Question 68564
<pre><font size = 4><b>
If you are 2 miles away from a lighting flash,
how long will it take the sound of thunder to 
reach you?

Under normal atmospheric conditions, the speed 
of sound is 770 miles/hour.

{{{Time = (Distance)/(Speed)}}}

{{{Time = 2/770}}} hours

To change hours to minutes we multiply by 60

{{{Time = (2/770)(60)}}} minutes

To change minutes to seconds we multiply by 60

{{{Time = (2/770)(60)(60)}}}

Punch that into a calculator and get:

Time = 9.350649351 seconds 

or about 9.4 seconds.

Edwin</pre>