Jump to content

geordief

Senior Members
  • Joined

  • Last visited

Everything posted by geordief

  1. OK ,so from the frame of either of the two objects in scenario A the other approaches and in scenario B the other is at rest and close proximity. So scenario B curves spacetime less than scenario A? Is the momentum of an object one of the elements in the curvature tensor?
  2. Is spacetime curvature frame dependent? (In my second scenario both objects are at rest wrt each other,I think)
  3. Suppose we have two massive spherical objects and they are moving wrt each other. They pass each other at one point . Do their respective momentums (in addition to their mass) combine to curve spacetime at that point? Again (a different scenario) ,if the same two massive objects follow the same trajectory as each other do the pair also curve spacetime ,but differently from the earlier scenario? Ps Am I barking up the wrong tree to try and separate curvature effects due to mass from curvature effects due to momentum and are they perhaps two sides of the same coin?
  4. geordief replied to iNow's topic in The Lounge
    Ectually she takes after her mother's side of the family (more Rt.Hon than right on) and pronounces that fish as "barse". I flounder when trying to cope with that tomfoolery.
  5. geordief replied to iNow's topic in The Lounge
    I tried telling that quip to my daughter but just got a deadpan expression.
  6. I am wondering about this supposed spat btw Wagner and the Russian army " Wagner boss Yevgeny Prigozhin has complained of a lack of ammunition, saying it could be "ordinary bureaucracy or a betrayal". https://www.bbc.com/news/world-europe-64859780 Smoke and mirrors or are we looking forward to a Russian retreat quite soon?
  7. It is a faith but an overwhelmingly convincing one. Does it make a point to ask whether "reality" describes something set in stone or something continuously changing ,even if imperceptibly.? Off topic I find it more rewarding and satisfying to weed out what is "unreal" than to home in on what may be considered essentially true.(well I don't have the intellect for the latter ,anyway)
  8. Or My Little Ding-a-Ling (Not sure who was the best American dancer btw his Duck Walk and MJ's MoonWalk
  9. You must mean best Irish poet? Shakespeare is so obviously the most highly considered English poet that it would make little sense to put Spike Milligan in his league. Spike certainly was a wonderful man writing a wonderful epitaph for his tombstone but could never have written the Tombstone Blues.
  10. I think the first line may have come from the title of this book (but don't quote me) https://en.m.wikipedia.org/wiki/Darkness_at_Noon I think that Dylan is dead to the new Dylan .
  11. Have there been any studies on children brought up from birth with no connection to their genetic parents? There must be very many cases where a child is born but the parents and /or other family members die . Would such circumstances shed light on whether there is behaviour that is truly innate and what those behaviours might be?
  12. Hadn't considered that.But some of that stuff will be moving in the opposite direction to him.Can he see that? Some stuff will be orbiting the BH;might he see that as it swings around in his direction?
  13. So the premise in the(my)OP was wrong .A misunderstanding no doubt on my part from a long time ago. Moving on,if we have a spacecraft approaching a black hole activities btw it and the event horizon will seem speeded up,won't they? An observer in the spacecraft will see all the objects which had disappeared into the BH ahead of him ,can record them and send back the recorded pictures of all that happened just outside the event horizon from the inception of the BH. It would need a very powerful slingshot to send back the holiday snaps (and it's own deductions if appropriate)
  14. Would it (the time dilation)slow the speed of the conversation down without affecting the pitch? (Maybe it would affect the pitch too) Would there be a particular relative speed where the doppler speeding effect would exactly counterbalance the relativistic time dilation slowing effect?
  15. Well ,not by later recovering a recording of any conversation (that is obvious ,I suppose) But hopefully using whatever method comes closest to how we listen or watch something in our own frame of reference (there is forcibly a delay ) So in my mind ,for the approaching spacecraft I imagined us sending a laser beam against perhaps a window and capturing a recording of the window's vibrations in the light that was reflected back to the emitter. For the plane travelling just below the speed of sound I had a similar (same) method in mind So ,as "directly "as possible (perhaps there are better methods?)
  16. I have been reliably informed that ,if we could listen in directly to an object like a spacecraft that was approaching us at a relativistic speed then any ongoing conversations would be heard slowed down rather than sped up as my intuition have supposed. Since we also have the relativistic doppler effect (ie in addition to time dilation) am I to think of a conversation that would be both high pitched and slowed down? And what about the same situation but purely with sound? If we had a plane approaching us at just below the speed of sound could we reflect a sonic beam against the cabin window and eavesdrop on the pilots conversation? Would it be high pitched and simultaneously slowed down?
  17. "Meme" is a word whose meaning I cannot fix in my mind no matter how often I learn it. It seems simple enough but each time I see it used it doesn't make sense
  18. Not inherent seemingly as it is a translation. (I know sfa about the man's work...I think he lost his mind in the end)
  19. You could ask Chat Gpt? Or just interrogate the quote.It might give you a better answer than its author. "Disciple of truth " has a messaianic ring to it imo
  20. I am not familiar with "Social Housing" in Europe (just in UK and Ireland) but ,from this article it appears that it is a European thing and being discussed in USA https://www.npr.org/local/305/2020/02/25/809315455/how-european-style-public-housing-could-help-solve-the-affordability-crisis I wonder if it might help the homelessness problem in the States(and if homelessness is worse over there than it is here-don't think we have the opioid problem as bad anyway) When I was hitching in the States I used to look for accommodation in rural police stations and was obliged(somewhere in the Rockies from memory)
  21. Don't you have an entitlement to subsidized public housing in USA? We do ,if you get on the housing list and your means and needs qualify you. Thatcher sold off a lot of the "council houses" in her day which (I don't live there but I imagine) must make it very hard to get a house where you might want to live.
  22. It is off topic but perhaps of interest that I was once threatened with deportation from France via use of their vagabondage laws. I was "working" for a Belgian employer in Agen who had a very strong disagreement with me (he had to be pulled off me and he was armed) and he told me to leave ,which I did. He knew I had no money and was working for free.
  23. But once the houses are built you can get on the housing list if you pass the means test and if you fo not qualify for subvention (think there is something for first time buyers) the cost of housing (renting or buying)for the better off would probably fall to a degree. Whatever about homelessness the inability to get a home near work makes life hard for the workers and creates a problem for the popularity of the government which is forced to set targets for house building
  24. If you just increase the amount of houses built to match the demand won't the prices of houses fall overall? You just build them where possible (in sufficient quantities) and the housing availability part of the homelessness equation falls off the table. There is a housing crisis in Ireland and ,as well as I can understand that is the argument put forward here -because even working couples can't get on the property ladder.
  25. Not much spare flesh on that. No wonder he enjoyed celebrity. Shame he wasn't a jazz maestro to top it all off.

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.