Question

An experimental rocket car moves along a straight track at a constant speed of 90.0 m/s. The car passes a group of officials, travels a distance of 270.0 m and then explodes. If the officials hear the sound of the explosion 3.8 s after the car passes their position, what is the speed of sound on that day?

Answer 1

71.052 m/s

Step-by-step explanation:

It took 3.8 seconds for sound to travel a distance of 270 m

Speed = Distance / Time

`\text{Speed}=(270)/(3.8)\\\Rightarrow \text{Speed}=71.052\ m/s`

Assuming that the officials do not move and are standing at the same place the speed of sound that day was 71.052 m/s.

The speed of sound in air depends on the temperature of the air. Lower the temperature lower is the speed of sound in the medium.