Question

The relative uncertainty is the absolute uncertainty divided by the value of the measure-

ment. Let’s pick the antelope as our bone. It has a measured thickness of 18.3 mm with an

uncertainty of 1.0 mm; therefore, its relative uncertainty is

1.0 mm

18.3 mm = 5.5%

The student’s length (using Zach from the 10 AM lecture) was 183.2 cm with an uncertainty

of 0.1 cm. The absolute uncertainties have roughly the same value (in the case of the antelope,

it’s exactly the same) in both cases. However, the relative uncertainty in Zach’s length is

0.1 cm

183.2 cm = 0.055%

Why are the two relative uncertainties so very different? Because Zach is much longer than

the antelope’s femur is thick. They both have the same absolute uncertainty because they

both come from the same source, namely, human error in “eye-balling” a ruler or meter stick.

The relative uncertainties, however, are two orders of magnitude different!​

Answer 1

Answer:

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Explanation:

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