Question

C. SHORT-ANSWER QUESTIONS: Answer in a sentence or two.
1. Why are standard units used in measurements?
the principle?
3. What do you mean by 'time period of a pendulum?
4. Give an example of a periodic change related to the earth that can be used to measure time
5. On what principle are modern electronic watches based?
6. When is an object said to be in uniform motion?
2. The discovery of which principle made the accurate measurement of time possible? W​

Answer 1

Answer:

3.time period of a pendulum is the to and fro motion of it