Available Answers

1. 1.

   What is the need for measurement of time?

2. 2.

   Convert speed of 15 m/s into km/h.

3. 3.

   Define time period.

4. 4.

   What do you understand by measurement?

5. 5.

   What is an oscillation?

6. 6.

   On what principle a sundial work? What is the drawback of a sundial?