Z Is for Zoom: A Scientific Alphabet of How Things Go, from Alternator to Zerk Fitting - Baby University

Children love books about trucks, cars, and things that go vroom, but many wonder how all these things work From combustion engine to electric motor, ignition to nitro, and everything in between, babies and grownups will learn what makes their favorite vehicles move A is for Alternator A cars battery is charged by the alternator. Kinetic energy produced by the cars engine is converted to a direct current by the alternator. That direct current is then used to charge the battery. Finally, the battery is able to start the car