Question

For the following calculation, give the answer to the correct number of significant figures.

Answer 1

Given,

`\frac{(71.359\text{ m}-71.357\text{ m})}{(3.2\text{ s}*3.67\text{ s})}`

When calculating using the numbers with the different number of significant digits, the final answer should contain the same number of significant digits as the number with the least number of significant digits.

On simplifying the above equation,

`(0.002)/(12)`

In the above equation, the numerator (0.002) has only one significant digit.

Therefore the answer will have one significant digit

On further simplifying,

`=2*10^(-4)`

Thus the correct answer is 2×10⁻⁴