armagedon (Mariana Lover): A flashlight is lighted by the use of dry cells. Taken an old flashlight apart. Study all its parts,look for the electric lamp. Where is the battery? This is usually made up of two 0r more dry cells. This battery produces the electric current that makes the tiny electric lamp light. Where is the connection between the battery and the electric lamp? The lamp lights because the tiny wire in it resist the flow of electric current. You have learned that when electricity flows through a wire that *
24-08-09 - 01:01:19

armagedon (Mariana Lover): Has resistance the wire gives off light and heat. Making your own flashlight you will need a piece of copper wire, a tiny electric lamp, and two rubber bands. *
24-08-09 - 01:08:19

armagedon (Mariana Lover): MAKE A BULGAR ALARM-(a wooden box with a sliding cover,an electric bell,a dry cell,two strips of copper 1/2 in. by 3 in.,insulated wire,tacks)- let the box stand on end.The cover of the box represents a window.Then bend back one end of each of the copper strips and pound the folds to make them flat.Fasten one of the strips of copper halfway up one side of the box.This should be in such a way that it extends about an inch beyond the sliding cover. *
24-08-09 - 01:16:51

armagedon (Mariana Lover): Tack the second strip to the sliding cover near the bottom in such a way that one end projects just far enough to slide along against the first strip when the "window" is raised.Connect the cell and bell to the strips of copper.The bell will ring whenever the "window" is raised far enough for the two strips of copper to come together. *
24-08-09 - 01:23:18