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Transcript
Energy •Ability to do work … “Does stuff” •Energy comes in many different forms •Energy can change from one form to another Forms of Energy Mechanical: Nuclear: Heat: Electrical: Chemical: Sound: Electromagnetic (Light): Radio: States of Energy Potential Energy: “waiting to be used” Kinetic Energy: “being used / released” Law of Conservation of Energy Energy in the universe is neither created or destroyed (there is a constant amount of energy) Energy can only be converted from one form to another (energy isn’t “lost”, it merely changes form) Energy conversions occur without loss or gain in energy (however, not all forms of energy are “useful”) Nuclear Sun: H2 light sunlight He chemical Energy of plants chemical Food energy ( carbos, lipids, etc) mechanical Energy of you moving mechanical Energy of a turbine electrical Light & heat Electricity (moving electrons) Light bulb turns on, gives off heat Nuclear Sun: H2 light sunlight He chemical Energy of plants chemical Oil (millions of years ago) Mechanical car moving
