torsion pendulum

torsion pendulum

[′tȯr·shən ′pen·jə·ləm]
(mechanics)
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Ted Cook of the University of Washington in Seattle and colleagues used a torsion pendulum to probe how gravity works at small scales, if the force's strength differs from expected when objects are very close, it could indicate that gravity leaks into extra dimensions.
provide fascinating information about the history of the pendulum and what scientists thought it did, the revolution wrought by Foucault, the special cases of the torsion pendulum, the chaotic pendulum, the quantum pendulum, and coupled pendulums, the effects of superconductivity, and the most familiar to most of us, the pendulum clock.
Using other instruments such as a high pressure gas dilatometry apparatus, a tensile tester, a pressure-volume-temperature apparatus, a thermomechanical analyzer, and a torsion pendulum, the 7 other orthotropic constants and the 3 coefficients of thermal expansion are determined.
The shear moduli were determined using a torsion pendulum made by the Virtis Company Inc.
Gillham received this recognition for the development of the first commercially available automated dynamic mechanical analyzer--a freely oscillating torsion pendulum.
For example, suppose a truck pulls into a parking lot outside the laboratory where a sensitive torsion pendulum is located.
The compilation shows that an influence of the crosslinking system is observed only in the TR test according to ISO 2921 and that differences in crosslink density are not reflected by the results of any other test method used, such as ISO 2856 for the glass transition temperature testing, the torsion pendulum test according to ISO 4663, the Gehman test (ISO 1432) or the brittleness point test (ISO 812).
Among the methods described there are: a torsion balance where the gravitational torque is balanced by an electrostatic torque produced by an electrometer; a torsion-strip balance where the fibre is substituted by a strip; a dynamic method based on a rotating torsion pendulum with angular acceleration feedback; a free fall method where the determination of G depends on changes in acceleration of the falling object, etc.
Apparatus for determination of %h% by Photoelectric method-Fabry- Perot Interferometer-Michelson- Interferometer-Rigidity modulus by torsion pendulum ( Dynamic) method,Velocity of sound by resonance column method,Dip Circle,De-Sauty%s bridge.