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Energy Transfers and Transformations

Energy Transfers and Transformations. Thermal ( Heat ) Energy Transfers. Conduction - The transfer of heat from a warmer substance to a cooler substance through direct contact Convection - The transfer of heat in a fluid or gas through circulating currents.

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Energy Transfers and Transformations

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  1. Energy Transfers and Transformations

  2. Thermal (Heat) Energy Transfers • Conduction- The transfer of heat from a warmer substance to a cooler substance through direct contact • Convection- The transfer of heat in a fluid or gas through circulating currents. • Radiation- The transfer of energy as electromagnetic waves.

  3. Energy Conversions or Transformations • The process of changing from one energy to another. • Examples: • Potential to Kinetic- car on hill begins to roll • Mechanical to Heat- A runner radiates heat • Electrical to Mechanical- Turn on an electric fan and it spins.

  4. Keys to remember • The Laws of Conservation of Energy and Matter states that energy and matter cannot be created or destroyed. • If work is being done, thermal (heat) energy is given off. • The sun radiates electromagnetic energy into space and is either directly or indirectly the source of most of the world’s energy supplies.

  5. More to remember • When a ball is at it’s highest point it has potential energy. As a ball drops it begins to convert potential to kinetic. It is at it’s greatest amount of kinetic energy right before it hits the ground.

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