The string of length 2 m is fixed at both ends. If the string vibrates in its fourth normal mode with a frequency of 500 Hz, then the waves would travel on it with a velocity of

The displacement of a wave is given by

$$y = 20\cos (\omega t + 4z)$$

The amplitude of the given wave is

If frequencies are $$(\nu-1)$$ and $$(\nu+2)$$, then find the value of beats.

The equation of a progressive wave can be given by $$y=15\sin(660\pi t-0.02\pi x)$$ cm. The frequency of the wave is