Forms of Energy & Energy Conversions

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Presentation transcript:

Forms of Energy & Energy Conversions

Forms of Energy Mechanical Energy: Related to motion of objects Ex : moving machine parts Windmill Engine piston

Thermal Energy Related to heat Thermal Energy = total KE and PE of all particles in an object Particles in matter are constantly moving

Chemical Energy (type of potential energy) Energy stored in chemical bonds within a substance Ex: Gas, food, human body, battery

Elastic Energy (type of potential energy) Energy stored in a compressed material Example: rubber band, spring

Electrical Energy Energy of Electric Charges

Electromagnetic Energy Energy traveling in the form of waves X-rays Visible light

Nuclear Energy Energy stored in nucleus of an atom Nuclear Power plants convert nuclear energy to electricity

Energy conversions Law of conservation of energy: Energy cannot be created or destroyed, only converted from one form to another

Impact crater in Arizona formed within past 20 yrs Large KE of meteor converted to large amount of thermal energy vaporizing everything in Close proximity

Energy conversions Light bulb : converts electrical into thermal and electromagnetic energy Compressed Spring: converts potential to kinetic Burning wood: stored chemical energy converted to thermal and electromagnetic

If friction is ignored total mechanical energy will remain constant Energy Conversion in a Pendulum If friction is ignored total mechanical energy will remain constant (KE + PE) start = (KE + PE)end Pendulum would swing forever!!!

Viewing a Pendulum Pendulum Energy Conversion

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