Q9 of 97 Page 322

Velocity of sound in air is 332 m s−1. Its velocity in vacuum will be

Sound is a mechanical which means that it requires a medium to travel. Thus, its velocity is a


vacuum, a place with no medium is a meaningless statement.

More from this chapter

All 97 →
7

Two string A and B, made of same material, are stretched by same tension. The radius of string A is double of the radius of B. A transverse wave travels on A with speed υA and on B with speed υB. The ratio υA/υB is

 8

Both the strings, shown in figure (15.Q1), are made of same material and have same cross section. The pulleys are light. The wave speed of a transverse wave in the string AB is υ1 and in CD it is υ2. Then υ1/υ2 is

 10

A wave pulse, travelling on a two-piece string, gets partially reflected are partially transmitted at the junction. The reflection wave is inverted in shape as compared to the incident one. If the incident wave has wavelength λ and the transmitted wave λ’,

 11

Two waves represented by y = a sin(ωt − kx) and y = a cos (ωt − kx) are superposed. The resultant wave will have an amplitude