A car is travelling at 30m/s in still air. the frequency of the siren on the car is 600hz. The velocity of sound in still air is 330 m/s. what is the wavelength of the sound waves
a)directly in front of the car
b)directly behind the car
What is the frequency of the sound heard by a stationary observer
c)directly in front of the car
d)directly behind the car
The Attempt at a Solution
Im not really sure where to start if someone could point me in the right direction.