An experimental rocket car moves along a straight track at a constant speed of 900 m/s. The car passes a group

Question

of officials and travels a distance of 270 m before exploding. If the officials hear the sound of the explosion 1.1 sec after the car passes their position , what is the speed of sound that day?

Answer 1

The speed of sound is independent of the speed of the sound source. So c = x/t = 270/1.1 m/s.