Question

Using train horn echo to measure distance?

Answer 1

ka wo IV so is wo is en is aaj ghi di di is wo ye

Answer 2

Answer:

Here's the simplest statement of it. On a windless day, a train is traveling along a flat western plain on a straight track, blowing its horn once a second. Nearby is a tall mesa, making the train horn echo. You are close enough to hear the train and the echo, and you decide to record it for future study.