Question

1 The instrument used to measure speed
2 The instrument used to measure distance
3 The to and fro motion of a simple pendulum
4 The metallic ball in the simple pendulum.
5 One billionth of a second
6 The path of electric current
7 A safety device used in electric circuit
8 The coil of wire in an electric heater​

Answer 1

1. Speedometer
2. Odometer
3. Oscillation
4. Bob
5. Nanosecond
6. Circuit
7. Fuse
8. Heating element