Physics
Grade-9
Easy
Question
A simple pendulum performs 18 oscillations per second; the mechanical wave produced by it are:
- Ultrasonic wave
- Sound wave
- Infrasonic wave
- None of these
Hint:
Frequency is the number of occurrences of a repeating event per unit of time
The correct answer is: Infrasonic wave
Thus, it is a sound wave (infrasonic)
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