Question

1. A pendulum oscillates 40 times in 4 seconds find its time period and frequency?
2. The sound from a mosquito is produced when it vibrates its wings at an average rate of 500 vibrations per second. What is the time period of the vibration?
3. What is the difference between ultrasound and infrasound?
4. What is the audible range of a human ear?
5. Define - amplitude
- time period
- frequency
- pitch
6. The loudness of sound is expressed in the unit called________.

Please tell the answers...... ​

Answer 1

hope it's help uhh

refer attachment.