Energy

• Energy


  Capacity to do work
• Potential energy


  Attributed to mass and position
• Unit for potential energy

  newton-meter or joule
• Kinetic energy


  the energy an object has in motion
• Kinetic energy formula

  (mass x velocity^2)/2
• Values/unit for Kinetic energy

  kg.m/s^2 or joule
• What energy is heat?

  Thermal energy
• Thermal energy is the result of?

  friction
• Nuclear energy


  energy released during nuclear fission and fusion
• Electromagnetic energy?


  found in electric charges moving along magnetic fields
• Example of electromagnetic energy

  light
• Chemical energy?


  energy stored in chemical substances that is released when they undergo transformation.
• How can the sun's energy be converted into electrical energy?

  through the solar devices called photovoltaic cells.
• Way of generating electricity

  burning of coal
• highest rank of coal?

  anthracite