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Types of energy notes

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  • 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. 1. What is heat? 2. How does thermal energy play a role in the Law of Conservation of Energy?
  • 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. 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. 1. Describe the energy transfers in a hairdryer. 2. What is the difference between renewable and nonrenewable energy resources?
  • 6. Forms Explanation Example Total energy of Mechanical motion and position Total kinetic energy Thermal of particles Energy stored in Chemical rearranging atoms
  • 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. 1. Mechanical Energy total energy of motion and position ME=KE + PE
  • 9. 2. Electrical Energy the energy of moving electrons Like charges repel and + + Opposite charges attract + -
  • 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. 3. Nuclear Energy the energy of the nucleus of an atom  Fission  Fusion
  • 12. The Sun Giant nuclear fusion reactor Ultimate source of energy for our planet
  • 13. 4. Chemical Energy the energy of rearranging atoms  Is photosynthesis endothermic or exothermic?  Is respiration endothermic or exothermic?
  • 14. 5. Sound Energy the energy of vibrating particles -caused by vibrations & carried through a substance.
  • 15. 6. Light Energy the vibrations of electrically charged particles Called PHOTONS 
  • 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. 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. Sound & Light: Alike, but Different Sound Light *vibration *does NOT *needs a medium need a medium *longitudinal *transverse
  • 19. 7. Thermal Energy the total kinetic energy of the particles  more thermal energy = faster moving particles  less thermal energy = slower moving particles
  • 20. Thermal Energy vs. Heat Heat is the transfer of energy between objects that are at different temperatures.
  • 21. Three Kinds of Heat Conduction Convection Radiation (touch) (current) (rays) Hot Cold Common