Physics
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Alex
  • Member for 7 years, 8 months
  • Last seen more than a week ago
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All Questions Answers
Score Newest
question
6
Intuition for Hamilton-Jacobi equation derived from least action
Aug 3, 2018
question
6
Invariance of $ds^2$ from invariance of all null intervals
Mar 12, 2019
question
5
Deriving special relativity free particle Lagrangian using infinitesimal boost?
Jan 25, 2019
answer
5
How do I expand: $\langle u , \nabla\rangle u$?
May 12
answer
4
Why does everyone seem to think that moving clock appear to tick slower?
Aug 5, 2019
question
3
How does the Equivalence Principle imply that derivatives of the metric vanish in a freely falling frame?
Feb 18, 2019
question
3
Stuck on Weinberg's quick derivation of Thomas precession
Oct 12, 2018
question
2
If decoupling means that photons no longer scatter how does neutral gas absorb CMB photons giving rise to the 21 cm signal?
Aug 9, 2018
question
2
What determines the timescale for fluctuations in the electromagnetic field from a light source?
Oct 3, 2018
question
2
A physical understanding of the 2/3 in the Sachs-Wolfe effect
Sep 16, 2014
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47
Sum array by number in numpy
44
Who runs the callback when using apply_async method of a multiprocessing pool?
14
What resources does an instance of a class use?

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