Challenge Question #1

Cheryll Douglas (
Tue, 18 Mar 1997 12:08:48 -0600

Sonar is a high frecuency sound given off by some animals to find food or
objects in front of them. When the sound hits an object it bounces back to
the animal. When it reaches the animal the animal mesures the length of
time it took the sound to get back and that tells it how far away the
object is.

Dr.Howard School Champaign Illinois.

Cheryll Douglas
Dr. Howard Elementary School
Champaign, Il 61821