Description:
Created by David P. Stern this is the first of three linked web pages. The one listed introduces the concept of mass and the question of how it may be measured without recourse to gravity, e.g. in the weightless environment of a space station. The second tells how such measurements were actually conducted in 1973 aboard "Skylab," and the third describes a simple experiment of comparing masses without using gravity, requiring only a hacksaw blade, clamps, bolts and a watch.
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