jbriggs444's latest activity
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Exactly. So you want "multiply by no ##a##s" to be "multiply by 1". -
jbriggs444 reacted to Herman Trivilino's post in the thread Graduate How valid is the Block Universe theory? with
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Oops. I had to go back and edit that post about 3 times because I kept making mistakes. Too early in the morning maybe? Oh well, what's... -
jbriggs444 replied to the thread Undergrad First law of this universe.Global conservation of mass is a feature of classical mechanics. Local conservation of stress energy is a feature of general relativity...
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jbriggs444 replied to the thread Undergrad First law of this universe.Height is not conserved. Nor is it usually additive. That makes it less meaningful and less useful to speak about height "moving". We...
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jbriggs444 replied to the thread Undergrad First law of this universe.Nor do I. To the extent that energy is localized and conserved, it may be sensible to speak about energy moving. We could, for...
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jbriggs444 reacted to haruspex's post in the thread If Heat Is Motion, Why Isn’t All Motion Heat? with Like.
Is it that clear cut? For a pair of contra-rotating discs there is a frame which minimises the KE but it is still substantial, and most...