On Friday, February 5, 2021 at 8:18:05 AM UTC-7 [email protected] wrote:
> On Fri, Feb 5, 2021 at 9:55 AM Alan Grayson <[email protected]> wrote: > > > > Assuming General Relativity is correct the formula PE= -(G*M^2)/R is >>> valid for* ANY* mass, even a photon of light because a photon contains >>> energy and M=E/C^2, and a photon of light is about as far from being >>> "fixed" as you can get. >>> >> >> *You misunderstand. For a particular mass M, the formula works. But in >> your model M increases for an expanding vacuum sphere. Do you mean to sum >> over the individual masses, to get the total PE?* >> > > Obviously > > > > > >> *> Anyway, without more information, I don't see how you can calculate >> the KE* >> > > If the formula that I gave for gravitational potential energy is not valid > then hydroelectric dams generate their energy from nothing and the > conservation of energy would not only be violated on the cosmic scale but > would be violated on the local scale as well and thus be absolutely useless. > > > *> As far as I can tell, you just keep asserting that the rest mass* >> > > Why do you keep talking about "rest mass"? > *Because you've asserted that the total gravitational energy is identically zero, using the formula that PE + KE + rest energy = zero. Without material particles having rest energy, the last two terms are undefined. AG* > A photon of light has no rest mass at all yet it produces a gravitational > field and that's the only thing it's important if you're talking about the > potential energy that gravitational field can produce. > > > >> * > increases as the vacuum sphere increases, but I haven't seen anything >> other than an assertion.* >> > > If General Relativity is correct and if the vacuum contains residual > energy (as general relativity allows an observation seems to insist) and > if the volume of a sphere really is 4/3 PI*R^3 as has been known for > centuries then the mass of the sphere of vacuum MUST increase as the > radius R gets larger because M=E/C^2. > > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/b58b110f-f2e8-4f69-9e33-5c40ccf62b22n%40googlegroups.com.
