Brahms
-
Posts
4 -
Joined
-
Last visited
Content Type
Profiles
Forums
Events
Posts posted by Brahms
-
-
On 8/11/2020 at 5:57 AM, Duda Jarek said:
A valuable thought experiment from neighboring thread - how would physics develop if there would be no Einstein, especially regarding gravity?
While modern physicists might say that without him there would be "weeping and the gnashing of teeth", his introduction of general relativity a century ago seems to be event of extremely low probability (?) - so what if it wouldn't happen?
Or imagine some hypothetical other civilization e.g. SETI is looking for - would it automatically get to GR? If not, how their physics would develop?
Beside Newton's gravity, there was also known GEM before ( https://en.wikipedia.org/wiki/Gravitoelectromagnetism ) - just take Maxwell's equations to gravity, making it Lorentz-invariant theory. "The best confirmation of GR": Gravity Probe B in fact has confirmed GEM as approximation of GR.
Without Einstein we would probably develop further Heavisides' GEM - adding corrections to Lagrangian (like in "Standard Model approach"), starting with EM-GEM coupling to bend photon trajectories by Sun ... the big question is if gravitational time dilation could be explained by such slowing down?
GEM has no renormalization problem, trivially unifies with the rest of physics as it is just another F_munu F^munu in Lagrangian - many approaches to solve this problem like string theory might never appear (?)
Where the problems would start - which experiments leave no doubts that we have to use GR instead of GEM?
Which cannot be repaired with added terms to GEM Lagrangian?
Physics itself does not really develop, as all the math, mass, space and time were always there. What develops is human understanding of the math, since Einstein had many collaborators or opponents all working on the same issues the differences would be less than they would be more
0 -
2 hours ago, watchingfromafar said:
If your home is near a forest that could burn your home down; there is a solution-----
Have a sprinkler system installed along your roof top. When a fire approaches your home, activate the sprinkler system which will cover your roof with water preventing it from catching on fire.
Just a friendly suggestion
(:-
This has been tried and pretty much failed which does not prevent scammers from selling rooftop sprinklers. Also do not expect much water pressure during the fire because everyone including the fire dept is using so one would need their own supply of several Olympic size pools or so for a small home. If you monitor this have a bomb shelter with Oxygen to run into as the fire rages over head
0 -
On 7/30/2020 at 4:53 PM, Oakmrkeii said:
So i had a thought, (most if them are dumb, this one may be too) if someone makes Lab grown bones in the shape of "devil" horns, would it be possible to attach it to their skull? Just to put there, not to grow or anything. Im guessing there's a lot of things wrong with that, but I was curious of if it would be possible. Also, could there be a possibility part of the bone could be left showing, and it be attached around the bottom to make it look more like actual horns. Would the body reject them? And what complications could arrive, or are there too many to count?
Perhaps not lab grown, but this has already been done. Not sure why lab grown would mean something though, as it would still not effect genetics
0
2 fun ideas
in Other Sciences
Posted
It's not even certain that a sperm could locomote to the egg without gravity which is the first hurdle of billions