A source of sound is travelling with a velocity 40 km/h towards an observer and emits a sound of frequency 2000 Hz. If the velocity of sound is 1220 km/h, then the apparent frequency heard by the observer is. …………………

A source of sound is travelling with a velocity 40 km/h towards an obs

1.	A source of sound is travelling with a velocity 40 km/h towards an observer and emits a sound of frequency 2000 Hz. If the velocity of sound is 1220 km/h, then the apparent frequency heard by the observer is. …………………
Answer» Solution :APPARENT FREQUENCY heard by the observer. `N.=((v)/(v-v_(s)))n` `=((339)/(339-11.1))xx2000=1.03385xx200` n.=2068 Hz Data: v=1220 km/h (or) `339ms^(-1)` `v_(s)=40km//h` or `11.ms^(-1)` n=2000Hz