In this part...
T
he chapters in this part all deal with things that
vibrate in some fashion, from sound waves in the air
to a furniture cushion. Intrigued? Here’s what’s covered:Radio waves form the basis of the remote control unit
that you use to manage a character we call Sensitive Sam
(Chapter 13).Oscillating signals sent by a metal detector
(Chapter 12) produce a corresponding oscillating signal
in metal, helping you identify when you’ve hit gold (or
more likely, iron). Finally, our Couch Pet-ato (Chapter 14)
responds to the vibration that occurs when your cute
kitty jumps up on your couch in your absence, producing
a sound to scare off the little dear.18_009683 pt04.qxp 6/22/06 9:36 PM Page 280