For production of beats the two sources must have

The  tension  in  piano  wire  is  10  N.  What  should  be  the  tension  in  the  wire  to  produce  a  note  of  double  the  frequency ?

The  heavenly  body  is  receding  from  earth,  such  that  the  fractional  change  in    is  1,  then  its  velocity  is

An  open  pipe  resonates  with  a  tuning  fork  of  frequency  500 Hz.  It  is  observed  that  two  successive  nodes  are  formed  at  distance 16  and  46 cm  from  the  open  end.  The  speed  of  sound  in  air  in  the  pipe  is

A  tuning  fork  A  produces  4  beats/s  with  another  tuning  fork  B  of  frequency  320  Hz.  On  filing  one  of  the  prongs  of  A,  4  beat/s  are  again  heard  when  sounded  with  the  same  fork  B . Then,  the  frequency  of  the  fork  A  before  filing  is

The velocity of sound in any gas depends upon

A hospital uses an ultrasonic scanner to locate tumours in a tissue. The operating frequency of the scanner is 4.2 MHz. The speed of sound in a tissue is 1.7 km/s. The wavelength of sound in tissue is close to

From a wave equation

the frequency of the wave is

When two tuning forks (fork 1 and fork 2) are sounded simultaneously, 4 beats per second are heard.Now some tape is attached on the prong of the fork 2.When the tuning forks are sounded again, 6 beats per second are heard.If the frequency of fork 1 is 200 Hz, then what was the original frequency of fork?

A  racing  car  moving  towards  a  cliff  sounds  its  horn.  The  driver  observe  that  the  sound  reflected  from  the  cliff  has  a  pitch  one  octave  higher  than  the  actual  sound  of  the  horn.  If    is  the  velocity  of  sound,  the  velocity  of  the  car  is