A guide to the inside workings of common machines and devices takes readers deep inside such items as car engines, computers, microwave ovens, and firecrackers.THREE-WAY. SWITCHES. work. In your home you probably have at least one light that is controlled by two separate switches. Whenever you flip either one of the switches, the light changes its state: If the light is on the switch turns it off, and ifanbsp;...
|Title||:||Marshall Brain's How Stuff Works|
|Publisher||:||John Wiley & Sons Incorporated - 2001-09-29|