Question

How close does the lighting have to strike for you to hear it 2.5 s after it strikes?

Answer 1

Light speed travels at a very high speed and the lighting is seen instant as it occurs.

The distance is calculated using

the following formula

$Distance=velocity*time$

$Velocity=345m/s$

$Time=2.5s$

Plugging in the values

$D=345*2.5 \newline distance=862.5 m$

Distance in kilometers is $0.8625km$