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To find the torsion coefficient of the wire, Cavendish measured the natural resonant oscillation period T of the torsion balance: = Assuming the mass of the torsion beam itself is negligible, the moment of inertia of the balance is just due to the small balls. Treating them as point masses, each at L/2 from the axis, gives:
Pendulum 3 × 10 −6: Renner 1935 Torsion balance 2 × 10 −9: Dicke, Roll, Krotkov 1964 Torsion balance 3 × 10 −11: Braginsky, Panov 1972 Torsion balance 1 × 10 −12: Shapiro 1976 Lunar Laser Ranging 1 × 10 −12: Keiser, Faller 1981 Fluid support 4 × 10 −11: Niebauer, et al. 1987 Drop Tower 1 × 10 −10: Heckel, et al. 1989 ...
Atmos is the brand name of a mechanical torsion pendulum clock manufactured by Jaeger-LeCoultre in Switzerland. The clock gets the energy it needs to run from temperature changes in the environment and does not need to be wound manually. It can run for years without human intervention.
A Wilberforce pendulum can be designed by approximately equating the frequency of harmonic oscillations of the spring-mass oscillator f T, which is dependent on the spring constant k of the spring and the mass m of the system, and the frequency of the rotating oscillator f R, which is dependent on the moment of inertia I and the torsional ...
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A torsion pendulum clock, more commonly known as an anniversary clock or 400-day clock, is a mechanical clock which keeps time with a mechanism called a torsion pendulum. This is a weighted disk or wheel, often a decorative wheel with three or four chrome balls on ornate spokes, suspended by a thin wire or ribbon called a torsion spring (also ...
Torsion-pendulum.ogv (Ogg multiplexed audio/video file, Theora/Vorbis, length 13 s, 320 × 240 pixels, 422 kbps overall, file size: 650 KB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Garage Door Sectional Torsion Spring A mousetrap powered by a helical torsion spring Video of a model torsion pendulum oscillating. A torsion spring is a spring that works by twisting its end along its axis; that is, a flexible elastic object that stores mechanical energy when it is twisted.