Timeline for Newton's theory of gravity is covariant under Galilean transformations
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 6, 2019 at 16:41 | vote | accept | Cosmologee | ||
| S Feb 6, 2019 at 12:01 | history | suggested | Will Ness | CC BY-SA 4.0 |
replace an acronym with the full name
|
| Feb 6, 2019 at 11:21 | review | Suggested edits | |||
| S Feb 6, 2019 at 12:01 | |||||
| Feb 6, 2019 at 6:55 | comment | added | user4552 | The equation $\nabla^2\phi=4\pi\rho$ is not a dynamical equation, it's more like a constraint. Cf. physics.stackexchange.com/a/20072/4552 . In your two equations, $\rho$ only appears in one, so we can just take it as a definition of $\rho$. Although $\rho$ transforms trivially, even if it didn't, we wouldn't care; it wouldn't affect the truth-value of the equations. To make this a predictive theory, you need to couple your two equations somehow, probably by adding in an equation of continuity or something that relates motion of particles ($\ddot{x}$) to changes in $\rho$. | |
| Feb 6, 2019 at 6:05 | answer | added | G. Smith | timeline score: 9 | |
| Feb 6, 2019 at 5:33 | history | edited | G. Smith | CC BY-SA 4.0 |
added 4 characters in body
|
| Feb 6, 2019 at 5:08 | history | edited | Qmechanic♦ | CC BY-SA 4.0 |
deleted 12 characters in body; edited tags
|
| Feb 6, 2019 at 5:01 | history | edited | Cosmologee | CC BY-SA 4.0 |
added 11 characters in body
|
| Feb 6, 2019 at 4:00 | review | First posts | |||
| Feb 6, 2019 at 6:52 | |||||
| Feb 6, 2019 at 3:56 | history | asked | Cosmologee | CC BY-SA 4.0 |