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A pendulum on a knife edge bearing may swing back and forth in a plane (relative to the Earth). A pendulum suspended from aneedle bearingmay swing in elliptical fashion on the surface of a sphere.For the movement to stay parallel to a plane which is fixed relative to the stars, the pendulum must have a needle bearing but no initial momentum perpendicular to that plane. However, the origin of that plane will follow the daily and yearly movements of its location on the Earth. Relative to the Earth, such a pendulum's path will appear to rotate once around every sidereal day (23 hours, 56 minutes, 4 seconds).
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
Simple, 33 or Thirty-three
There are three simple tenses - past, present and future.
there are three, height, weight, and length
This pendulum, which is 2.24m in length, would have a period of 7.36 seconds on the moon.
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Three ways to modify a pendulum include: * Change the length * Change the size of the end-weight * Change the weight of the end-weight
At rest, tension in the string and weight of the bob are the two forces both equal and opposite. During its displaced position, the weight of the bod, tension of the string and restoring force all the three would act on it
A pendulum on a knife edge bearing may swing back and forth in a plane (relative to the Earth). A pendulum suspended from aneedle bearingmay swing in elliptical fashion on the surface of a sphere.For the movement to stay parallel to a plane which is fixed relative to the stars, the pendulum must have a needle bearing but no initial momentum perpendicular to that plane. However, the origin of that plane will follow the daily and yearly movements of its location on the Earth. Relative to the Earth, such a pendulum's path will appear to rotate once around every sidereal day (23 hours, 56 minutes, 4 seconds).
A ball spinning on a string as a simple pendulum. A satellite orbiting around Earth. Water swirling down a drain in a sink.
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
Focault's Pendulum refers to a large pendulum which is used to demonstrate or measure the rotation of the Earth. Cleopatra's Needle can refer to any of three ancient Egyptian obelisks which were transported to London, Paris and New York and re-erected as monuments.
The three simple tenses are:Past tenseFuture tensePresent tense
The three elements in simple sugar are carbon, hydrogen, and oxygen.
A pendulum consists of a weight or mass attached to a rod or string that pivots at a fixed point. It swings back and forth under the influence of gravity, following an arc. The key components are the bob (weight), suspension (rod or string), and pivot point.