Question

Q9. Name the following:
1. The watches and clocks used nowadays which have an electric circuit.
2. The clocks that were used to measure time, before the pendulum clock became popular.
3. The scientist who found that, a pendulum of a given length takes the same time to complete one oscillation.​

Answer 1

Answer:

1.digital watches

2.sundial clock

3.galileo gallili

Answer 2

Answer:

1. Quartz Clocks
2. Water Clocks and Jantar Mantar
3. Galileo