The frequency of sinusoidal wave, 0.40 cos (2000t + 0.80) would be:

The speed of a wave in a medium is 760 m/s. If 3600 waves are passing through a point in the medium in 2 min, then their wavelength is:

Which one of the following statements is true?

The phase difference between two waves, represented by

where x is expressed in metre and t is expressed in second, is approximately:

A cylindrical resonance tube open at both ends, has a fundamental frequency ƒ, in air. If half of the length is dipped vertically in water, the fundamental frequency of the air column will be:

A wave in a string has an amplitude of 2cm. The wave travels in the +ve direction of x axis with a speed of 128 ms^-1 and it is noted that 5 complete waves fit in 4 m length of the string. The equation describing the wave is:

The velocity of sound in any gas depends upon:

A standing wave having 3 nodes and 2 anti node is formed between two atoms having a distance 1.21Å between them. The wavelength of the standing 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:

The time of reverberation of a room A is one second. What will be the time (in second) of reverberation of a room, having all the dimensions double of those of room A?