QUIZ 2

Tom used micrometer to measure the length of a block;  he got the reading as 12.357mm. He found later the correct reading should be 12.827mm. He realized that he made two mistakes in using the micrometer. Can you tell what are the two mistakes?

Answer. The mistakes are:

             1. He didn't set zero for the micrometer. The zero point is 0.030mm. He should have to add 0.030mm to his measurement.

             2. He took the reading from the lower scale, but he forgot to add 0.500mm to his measurement.