A car covers a distance of 250 m in 13 s the average speed i

A car covers a distance of 250 m in 13 s; the average speed is calculated to the 10 decimal places of the calculator as 19.230 769 23 m s^-1. Explain why it is incorrect to believe all of the significant figures of the quoted speed.

Solution

Zeros appearing anywhere between two non-zero digits are significant. Example: 101.1203 has seven significant figures: 1, 0, 1, 1, 2, 0 and 3. in the given speed there is 10 significant digits but after decimal it is 8.we have to calculate upto 10 decimal places.....so the exact solution is 19.2307962307.