Physics

A hiker sees a lightning flash, 13.0 s later he hears the sound of the thunder.

Recalling from his study of physics that the speed of sound in air is approximately 1/3 km/s he estimates that the distance to where the lightning flash occurred is approximately

a. 4.33 km
b. 9.33 km
c. 14.3 km
d. 44.3 km

1. Henry

d = Vt = 0.3333km/s * 13s = 4.33km.

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