Question

The diagram shows the outer diameter of three similar rings measured by a meter scale. If the

initial and final reading on the scale is taken as 0 ± 0.2 and 6 ± 0.2, then the uncertainty in the

diameter of each ring is

A. 2.0 ± 0.02 cm

B. 2.0 ± 0.04 cm

C. 2.0 ± 0.1 cm

D. 2.0 ± 0.3 cm​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

c) 2.0 ± 0.04cm

Explanation:

Absolute uncertainties are added (±0.2) + (±0.2) = ±0.4

and the distance x determined by the difference between initial and final reading.

x1 = 0 , x2 = 6

So the difference will be

x = x2 - x1

x = 6 - 0

x = 6

So, 6 ± 0.4

Now we have to find diameter of each ring. We have 3 rings and to find the diameter of each ring we have to divided by this value by 3.

(6 ÷ 3) ± ( 0.4 ÷ 3)

2 ± 0.1

So the correct answer is c) 2.0 ± 0.1 cm