Question

Suppose your bathroom scale reads your mass as 65 kg with a 3% uncertainty. What is the uncertainty in your mass (in kilograms)?

a) 1.95 kg
b) 1.75 kg
c) 1.85 kg
d) 1.55 kg

Answer 1

65 × .03 = 1.95

The correct answer is A.

Answer 2

The uncertainty in your mass when measured as 65 kg with a 3% uncertainty is 1.95 kg.

Step-by-step explanation:

If your bathroom scale reads your mass as 65 kg with a 3% uncertainty, we can calculate the uncertainty in your mass in kilograms by multiplying the mass value by the percentage uncertainty:

Uncertainty = 65 kg × 3%

Uncertainty = 65 kg × 0.03

Uncertainty = 1.95 kg

Thus, the uncertainty in your mass measured by the bathroom scale is 1.95 kg.