Answer to Question #293794 in Physics for hoppa

Question

A student sees a flash of lightning between a cloud and the Earth. The student estimates the time interval between seeing the flash and hearing the sound of thunder. The time interval is about 6.5m/s. Show that the distance to the thunder cloud is about 2 km.

Answer 1

The distance is speed (of sound, 330 m/s) multiplied by time:

$$D=vt=330·6.5=2145\text{ m}.$$