Question

(b) an infants pulse rate is measured to be 130 ± 5 beats/min. what is the percent uncertainty in this measurement?

Explanation:

Step1: Recall percent - uncertainty formula

The formula for percent uncertainty is $\text{Percent Uncertainty}=\frac{\text{Uncertainty}}{\text{Measured Value}}\times100\%$.

Step2: Identify values

The measured value of the infant's pulse rate is $130$ beats/min and the uncertainty is $5$ beats/min.

Step3: Calculate percent uncertainty

Substitute the values into the formula: $\text{Percent Uncertainty}=\frac{5}{130}\times 100\%$.
\[

$$\begin{align*} \frac{5}{130}\times 100\%&=\frac{500}{130}\%\\ &\approx 3.85\% \end{align*}$$

\]

Answer:

$3.85\%$