Computer Science
Scientific paper
Mar 1911
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1911natur..86..142l&link_type=abstract
Nature, Volume 86, Issue 2161, pp. 142-143 (1911).
Computer Science
Scientific paper
THE subject of Mr. Brush's article in NATURE of March 23 (p. 129) is certainly of profound interest, and will continue to be so until the problem as to the nature of gravitation is solved. Meanwhile, a few questions, raised are comparatively simple. Anyone asked, Where lies the energy of a raised weight? must surely reply, ``In the æther'', i.e. in the medium, whatever it is, that is driving the weight down towards the earth. A critic who, either doubts or asserts this will not be confused-as Mr. Brush suggests he will be-by the suggestion that the weight might be raised so high as to reach the neutral point between earth and moon-a suggestion which carries with it the tacit questions, ``Where is the energy now?'' and ``What has become of the work done?''-for this case is no more troublesome than the case of a weight raised and hung on a hook. Something-some opposition force-sustains the weight, i.e. opposes the pull of the earth, and it matters little whether the opponent be a shelf beneath it or the moon above it. The important thing to understand is the nature of the down-ward propelling force-indeed, of both the upward and the downward force-in either case.
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