Pmm

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Pmm

  1. 1. PMM Perpetual Motion Machine Sam
  2. 5. It’s not a dream? <ul><li>Are you kidddddddding me? </li></ul>
  3. 6. I N FACT…
  4. 7. History <ul><li>People have dreamed about this since 1200. </li></ul>In 1500 Leonardo Da Vinci In 1670 John Wilkins
  5. 8. The perpetual machine of the first kind Violates the Law of Conservation of Energy
  6. 9. Laws of conservation of energy <ul><li>The total amount of energy in an isolated system remains constant. A consequence of this law is that energy cannot be created or destroyed. </li></ul>
  7. 10. The perpetual machine of the second kind ??? Could they achieve?
  8. 11. Comparison <ul><li>First kind </li></ul><ul><li>Produces energy from NOTHING, giving the user unlimited ‘free’ energy. </li></ul><ul><li>Violates the Law of Conservation of Energy </li></ul><ul><li>Second kind </li></ul><ul><li>A machine which spontaneously converts thermal energy into mechanical work. </li></ul><ul><li>This need not violate the law of conservation of energy! </li></ul>
  9. 12. W OULD THEY SUCCEED?
  10. 13. Maxwell’s demon
  11. 14. The perpetual machine of the second kind Violates the Second Law of Thermodynamics
  12. 15. The second law of thermodynamics <ul><li>Initially: In a system, a process that occurs will tend to increase the total entropy of the universe. </li></ul><ul><li>Clausius statement: Heat generally cannot spontaneously flow from a material at lower temperature to a material at higher temperature. </li></ul><ul><li>Kelvin statement: It is impossible to convert heat completely into work. </li></ul>
  13. 16. People just can’t stop dreaming… <ul><li>You are all lying! </li></ul>
  14. 17. N owadays…
  15. 18. What can we learn? <ul><li>The laws of nature can’t be broken, and we all have to obey the laws. </li></ul><ul><li>Science is useful. </li></ul><ul><li>Don’t FIGHT against the NATURE ! </li></ul>
  16. 19. And we could learn <ul><li>Sometimes </li></ul><ul><li>MISTAKE </li></ul><ul><li>can make </li></ul><ul><li>PROGRESS </li></ul>
  17. 20. T hat’s all. Thank you and thanks to &

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