Today I spent another 30 minutes going through a short story of children which is illustrated ny German Torres.
A mystery about sound by Lynda Beauregard, where it explains how the sound vibrates that moves in wave.
Souns how it was experimented with the pitch or the frequency of the sound wave.
How to calculate thunders and lighting 1125 x 5 = 5625 feet which means a mile away where the lighting struck on the ground.
Very nice and informative book.
If you have time read the book.
Wrote by rksandhu