A source of sounds is travelling with a velocity of 40 km/hr towards an observer and emits sound of frequency 2000 Hz. If the velocity of sound is 1220 km/hr, then what is the apparent frequency heard by the observer?
A. 2068 Hz
B. 2180 Hz
C. 2000 Hz
D. 1980 Hz
Answer:A
A source of sounds is travelling with a velocity of 40 km/hr towards an observer and emits sound of frequency 2000 Hz. If the velocity of sound is 1220 km/hr, then what is the apparent frequency heard by the observer?
A. 2068 Hz B. 2180 Hz C. 2000 Hz D. 1980 Hz