Question

III. Give reason for the following 1. In the laboratory, we use a physical balance to measure the mass of a object 2. We use a stopwatch in an athletic meet to measure time.​

Answer 1

Answer:

1.Physical balance is mostly used to compare the weights or masses of two objects.

2. In order to measure the time in an athletics meet, stopwatches are used. It conveys the total time taken by the athletes to complete the race. In case it is not available, table clock or the wrist watches are used as a substitute for measuring the approximate time taken by them.