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Define crest and trough.

In a transverse wave the distance between a crest and neighbouring trough at the same instant is 4.0 cm and the distance between a crest and trought at the same place is 1.0cm. The next crest appears at the same place after a time interval of 0.4s. The maximum speed of the vibrating particles in the medium is:

(a) Explain the terms 'crests' and 'troughs' of a wave ? What type of waves consist of crests and troughs? (b) The flash of a gun is seen by a man 3 seconds before the sound is heard. Calculate the distance of the gun from the man (speed of sound in air is 332 m/s).

(a) Explain the terms 'crests' and 'troughs' of a wave? What type of waves consist of crests and troughs? (b) The flash of a gun is seen by a man 3 seconds before the sound is heard. Calculate the distance of the gun from the man (Speed of sound in air is 332m//s ).

Complete each of the following sentences by choosing the correct term from the word bank. loudness, echoes, pitch, noise, solids, sound quality, vibrations, wavelength frequency, wave, vacuum, amplitude, lesser, infrasonics, ultrasonics The distance between any two successive crests or compressions in a longitudinal wave is called _____________.