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TIME MEASUREMENTS

TIME MEASUREMENTS. Where is timing very important? What are the different ways we measure time?. Scientific Method. History of Timing. Some societies do not need the minute and second. Some societies go to the thousandth of a second and round to hundreths.

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TIME MEASUREMENTS

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  1. TIME MEASUREMENTS Where is timing very important? What are the different ways we measure time? Scientific Method

  2. History of Timing • Some societies do not need the minute and second. • Some societies go to the thousandth of a second and round to hundreths. • Galileo is said to have used his pulse to time a swinging chandelier in a cathedral. • Galileo is also said to have made a water clock. (1564-1642)

  3. Galileo's Water Clock Galileo's water clock worked like a stopwatch. To start the clock, he allowed water to flow into a container. To stop the clock, he stopped the flow of water. To reset the clock he emptied the container. By weighing the amounts of water in the container, he could then compare the times it took the ball to travel each distance. For example, if twice as much water (in weight) filled the container, he knew that the time measured was twice as long. (2)

  4. Chinese Incense Alarm Clock

  5. Hour Glass Sumerian Sundial Hour Glass Hour Glass Hour Glass Hour Glass Hour Glass

  6. Egyptian Shadow Clock

  7. 13 Water Clocks Existed by 30 BC Oldest Clock found in a tomb of Amenhotep I, buried around 1500 B.C.

  8. Timing Water EventsPhelps 7th Gold Medal: 100 m Butterfly Omega finally releases Phelps photo sequence. Yahoo News. 8/24/2008 By ANDREW DAMPF, AP Sports Writer (AP Photo/Omega) 2008 Olympics is Beijing

  9. Photo Finishes Don’t Count Here Phelps left in the 100-meter butterfly with Cavic Left

  10. The Touch Pad Determines the Gold Medal Winner in Swimming. Phelps Cavic

  11. Phelps Has to Put 6.6 lbs of pressure on the touch pad first. Phelps 50.58 seconds Calvic 50.59 seconds

  12. Time at SanLee • Bells • Seconds • Computer • Stopwatch • Counting: 1001, 1002,1003,1004

  13. Citations • http://sports.yahoo.com/olympics/beijing/swimming/news?slug=ap-swm-phelpsphotofinish&prov=ap&type=lgns • (2)http://www.pbs.org/wgbh/nova/galileo/expe_inpl_2.html • Clock http://galileo.rice.edu/sci/instruments/pendulum.html • http://www.crystalinks.com/clocks.html

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