Percentage uncertainty is a measure of the amount of error or uncertainty in a measurement. It is expressed as a percentage of the measured value.
To calculate percentage uncertainty, you divide the uncertainty of the measurement by the measured value and multiply by 100%. The formula is (uncertainty/measured value) x 100%.
Adding percentage uncertainty allows for a more accurate representation of the total uncertainty in a measurement. It takes into account both the precision of the measurement and the accuracy of the measuring instrument.
No, percentage uncertainty cannot be negative. It is always expressed as a positive value, since uncertainty is a measure of potential error or deviation from the true value.
Percentage uncertainty is often used to calculate the overall uncertainty in a series of measurements or to compare the precision and accuracy of different measuring instruments. It is also important in reporting and analyzing experimental results.