ittingmethodoptimizestheperiodfitattheexpeeofaleerevaluationoftheotherparameters.
researchonphysicalpropertiesoftorsionpendulum.thecurrentsituationwherethemeasurementalvaluesofgdisagreetoalevelfarinexceoftheirerrorestimate
s,suggeststhattherearesomesystematicerrorsintheexperimentsofmeasuringg.theaccuracyofdetermininggwithtorsionpendulumdependsonthecotancyofthetorsionringcotantofthetorsionfiber.ourresearchworksaboutthephysicalpropertiesofthetorsionfibersindicatethatthetorsionringcotantisdependentontheambienttemperature,thefrequencyandamplitudeofoscillation.asymmetricdisktorsionpendulumwasdesignedtocheckthecotancyofthetorsionringcotantofatungstenfiberatroomtemperature.thebackgroundgravitationaleffectcanbeeliminatedbythesymmetricdesignofthependulum.basedonexperimentalstudies,weobtainthefollowingresults:thefibernonlinearitywouldbelethan1miftheoscillationamplitudeofthependulumwasintheorderof0.01rad;qualityfactorqismoreseitivetotheamplitudethanangularfrequency,andtheamplitudedependenceofqshouldbecoideredinthetorsionpendulumexperimenttheambienttemperaturefluctuationwith1°cwouldintroduceacoiderableuncertaintyabout165minthetorsionringcotantofthefiber.itissuggestedthatthethermoelasticityofthetorsionfibershouldbemeasuredinaprecisiontorsionpendulumexperiment.
optimumconfigurationwithfourattractingmaes.theuncertaintyindeterminingthepositioandthegeometriesoftheattractingandthetestmaesisoneofthemostimportanterrorsourcesintheexperiment,anditusuallycontributesalargepartofuncer
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