Two waves of same frequency and intensity superimpose on each other in opposite phases.  After the superposition, the intensity and frequency of waves will

A 5.5 length of string has a mass of 0. 035 kg.  If the tension in the string is 77 N, the speed of a wave on the string is

Standing waves are produced in a 10 m long stretched string.  If the string vibrates in 5 segments and the wave velocity is 20 m/s, the 5 segments and the wave velocity is 20 m/s, the frequency is

A standing wave having 3 nodes and 2 antinode is formed between two atoms having a distance 1.21   between them,  The wavelength of the standing wave is

The equation of a wave is given by

where x and y are in metre and t in second, then velocity of wave is

A closed organ pipe (closed at one end) is excited to support the third overtone.  It is found that air in the pipe has

Two vibrating tuning forks produce progressive waves given by   

Number of beats produced per minute is

From a wave equation

the frequency of the wave is

A transverse wave propagating along x-axis is represented by 

Where x is in metre and t is in second.  The speed of the wave is

Two strings A and B have lengths l_A and l_B and carry masses M_A and M_B at their lower ends, the upper ends being supported by rigid supports.  If n_A and n_B are the frequencies of their vibrations and n_A = 2n_B, then