Question

9. The time between a lightning flash and the following thunderclap may be
used to estimate, in kilometers, how far away a storm is. How far away is
a storm if 6 second elapse between the lightning and the thunder clap?

Use the formula d = t/3 , in seconds, between the flash and the
thunderclap.

o 18 kilometers
+ 2 kilometers
o 3 kilometers
o 9 kilometers

Is it b, 2 kilometers?

Answer 1

yes

Answer 2

Well, assume the velocity of light, about 3 * 10^8 meters/second is so high that the flash reaches you instantly.
V of sound in air is about 343 meters/second
distance = speed * time
= 343 * 6 = 2058 meters = 2.058 kilometers
or using their formula 6/3 = 2