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

A metal wire of linear mass density of 9.8 gm^-1 is stretched with a tension of 10 kg wt between two rigid  supports 1 m  apart. The wire passes at its middle point between the poles of a permanent magnet and it vibrates in resonance, when carrying an alternating current of frequency v. The frequency v of the alternating source is

A wave of frequency 100 Hz is sent along a string towards a fixed end. When this wave travels back after reflection, a node is formed at a distance of 10 cm from the fixed end of the string. The speed of incident ( and reflected) wave are

The displacement of a particle varies according to the relation,

                       

A  boat  at  anchor  is  rocked  by  waves,  whose  crests  are  100 m  apart  and  velocity  is  25 ms^-1.  The  boat  bounces  up  once  in  every

A  car  sounding  its  horn  at  480  Hz  moves  towards  a  high  wall  at  a   speed  of  20 m/s,  the  frequency  of  the  reflected  sound  heard  by  the  man  sitting  in  the  car  will  be  nearest  to        

A  uniform  string  is  vibrating  with  a  fundamental  frequency  ' f '.  The  new  frequency,  if  radius  and  length  both  are  doubled,  would  be

The  plane  wave  is  described  by  the  equation

                   y  =  3  cos  (x / 4  -  10 t -  / 2).

The  ratio  of  velocity  of sound  in  hydrogen  and oxygen  at  STP  is.

The transverse displacement y(x,t) of a wave on a string  is given by

                           .