FactChecker's latest activity
-
FactChecker reacted to .Scott's post in the thread Warning: Bad actors may already be in store-now-decrypt-later mode with
Informative.
A Feb 2026 Google security report states: And while we’re not there yet, malicious actors are not waiting until a Cryptographically... -
FactChecker reacted to PAllen's post in the thread Undergrad Why is gravity a fictitious force? with Informative.
I should add that there are different versions of the equivalence principle. For something called the strong equivalence principle...
-
You can't, because a black hole is not made of anything you can build something from. A black hole is just spacetime geometry. It's not...
-
FactChecker reacted to Ibix's post in the thread Undergrad Why is gravity a fictitious force? with
Like.
No. It is possible to construct theories in which it may differ. For example, ##F=GkMm/r^2##, where ##k## depends on the materials... -
FactChecker replied to the thread Undergrad Why is gravity a fictitious force?.I personally think that GR's explanation of why ##M_i=M_g## is one of the most intellectually satisfying things in physics.
-
FactChecker replied to the thread Undergrad Why is gravity a fictitious force?.Give yourself time to think about it. GR is a profound change in our thinking.
-
FactChecker replied to the thread Undergrad Why is gravity a fictitious force?.There could have been some reason for ##M_i=M_g## other than GR, but nobody could come up with one. It was a mystery until Einstein...
-
FactChecker replied to the thread Undergrad Why is gravity a fictitious force?.I would call it a satisfying consequence of General Relativity. GR explains the mysterious reason behind ##M_i=M_g##, not the other way...
-
FactChecker replied to the thread Undergrad Why is gravity a fictitious force?.General Relativity hypothesizes that an object, appearing to accelerate due to gravity, is simply moving in a non-accelerated straight...
-
FactChecker replied to the thread Undergrad Why is gravity a fictitious force?.No. But the current understanding explains why the exact same mass is appropriate in both equations. That is one of the strong points of...
-
And if you have no choice, send it as a .jpg, and throw some other quirk like writing it backwards or Letter +1 or something.
-
FactChecker reacted to PeroK's post in the thread High School Trivial quantum entanglement question (from a rookie) with Like.
You have several misconceptions about entanglement. First, entanglement is often a result of conservation laws and any number of...
-
FactChecker reacted to Ibix's post in the thread Graduate Rotating Disk Method to Attain Light Speed? with Like.
Bertozzi even filmed a simple test of this, and somebody put it on YouTube:
-
FactChecker replied to the thread Graduate Rotating Disk Method to Attain Light Speed?.Particles have been accelerated to near the speed of light, so it is known how much energy and force is needed. The results agree with...
-
FactChecker reacted to PeterDonis's post in the thread Graduate Rotating Disk Method to Attain Light Speed? with Like.
Relativity says it must be. Relativity imposes a finite limit on the strength of materials, and that limit ensures that it is impossible...