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1 vote
1 answer
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Is topology change possible in Einstein's general theory of relativity?

3 votes
2 answers
1k views

Does "Crack The Whip" actually speed you up?

0 votes
1 answer
9 views

Electric potential

7 votes
2 answers
2k views

Should the energy-momentum tensor be invariant under gauge transformations?

1 vote
1 answer
318 views

How to choose sign/direction of momenta in Feynman diagrams?

2 votes
1 answer
404 views

Thermodynamic potentials without unconstrained variables?

5 votes
1 answer
542 views

Conformally invariant theory. Relationship between conformal transformations and conformal rescaling (Weyl scaling)

-2 votes
1 answer
37 views

Leveraging mercury's depression in a capillary for a siphon (and potentially a capillary engine!!)?

2 votes
0 answers
27 views

Gaussian integration with operator-valued sources and time ordering

18 votes
6 answers
2k views

Is zero-point energy a mathematical artifact?

5 votes
2 answers
236 views

2 ways of resolution of vectors

3 votes
2 answers
337 views

Do enough photons from Proxima b make it to Earth that its surface could be imaged directly with a huge, but not astronomically so, telescope?

0 votes
0 answers
15 views

Lorentz Force on a Solenoid Doesn't Multiply

1 vote
1 answer
270 views

How to use Ampère's law in this problem?

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