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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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Presentation Transcript
thermal heat energy transfers
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.
energy conversions or transformations
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.
keys to remember
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.
more to remember
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.