A sound source and an audience both are approaching to each other velocity `C/10` find the percentage of relative increment or decrement of frequency of sound [velocity of sound is air, c]

If v= velocity of sound and V = velocity of air in the diretion of sound, then the resultant velocity of sound will be----

Find out the relation between R.M.S velocity and velocity of sound within that media.

A train is moving with a uniform speed of 33 m/s and an observer is approaching the train with the same speed. If the train blows a whistle of frequency 1000 Hz and the velocity of sound is 333 m/s, then the apparent frequency of the sound that the observer hears is