K.C.S.E Physics Q & A - MODEL 1996PP1QN28

K.C.S.E Physics Q & A - MODEL 1996PP1QN28

 An observer A is in a moving vehicle with a siren on while an observer B is stationary on the side of the road. State the difference between the sound heard by A and B as the vehicle approaches B at a high constant speed 

ANSWERS

• A hears a constant frequency produced by the  siren/ same roundness/ pitch B hears a frequency that increases as the vehicle approaches/ sound of  increasing loudness/ higher sound