Question

A bat emits a series of high-frequency sound pulses as it approaches a moth. The pulses are approximately 70.0 ms apart and each is about 3.0 ms long. How far away can the moth be detected by the bat, so that the echo from one chirp returns before the next chirp is emitted?

Answer 1

The moth can be detected by the bat when it is about 21 meters away.

Step-by-step explanation:

This is because the sound waves travel at about 340 meters per second, so it takes about 70 milliseconds for the sound waves to travel from the bat to the moth and back again.