College Physics Problem 1.14


An infant’s pulse rate is measured to be 130±5 beats/min. What is the percent uncertainty in this measurement?


Solution:

The percent uncertainty can be calculated as 

\displaystyle \%\:uncertainty\:=\frac{\delta _A}{A}\times 100\%

\displaystyle \%\:uncertainty\:=\frac{5\:beats/min}{130\:beats/min}\times 100\%

\displaystyle \%\:uncertainty\:=3.85\:\%

Therefore, the percent uncertainty is 3.85%.