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Types of Energy

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Types of Energy

  1. 1. Energy The forms and Nature of…
  2. 2. What is Energy? The Ability to do work or cause change. Produce warmth Produce Light Produce Sound Produce Movement Produce Growth Powers Technology
  3. 3. Nature of Energy • Energy is all around you. • You hear energy as sound, you see energy as light, • you can feel energy in wind. • Living organisms need energy for growth • and movement. • You use energy when you hit a tennis ball, • compress a spring, or lift a grocery bag. • Energy is the ability to do work
  4. 4. States or Classes of Energy Potential Kinetic Stored energy or energy of position Gravitational, stored mechanical, Nuclear, chemical Energy of Motion Motion, Electrical, Sound, Radiant, Thermal
  5. 5. What is Potential Energy? oEnergy that is stored and waiting to be used later
  6. 6. What is Gravitational Potential Energy? o Potential energy due to an object’s position o P.E. = mass x height x gravity Don’t look down, Rover! Good boy!
  7. 7. Changes in gravitational potential energy For an object in Earth’s gravitational field: If an object falls will it gain or lose gravitational potential energy? If an object moves up will it gain or lose gravitational potential energy?
  8. 8. GPE=Wh We can calculate the change in gravitational potential energy (GPE) for a moving object using the formula below: Change in GPE = Weight x Change in height GPE=Wh GPE measured in Joules (J) Weight measured in Newtons (N) Height measured in Metres (m)
  9. 9. Potential Energy •Stored Mechanical •Chemical •Nuclear Energy
  10. 10. What is Kinetic Energy? o Energy an object has due to its motion o K.E. = .5(mass x speed2 )
  11. 11. KE=½m(v)² We can calculate the kinetic energy (KE) for a moving object using the formula below: Kinetic Energy = ½x mass x(velocity)2 KE=½mv2 KE measured in Joules (J) Mass measured in Kilograms (Kg) Velocity measured in Metres per second (ms)
  12. 12. Forms of Energy •Mechanical •Thermal •Chemical Electrical Electromagnetic Nuclear Energy can be transferred, or converted, from one form to another!
  13. 13. What is Mechanical Energy? o Energy due to an object’s motion (kinetic) or position (potential). The bowling ball has mechanical energy. When the ball strikes the pins, mechanical energy is transferred to the pins!
  14. 14. Mechanical Energy •Energy of motion or position •Sound, wind, waterfall, compressed spring •KE or PE •Not 100% efficient much lost to heat
  15. 15. Examples of Mechanical Energy
  16. 16. What is Electromagnetic Energy? o Light energy o Includes energy from gamma rays, xrays, ultraviolet rays, visible light, infrared rays, microwave and radio bands
  17. 17. Electromagnetic Energy •Light is a form of electromagnetic energy. •Each color of light (Roy G Bv) represents a different amount of electromagnetic energy. •energy that travels in waves; have electrical and magnetic properties •Electromagnetic Energy is also carried by X-rays, radio waves, and laser light.
  18. 18. What is Electrical Energy? o Energy caused by the movement of electrons o Easily transported through power lines and converted into other forms of energy
  19. 19. Electrical Energy •Moving electrical charges that produce electricity and energy. Static Shock Lightening Computers/TVs/ Radios Lights  from batteries, power lines, lightning
  20. 20. What is Chemical Energy? o Energy that is available for release from chemical reactions. The chemical bonds in a matchstick store energy that is transformed into thermal energy when the match is struck.
  21. 21. Chemical Energy •Energy stored by chemical bonds in an object. •When bonds are broken energy is released. •PE only •gasoline, food, coal, wood
  22. 22. Examples of Chemical Energy
  23. 23. Heat/Thermal Energy •The internal motion of an objects atoms and molecules. •Measured by temperature. •The faster particles move, the more thermal energy they have. •KE only
  24. 24. What is Thermal Energy? o Heat energy o The heat energy of an object determines how active its atoms are. A hot object is one whose atoms and molecules are excited and show rapid movement. A cooler object's molecules and atoms will show less movement.
  25. 25. Heat Energy • The internal motion of the atoms is called heat energy, because moving particles produce heat. • Heat energy can be produced by friction. • Heat energy causes changes in temperature and phase of any form of matter.
  26. 26. Nuclear Power • Energy stored in the nucleus of an atom RELEASED by fission or fusion Sun Stars Nuclear Power Plant
  27. 27. Nuclear Energy •Energy stored in center(nucleus) of an atom •Fission (breaking apart) •Fusion (forming) •The sun •Most powerful •The nucleus of an atom is the source of nuclear energy. •PE only
  28. 28. QUIZ TIME! What type of energy cooks food in a microwave oven? ELECTROMAGNETIC ENERGY What type of energy is the spinning plate inside of a microwave oven? MECHANICAL ENERGY
  29. 29. QUIZ TIME! Electrical energy is transported to your house through power lines. When you plug an electric fan to a power outlet, electrical energy is transform into what type of energy? MECHANICAL ENERGY
  30. 30. QUIZ TIME! What energy transformation occurs when an electric lamp is turned on? ELECTRICAL ENERGY ↓ ELECTROMAGNETIC ENERGY
  31. 31. What types of energy are shown below? Mechanical and Thermal Energy
  32. 32. What type of energy is shown below? Chemical Energy
  33. 33. What types of energy are shown below? Electrical, Mechanical and Electromagnetic Energy
  34. 34. What type of energy is shown below? Chemical Energy (yummy)
  35. 35. What type of energy is shown below? Thermal Energy
  36. 36. • Draw a flow map showing the flow of energy transformations in a SYSTEM from starting vehicle to driving. You should have 5 different types of energy.
  37. 37. Energy Transfer Chemical Electrical Electrical Electrical Sound (mechanical) Light (Electromagnetic) Thermal Mechanical