Jacob's Ladder Museum goers step beneath a motion detector and watch the electric discharge between two steel rods rise and then extinguish. The electric arc is the same as that used in very bright lights, such as florescent tubes and arc-lamp spotlights. This interactive computer program, housed in a six-foot faux Egyptian statue, reinforces the concepts explored in the Mummy's Tomb through lively multimedia lessons and quizzes. Energy can be transformed from one form to another. In a closed system, the total amount of energy is always the same.
Some energy is lost in the form of heat, making some of it unavailable for further useful work.
Matter can be converted to energy. Enormous amounts of energy can be involved in this conversion process.