Question

A car is travelling at \frac{v}{10}
10
v
​ and sounds horn of frequency 990 Hz. The apparent frequency heard by a police chasing the car at \frac{v}{9}
9
v
​ where vv is velocity of sound.

(1)
990 Hz

(2)
900 Hz

(3)
1000 Hz

(4)
0​

Answer 1

Answer:

The apparent frequency heard by a police chasing the car at \frac{v}{9} 9 v where vv is velocity of sound. (1) 990 Hz (2)