s}^3$
sievert, Sv radiation dose (equivalent) $(\textrm{m}^2\textrm{ s}^{-2})$ $\textrm{m}^2\textrm{ s}^{-2}$
steradian, sr solid angle (dimensionless) $\textrm{m}^2 \textrm{ m}^{-2}$
tesla, T magnetic flux density $(\textrm{A}^{-1} \textrm{ m}^{-1} \textrm{ N})$ $\textrm{A}^{-1} \textrm{ kg s}^{-2}$
volt, V electrical potential $\textrm{W A}^{-1}$ $\textrm{A}^{-1} \textrm{ kg m}^2 \textrm{ s}^{-3}$
watt, W power $\textrm{J s}^{-1}$ $\textrm{kg m}^2 \textrm{ s}^{-3}$
weber, Wb magnetic flux $\textrm{V s}$ $\textrm{A}^{-1} \textrm{ kg m}^2 \textrm{ s}^{-2}$

(date sourced from the Bureau International des Poids et Mesures http://www.bipm.org/)

Items in parenthesis () not present in original table


The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities can be found here.
Copyright © 1997 - 2012. University of Cambridge. All rights reserved.
NRICH is part of the family of activities in the Millennium Mathematics Project.