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Published byBasil Freeman Modified over 9 years ago
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Energy Transformations and Conservation
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Review What are the 2 types of energy? What are the 6 forms of energy? 1 Form + 5 other forms. Why?
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Overview Energy can be transformed from one form of energy into other forms. Conservation of energy/First Law of Thermodynamics. Energy and Matter. Source of all Energy.
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Single Transformation Sometimes in order to do work one form of energy must be transformed into another. Ex. A toaster transforms electric energy into thermal energy. Ex. A cell phone transforms electric energy into electromagnetic energy to make a call. Ex. Your body transforms chemical energy in food into mechanical energy to move your muscles.
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Multiple transformations Often times a series of energy transformations is needed to do work. Ex. Striking a match ME Thermal Releases Chemical Thermal + Electromagnetic. Car Electrical Thermal Releases chemical Thermal ME + Electrical
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Kinetic and Potential Transformations Energy is constantly changing from Kinetic to Potential and back to Kinetic. Ex. Ball bouncing Ex. Pendulum swinging
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Conservation of Energy Energy cannot be created or destroyed. The energy is just transformed into other forms. Ex. Spinning ball/spinning top. Why does the ball or top stop spinning? Friction is the source of a lot of lost energy. It is not destroyed just converted into heat.
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Energy and Matter What is conservation of Matter/Mass? Mass cannot be created or destroyed and neither can energy. Albert Einstein’s theory of relativity – E=mc 2 E = energy M= mass C = speed of light (constant does not change)
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Energy and Matter What does it mean? A small amount of mass can be converted into a large amount of energy. This is how nuclear energy works.
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