8.04 Powers

Calculations involving powers


Ignore the sign of the power and multiply the uncertainty by the power. e.g
(30 +/- 2 mm)3      uncertainty in result is      +/-( 3 x 2)      = +/- 6mm3
(30 +/- 2 mm)-3     uncertainty in result is      +/-( 3 x 2)      = +/- 6mm-3
(25 +/- 2mm2)1/2    uncertainty in result is     +/-(1/2 x 2)      = +/-1mm