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Il Guercio's user avatar
Il Guercio's user avatar
Il Guercio's user avatar
Il Guercio
  • Member for 10 months
  • Last seen more than a month ago
8 votes
2 answers
837 views

Is the tidal force the only real force-like quality of gravity?

7 votes
3 answers
691 views

Why does the Weyl tensor not show up in the Einstein field equations?

2 votes
3 answers
406 views

Why does acceleration in special relativity give rise to general relativity (and thus gravity)?

2 votes
1 answer
89 views

Is the equivalence principle violated for photons in the field of an infinite massive plane?

2 votes
1 answer
61 views

How fast do the neutrinos in the neutrino background radiation move through the universe?

1 vote
0 answers
64 views

How big was the universe after inflation? [duplicate]

1 vote
0 answers
63 views

What means Alan Guth's Free Lunch Principle for the universe?

1 vote
1 answer
52 views

Does the Weyl tensor amount to tidal effects of gravity?

1 vote
0 answers
85 views

Why do gauge particles with odd spin cause opposite charges to attract, while those with even spin cause them to repel? What's the math behind it?

1 vote
0 answers
133 views

Has the mass of a proton been calculated from current quarks, through the renormalization process?

1 vote
0 answers
72 views

What contributes most to the mass of the proton?

0 votes
0 answers
68 views

How fast must an incompressible ball, with mass $M$ and radius $R$, rotate to form a black hole?

0 votes
1 answer
40 views

Question about the derivative of contravariant momentum 4-vector wrt proper time

0 votes
0 answers
104 views

How far does a particle fall before it hits the singularity of a black hole?

0 votes
1 answer
81 views

How can the distance to the event horizon, as measured by a tape attached to a falling mass, be reconciled with the mass passing through it?

0 votes
2 answers
124 views

Does an object at rest on Earth accelerate in the timelike base direction?

0 votes
1 answer
68 views

Will a mass $m$ rotating around a black hole with mass $M$ form a new black hole together with $M$, at a close enough distance?

0 votes
1 answer
54 views

Can we see the rest-energy of a mass as its kinetic energy in the $ct$-direction?

0 votes
6 answers
198 views

Will the wheels of a relativistically moving train, according to an observer at rest, show friction with the tracks, when decelerating?

0 votes
2 answers
92 views

What will happen with the caterpillars of tank when it accelerates to a relativistic speed? [closed]

0 votes
0 answers
21 views

How long does it take before neutrino velocities in the neutrino background radiation are substantially less than the speed of light?

0 votes
1 answer
53 views

How is the chirality for the weak interaction conserved for non-relativistic neutrinos?

0 votes
0 answers
16 views

Why do there exist negative and positive electric charges but only positive masses? [duplicate]

-3 votes
0 answers
88 views

Does a train that moves at relativistic speed and then decelerates to zero speed, seem to expand to an observer at rest near the tracks? [duplicate]