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pb1729
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38
How is length contraction on rigid bodies possible in special relativity since definition of rigid body states they are not deformable?
Dec 22, 2020
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28
In a vacuum can a cooler body radiate Infrared radiation to a warmer body?
Aug 19, 2018
answer
15
In the twin paradox does the returning twin also come back permanently length contracted flatter than the twin on Earth?
Oct 8, 2019
answer
11
(Special relativity) A tilted dipole composed of $+q$ and $-q$ point charges moves at a horizontal velocity. Will it rotate?
Mar 28, 2021
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10
Issues with operator associativity in quantum mechanics
Mar 20, 2022
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9
If Maxwell's equations relate fields at the same point, how can waves propagate between different points?
Sep 7, 2018
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7
Earthing the plates (one or both) of a parallel plate capacitor — How can one make use of the fact that the potential of the plate is zero?
Aug 26, 2018
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4
How did the big bang's low entropy (which comes from gravity) get converted to sunlight?
Jul 2, 2023
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4
Thermodynamic cycles of quantum particles
Sep 17, 2018
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3
How to neutralize iron magnetism?
Sep 24
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Prove that given any five integers, there will be three for which the sum of the squares of those integers is divisible by 3.
8
Is it already known that $\sum_{i=1}^x\cos(S(i))\sim ax\cos(b\ln x)$, as $x\to\infty$, where $S(i)$ is the number of Collatz steps from $i$ to $1$?
7
My former self is still inside of me... you'd only care when I'm inside of you
5
Riley Riddle: My infix describes its own letters