Answer:
I think this is correct
Explanation:
frequency definition is the number of complete waves produced per second so if you have 100Hz, it is 100 complete waves produced in 1 seconds, and when it says vibrates 300 times in 3 seconds, you find for 1 second
vibrations is most probably the frequency in one second
1 second -----100 vibrations
thus the frequency = 100 Hz
hope this helps!!!!!!
