User contributions for DanDangerous

A user with 27 edits. Account created on 12 January 2015.
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  • 23:1923:19, 5 February 2016 diff hist +2 m List of relativistic equationsThe terms "proper length" and "proper distance" differ. The expression "proper distance" means the length of a space-like-interval, whereas the "proper length" is the length of an object as it is measured by an observer which is in rest relative to it.

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12 June 2015