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Hansen (Handsom) Tu & Shawn

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bob chen

on 20 October 2014

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Transcript of Hansen (Handsom) Tu & Shawn

Galileo Galilei was an Italian physicist and astronomer who led a scientific revolution in the early 1600s.
When Galileo studied in pisa he noticed swinging motion of a lamp during a religious ceremony he realized the swinging a.k.a. oscillation occurred at a regular interval.
He then came up with the idea of applying this motion to a clock.
Thus became what was known as THE Pendulum.
Unfortunately, he died (1642) before he could turn his ideas into a working clock.
Fortunately,
Christian Huygens a Dutch mathematician and physicist wanted to improve Galileo's ideas, and by 1656 he had figured out a way to make a pendulum properly regulate clock movement.
In return the invention increased the accuracy of clocks in ways people never imagined possible clocks that have been off by 15 minutes a day, were now off by no more then 15 seconds.
Best of all pendulum clocks requires very little maintenance. It could be ignored for days.
Forerunners required frequent adjustments daily.
Many people in the scientific community chastised Huygens for stealing Galileo's idea even doe Galileo couldn’t get the pendulum to work. But Christian Huygens did.
Christian Huygens is remembered for his tremendous accomplishments.

http://galileo.rice.edu/sci/instruments/pendulum.html

Aristotelian argued that heavier bodies feel faster than lighter ones in the same medium.
Galileo Galilei early in his career came to believe that the difference in speed depended on the densities of the bodies.
a pendulum could be used fpr timing pulses or acting as a metronome for music of students.
the devices became smaller and more reliable.

http://www.worldbookonline.com/advanced/article?id=ar421060&st=pendulum
Simple pendulum consists of a weight hanging at the end of a string or wire
In this equation, t is time, the period of the pendulum, in seconds; l is the length of the pendulum in feet (meters); and g is the acceleration due to gravity, a factor that depends on the gravity where the pendulum is. At sea level,g = 32.16 feet (9,802 meters) per second per second.
T = 2π√l/g

Sub:Socials Studies
Hansen (Handsome) Tu & Shawn Chan
The Pendulum
Clock
Sept,30,2014
Blk:C
Ms.Smith
who
What?
Where?
When?
Why?
How?
When he was in pisa noticed swinging motion of a lamp during a religious ceremony he realized the swinging a.k.a. oscillation occurred at a regular interval.
He realized the swinging a.k.a. oscillation occurred at a regular interval.
He came up with the idea of applying this motion to a clock, thus became what was known as the Pendulum.
Best of all pendulum clocks requires very little maintenance. It could be ignored for days.
Forerunners required frequent adjustments daily.

Born: 15 February 1564
Death: 8 January 1642 (aged 77)
He was an Italian physicist, mathematician, engineer, astronomer, and philosopher who played a major role in the scientific revolution.

Galileo Galilei was an Italian physicist and astronomer who led a scientific revolution in the early 1600s.

He died (1642) before he could turn his ideas into a working clock.

Born: 14 April 1629
Death: 8 July 1695 (age 66)
He is known particularly as an astronomer, physicist, probabilist and horologist.
Galileo had the idea of making a swinging motion clock in at the university of Pisa.
Galileo got the idea how to make the pendulum clock. And that is where is all started.
University
Of Pisa
Christian Huygens a Dutch mathematician and
Physicist wanted to improve Galileo's ideas, and by 1656 he had figured out a way
Christian Huygens is remembered for his tremendous accomplishments.
Simple pendulum consists of a weight hanging at the end of a string or wire
In this equation, t is time, the period of the pendulum, in seconds; l is the length of the pendulum in feet (meters); and g is the acceleration due to gravity, a factor that depends on the gravity where the pendulum is. At sea level,g = 32.16 feet (9,802 meters) per second per second.
T = 2π√l/g
Galileo was fascinated by the period of swing of a pendulum is independent of its amplitude--the arc of the swing--the isochronism of the pendulum.
At first they used the early pendulum device to measure the pulse of patients.
They soon asked if they could improve clocks using the pendulum system.
It is still used today in timing pulses or acting as a metronome for music of students.
Galileo made his first note on the pendulum in 1588.
He started to do serious investigation in 1602.
But the accuracy of the best clocks was still so low that they were, for instance, useless for astronomical purposes. So, In 1641, at the age of 77, totally blind, Galileo turned his attention to this problem.
Then after two years after the publication of Christiaan Huygens's Horologium , in which Huygens described his pendulum clock. It is from Huygens's construction that we date the practical development of the device.
THE END.
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