Thursday, September 5, 2013
New Measurement of Gravitational Constant Comes Up Higher Than Expected - Wired Science
New Measurement of Gravitational Constant Comes Up Higher Than Expected - Wired Science: The team, led by Terry Quinn, the former director of the International Bureau of Weights and Measures in France, used an updated version of Cavendish’s setup for one experiment. But they conducted an additional experiment, using a servo to counteract the twisting of the wire and figuring out the gravitational constant based on the voltage required to keep their apparatus from moving. Taken together, their tests yielded a new G value of 6.67545 × 10−11 m3⁄kg s2, which is higher than the current accepted value by about 240 parts per million.
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