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A comment on NASA engineer's 'helical engine' may violate the laws of physics. Parent comment

Re:NASA engineer's 'helical engine' may violate the laws of ... by gpderetta on Tuesday October 15, 2019 @06:18AM (#21257103)
IANAP, but as far as I know it is true only if m is the relativistic mass which apparently is an obsolete and confusing concept which is not taught anymore (according to Wikipedia Einstein himself disliked it). Otherwise the formula only holds at rest.
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Re:NASA engineer's 'helical engine' may violate the laws of ... by semajian on Tuesday October 15, 2019 @06:47AM (#21257229)
Yes, well said.
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