Energy Transfers and Transformations

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Energy Transfers and Transformations - PowerPoint PPT Presentation

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

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.
• Radiation- The transfer of energy as electromagnetic waves.
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
• 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
• 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.