The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 291
... measurements that have been made are relative ; that is , they measure only the differences be- tween gravity values at various places . In tribute to Galileo the unit gal ( equivalent to 1 cm / sec2 ) has been adopted as the unit of ...
... measurements that have been made are relative ; that is , they measure only the differences be- tween gravity values at various places . In tribute to Galileo the unit gal ( equivalent to 1 cm / sec2 ) has been adopted as the unit of ...
Page 292
... measure of g . Modern gravity meters may have sensitivities greater than 0.005 mgal , the standard deviation of observations in exploration surveys being , in the best performance , of the order of 0.01-0.02 mgal . Differences in ...
... measure of g . Modern gravity meters may have sensitivities greater than 0.005 mgal , the standard deviation of observations in exploration surveys being , in the best performance , of the order of 0.01-0.02 mgal . Differences in ...
Page 293
... measuring G , though Michell died before the apparatus was completed . The first reliable measure- ment of G was carried out by Cavendish in 1798 with a torsion balance of the Michell type . Figure 1 shows schematically the method used ...
... measuring G , though Michell died before the apparatus was completed . The first reliable measure- ment of G was carried out by Cavendish in 1798 with a torsion balance of the Michell type . Figure 1 shows schematically the method used ...
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