Activity for peterh
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Comment | Post #294724 |
Work is not so easy in the GR, for example there is no energy conservation. But if there is a deviation from the planar metric, there is acceleration, too. (more) |
— | 5 months ago |
| Comment | Post #295981 |
Somehow I have the layman intuition that it is a 3-vector. (more) |
— | 5 months ago |
| Edit | Post #295981 |
Post edited: |
— | 5 months ago |
| Edit | Post #295981 | Initial revision | — | 5 months ago |
| Question | — |
How do the quark charges relate to the gluon charges? The popular idea about the strong charges is that quark have R,G,B and gluons have a "pair" of one of these and its anticharge (like red-antigreen). A bit deeper, the concept is that the strong field has `SU(3)`, which is the group of the 1-determinant 3x3 complex matrices. It has 8 independen... (more) |
— | 5 months ago |
| Comment | Post #295669 |
As far I know, actually all measurements are "ratio type". There is no absolute measurement, you can only compare something to another. The wiki page shows some "interval type" measurement, there it lists SI units in the interval type (like K or s since big bang). I can not really agree this conc... (more) |
— | 5 months ago |
| Comment | Post #288288 |
While the GR is non-linear, it can be considered linear for small spacetime distortions. That is the linearized general relativity. As being linear, wave propagation and similars are happily coming out. (more) |
— | over 1 year ago |