Question

4. The frequency of a sound is 2.8 KHz. The vibrating body is then
(1 Point)
Taking 28 seconds to complete one vibration
Taking 2800 seconds to complete one vibration
Completing 2800 vibrations in one second
D
Completing 28 wibrations in one second
5. An instrument makes a sound which is audible to the human ear​

Answer 1

Answer:

sorry I didn't know the answer

Answer 2

Answer:

1500 second to complete one vibration

Explanation because one kHz is ,-----------1000second