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An Ellicott pendulum is a temperature compensated clock pendulum. The metal rod of a pendulum changes its length with temperature. The consequence is, that a colder pendulum swings faster (the rod is shorter) and a warm pendulum swings slower (longer rod). The Ellicott pendulum compensates this temperature error of the pendulum. It consists of a steele rod and two brass rods, wich are connectet in one point above the pendulum bob. Brass has a higher temperature coefficient than steele. On the free end of the three rods, a special lever mechanism, controlled by the lenght difference of the rods, lifts the pendulum bob up, when the length of the rods grows. The bob stays at its position and the period of the pendulum is without temperature influence.
See also http://commons.wikimedia.org/wiki/File:Ellicott_pendulum.png
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What does grandfather clock uses to measure time?
The Pendulum.
What instuments can be used to measure period of a pendulum?
You could use a stopwatch.
How do you measure time period of a pendulum if its length changes?
t = 2*pi*sqrt(L/g) where L is the length of the pendulum and g is the force of gravity.
Relationship between period of pendulum and length?
The longer a pendulum is, the more time it takes a pendulum takes to complete a period of time. If a clock is regulated by a pendulum and it runs fast, you can make it run slower by making the pendulum longer. Likewise, if the clock runs slow, you can make your clock run faster by making the pendulum shorter. (What a pendulum actually does is measure the ratio between time and gravity at a particular location, but that is beyond the scope of this answer.)
Why degree of amplitude of simple pendulum should not exceed 5?
wind resistance cannot be ignored in considering a simple pendulum. The wind resistance will be proportional to a higher power of the velocity of the pendulum. A small arc of the pendulum will lessen this effect. You could demonstrate this effect for yourself. A piece of paper attached to the pendulum will add to the wind resistance, and you can measure the period both with and without the paper.
What has the author John Ellicott written?
John Ellicott has written: 'A description of two methods by which the irregularities in the motion of a clock' 'An account of the influence which two pendulum clocks were observed to have upon each other' -- subject(s): Pendulum
Value of g by simple pendulum?
You can build a simple pendulum - one that has most of its mass concentrated in a small place, at the end of the pendulum. Measure the pendulum's length, and measure how long it takes to go back and forth. Use the formula for the period of a pendulum, solving for "g".
What does grandfather clock uses to measure time?
The Pendulum.
When did Dorothy Ellicott die?
Dorothy Ellicott died in 1990.
When was Dorothy Ellicott born?
Dorothy Ellicott was born in 1901.
When was Rosalind Ellicott born?
Rosalind Ellicott was born in 1857.
When was Ellicott's Stone created?
Ellicott's Stone was created in 1799.
When did Benjamin Ellicott die?
Benjamin Ellicott died in 1827.
When was Benjamin Ellicott born?
Benjamin Ellicott was born in 1765.
Discussion of the measurement of gravity by a bar pendulum?
You can use a simple pendulum, measure how long one period takes, then use the formula for a pendulum, and solve for gravitational acceleration.
Who is Andrew Ellicott?
Andrew Ellicott was a man that helped one of the presidents
What is the web address of the Ellicott City B And O Railroad Station in Ellicott City Maryland?
The web address of the Ellicott City B And O Railroad Station is: http://www.borail.org/Ellicott-City-Statio
