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Physics
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zh1
  • Member for 9 years, 1 month
  • Last seen more than 1 year ago
  • North Carolina
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I am a PhD student in astrophysics, studying galaxy formation and evolution at the University of North Carolina at Chapel Hill.

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24
Why do people say that Hamilton's principle is all of classical mechanics? How to get Newton's third law?
Jan 1, 2018
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24
Why is the potential energy equal to the negative integral of a force?
Aug 1, 2016
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15
What is meant by multiplication in physics such as $s = v·t$?
May 22, 2020
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14
Microscopically, are all collisions really elastic collisions?
Sep 6, 2021
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7
What is the formula for the intensity of light, and how are amplitude, frequency and number of photons considered?
May 17, 2018
answer
5
How dose the factor $1/2$ in $E=\frac{1}{2} mv^2$ disappear in QM?
Aug 10, 2018
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5
Why is the helmholtz free energy minimized?
Jun 14, 2018
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5
Is Newton's third law due to inertia?
Apr 27, 2018
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5
Moment of Inertia
Aug 20, 2016
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4
What is Magnetic Intensity?
Dec 22, 2018
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Relation between angular resolution and aperture?