Wt=50N




         1. What is the KE at point A? Why?
         2. What is the PE at point A?
         3. What is the ME a...
1. What is heat?


2. How does thermal energy play
           a role in the Law of
       Conservation of Energy?
Roller Coaster Energy Problems
           HT=250 m
           WT=200N
                                    HT=20 m
        ...
1. Describe the energy transfers
      that occur in a light bulb.

2. Describe the energy transfers
   that occur when th...
1. Describe the energy transfers
                 in a hairdryer.

       2. What is the difference
       between renewab...
Forms           Explanation       Example


               Total energy of
Mechanical
             motion and position
   ...
Energy of moving
Electrical
                   electrons
               Energy of vibrating
Sound
                   parti...
1. Mechanical Energy
total energy of motion and position

ME=KE + PE
2. Electrical Energy
the energy of moving electrons
       Like charges repel and

              +           +

      Oppo...
The Power of Electricity
  Can be turned into other kinds of energy
  Can do work
    Hairdryer converts electric to th...
3. Nuclear Energy
  the energy of the nucleus of an atom


   Fission
   Fusion
The Sun

Giant nuclear fusion
reactor
Ultimate source of
energy for our planet
4. Chemical Energy
 the energy of rearranging atoms
 Is photosynthesis endothermic or
 exothermic?

 Is respiration endo...
5. Sound Energy
the energy of vibrating particles


-caused by
  vibrations &
  carried through
  a substance.
6. Light Energy
the vibrations of electrically charged particles




               Called PHOTONS 
The EM Spectrum
 Visible light is one portion of
  the Electromagnetic Spectrum.

 All of these waves are energy-
  fill...
Possibilities of Light
 Light rays move away from their source in straight lines.
 When they hit something, they are eithe...
Sound & Light:        Alike, but Different




        Sound                           Light
       *vibration            ...
7. Thermal Energy
the total kinetic energy of the particles

 more thermal energy
  = faster moving
  particles
 less th...
Thermal Energy vs. Heat
 Heat is the transfer of energy between
 objects that are at different
 temperatures.
Three Kinds of Heat
 Conduction Convection Radiation
  (touch)   (current)  (rays)


  Hot      Cold




        Common
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Types of energy notes

  1. 1. Wt=50N 1. What is the KE at point A? Why? 2. What is the PE at point A? 3. What is the ME at point A? 4. What is the height at point B? 5. What is the height at point C?
  2. 2. 1. What is heat? 2. How does thermal energy play a role in the Law of Conservation of Energy?
  3. 3. Roller Coaster Energy Problems HT=250 m WT=200N HT=20 m WT=200N M=20kg V=200m/s 1. Find the PE at point A. 2. Find the KE at point A. Answer the 3. Find the ME at point A. problems on 4. Find the KE at point B. the left on your sheet under the 5. What is the ME at point C? roller coaster 6. Find the PE at point C. picture. 7. Find the KE at point C.
  4. 4. 1. Describe the energy transfers that occur in a light bulb. 2. Describe the energy transfers that occur when the body is powered by food.
  5. 5. 1. Describe the energy transfers in a hairdryer. 2. What is the difference between renewable and nonrenewable energy resources?
  6. 6. Forms Explanation Example Total energy of Mechanical motion and position Total kinetic energy Thermal of particles Energy stored in Chemical rearranging atoms
  7. 7. Energy of moving Electrical electrons Energy of vibrating Sound particles Vibrations of electrically Light charged particles Energy in the nucleus of Nuclear an atom
  8. 8. 1. Mechanical Energy total energy of motion and position ME=KE + PE
  9. 9. 2. Electrical Energy the energy of moving electrons Like charges repel and + + Opposite charges attract + -
  10. 10. The Power of Electricity  Can be turned into other kinds of energy  Can do work  Hairdryer converts electric to thermal  Alarm clock converts electric to sound and light
  11. 11. 3. Nuclear Energy the energy of the nucleus of an atom  Fission  Fusion
  12. 12. The Sun Giant nuclear fusion reactor Ultimate source of energy for our planet
  13. 13. 4. Chemical Energy the energy of rearranging atoms  Is photosynthesis endothermic or exothermic?  Is respiration endothermic or exothermic?
  14. 14. 5. Sound Energy the energy of vibrating particles -caused by vibrations & carried through a substance.
  15. 15. 6. Light Energy the vibrations of electrically charged particles Called PHOTONS 
  16. 16. The EM Spectrum  Visible light is one portion of the Electromagnetic Spectrum.  All of these waves are energy- filled waves.  Insects, like bees, see shorter wavelengths than humans. What type of EM waves do they see? WATCH IT! - prism
  17. 17. Possibilities of Light Light rays move away from their source in straight lines. When they hit something, they are either Absorbed Reflected Refracted (stopped) (bounced off) (bent) WATCH IT! - Mirror
  18. 18. Sound & Light: Alike, but Different Sound Light *vibration *does NOT *needs a medium need a medium *longitudinal *transverse
  19. 19. 7. Thermal Energy the total kinetic energy of the particles  more thermal energy = faster moving particles  less thermal energy = slower moving particles
  20. 20. Thermal Energy vs. Heat Heat is the transfer of energy between objects that are at different temperatures.
  21. 21. Three Kinds of Heat Conduction Convection Radiation (touch) (current) (rays) Hot Cold Common

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