Question

Q1.A tuning fork vibrates 2250 times in 3 seconds. Calculate its frequency.
Q 2.A sound wave travelling in water at 1440 ms-1 has a frequency of 160Hz. Determine the distance between two
consecutive crests of the wave.
Q 3.The speed of sound is 330m/s in air & 1650 m/s in water. It takes 2s for a sound to travel a certain distance in air. Find:
a. the distance
b. the time taken if the same distance was covered by the source in water.
Q 4.A certain wave has a time period of 10s and velocity of 15m/s. Find the :
a. Wavelength
b. Distance travelled by the wave in one minute.
Q 5.A wave has an amplitude of 8m and a wavelength of 2m. Draw a displacement-distance graph for this wave, showing
two vibrations.

Answer 1

Answer:

Explanation: 1. The frequency (f) of a wave is the number of full waveforms generated per second. This is the same as the number of repetitions per second or the number of oscillations per second.

Time Period (T) is the number of seconds per waveform or the number of seconds per oscillation. It is clear that frequency and period are reciprocals.

In this case, A tuning fork's tongs vibrate 250 times in 3sec

That is, the frequency is given as f= 250/3 = 83.3