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### 60 Cards in this Set

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 ability to do work energy work is a transfer of energy work and energy is measured in joules energy of motion kinetic the kinetic energy if any moving object depends upon its mass and speed formula for kinetic energy KE=1/2mv(squared) energy that is stored as a result of position or shape potential energy potential energy taht depends upon its heigh gravitational potential energy an object's gravitational potential energy depends on mass, height and the acceleration due to gravity potential energy formula pe=mgh potential energy of an object that is stretched or compressed elastic the major forms of energy are mechanical, thermal, chemical, electrical, electromagnetic, and nuclear sum of an object's potential and kinetic energy mechanical energy energy associated with the motion and position of everyday objects mechanical total potential and kinetic energy of the microscopic particles thermal energy stored in the chemical bonds in compounds chemical energy associated with electric charges electrical form of energy that traveles through space in the form of waves electromagnetic energy stored in atomic nuclei nuclear chinese discover a new star 1054 greatest concentration of energy in universe supernova conservatoin of energy is the underlaying law of the universe energy cannot be created or destroyed process that releases energy by splitting nuclei nuclear fission releases energy when less massive nuclei combine to form a more massive nucleus nuclear fusion conservation of mechanical energy (KE+PE)beginning= (KE+PE)=end einstein's equations says that energy and mass are equal and can be converted into eachother energy is released as matter is destroyed matter can be created from energy speed of light 3.0 X 10 ^8 in nuclear fission and fusion large amounts of energy are released by the destruction of very small amounts of matter mass and energy together are always conserved exist in limited quantities and once used cannot be replaced except over a course of millions of years nonrenewable energy resources nonrenewable energy resources include oil, natural gas, coal and uranium oil, natural gas, ands coal because they were formed underground from the remains of once living organisms fossil feuls canbe replaced in a relatively short period of time renewable energy resources renewable energy resources include hydroelectric, solar, geothermal, wind, biomass and possibly in the future nuclear fusion energy obtained from flowing water hydroelectric sunlight that's converted into usable energy solar solar cells photovoltaic heat beneath earth's surface geothermal maximum kinetic energyis when you go the fastest chemical energy stored in living things biomass converted directly into thermal energy biomass generates electricity by reacting hydrogen with oxygen hydrogen fuel cell energy resources can be conserved by reducing energy needs and by increasing hte effieciency of energy use finding ways to use less energy or to use energy more efficiently energy conservation energy can be converted from one form to another process of changing energy from one form to another energy conversion the law of conservation of energy states that energy cannot be created or destroyed the gravitational potential energy of an object is converted to the kinetic energy of motion as the object falls weight swinging back and forth from a strign pendulum kinetic and potential energy undergo constant conversion as the pendulum swings when friction can be ignored an object's mechanical energy doesn't change mechanical ME=PE+KE total energy remains unchanged even though many conversions can occur i gram of TNT 2931 J the square root of velocity equals 2(KE)/ m velocity e energy m mass