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seen Jul 7 '13 at 6:03

Apr
13
revised Work Done by Rockets in Orbital Motion
Changed potential to negative value.
Apr
13
revised Work Done by Rockets in Orbital Motion
added 334 characters in body; added 20 characters in body
Mar
29
revised More on the Feynman Path Integral Formula in Brian Cox' Lecture and its Consequences
Typo in equation.