Pendulum Clock

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I had to make this presentation. Lame

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Pendulum Clock

  1. 1. Pendulum Clock<br />By: Junho, Dh<br />
  2. 2. What is this invention<br /><ul><li>Pendulum Clock
  3. 3. Pendulum
  4. 4. 16th century</li></li></ul><li>History<br />1582 – Galileo fixed period <br />1656- Dutch Scientist Christian Huygens<br />1880s- The grandfather clock<br />1921- Designs improve<br />
  5. 5. Purpose<br />Save time<br />Keep promise/meeting<br />Accurate time<br />
  6. 6. How it works?<br />Swing back and forth<br />Time base – gears<br />Small gear rotate<br />Each gear, face of the clock <br />
  7. 7. How simple machine…<br />Controlled force<br />Self working<br />
  8. 8. One World<br />Sociable <br />Keep Meetings and promises<br />Friend ship<br />
  9. 9. Advantages<br />Sociable<br />Keep time well<br />Accurate time<br />
  10. 10. Disadvantage <br />Need battery/ resource<br />When time is not set<br />
  11. 11. Bibliography<br /><ul><li>History of the pendulum clock." Grandfather clocks info: Facts about long case clocks. grandfather clocks guide, n.d. Web. 20 Apr. 2011. http://www.grandfather-clocks-guide.info/history-of-the-pendulumqs-clock.html.
  12. 12. Huygen’s principle. Cambridge Physics Huygen’s principle. http://www-outreach.phy.cam.ac.uk/camphy/xraydiffraction/xraydiffraction4_1.htm. April 19th.
  13. 13. Katzenback, Jason. Are you Blogging with Purpose? (If not 5 ways to fix it).Copyblogger Are you blogging with purpose? (If not, 5 ways to fix it) http://www.copyblogger.com/purposeful-blogging/. April 19, 2011</li></ul>- Lilley,Stephen. How a clocks work. EhowHow a clocks work<br /><ul><li>Pendulum Clock. Wikipedia Pendulum Clock</li></ul>http://en.wikipedia.org/wiki/Pendulum_clock<br />-Simple machine. Science Learning simple machine. http://www.fi.edu/qa97/spotlight3/spotlight3.html. April 19, 2011<br /><ul><li>U+2212 MINUS SIGN. Decodeunicode U+2212 MINUS SIGN. http://www.decodeunicode.org/u+2212. April 19, 2011</li></li></ul><li>THANK YOU<br />

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