c) Absolute and percentage uncertainties
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8 Terms
define uncertainty
the estimated difference between the measurement reading and the true value
define absolute uncertainty
a fixed quantity where the true value is estimated to lie
state how an absolute uncertainty is written
± the resolution of the measuring instrument
(given in the same unit as the measurement reading)
define percentage uncertainty
a percentage of the measurement reading where the true value is estimated to lie
state how to calculate the percentage uncertainty
absolute uncertainty / measurement reading
(given in no units)
state how to find the uncertainty when adding/subtracting the measurement readings
add the absolute uncertainties
state how to find the uncertainty when multiplying/dividing the measurement readings
add the percentage uncertainties
state how to find the uncertainty when raising the measurement readings to a power
multiply the percentage uncertainties by the power
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