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Physics : Recent Questions and Answers (Page 516)

Find answers to your questions about Physics or help others by answering their Physics questions.

Harmonics in a tube closed at one end

I have been learning about sound and how a tube closed at one end only seems to have odd harmonics. However, I have found that although clarinet follows this...

Asked on 03/04/2021 by Addison Ballif

1 answer

Klein-Gordon Propagator for spatial separation $x - y = (0, r)$

On pg. 27 of Peskin and Schroeder I would like to know how we get the first equality when deriving the Klein-Gordon propagator for $x^0 - y^0 = 0,...

Asked on 03/04/2021

1 answer

The two causes for the factor 2 in Coriolis effect

While reading this document on Coriolis effect http://empslocal.ex.ac.uk/people/staff/gv219/classics.d/Persson98.pdf, I saw the followig sentenceTwo kinematic effects each contribute half of the Coriolis acceleration: relative velocity and the turning of...

Asked on 03/03/2021

3 answer

How do I intuit viscosity in a rotating fluid?

Suppose I have two plates with a viscous fluid in between. I slide them in the same direction (a direction in their own plane), one at $5 ,text{m/s}$ and the...

Asked on 03/03/2021 by Mark Eichenlaub

3 answer

Does the intrinsic spin of electrons change when we excite electrons for hybridisation?

Have had been told that electrons can move from one energy level to another by transmitting or taking in energy, and do that profitably in hybridisation. I am interested in...

Asked on 03/03/2021

2 answer

Taylor expansion of retarded vector potential

I am currently trying to understand the Taylor expansion in radiation zone of the vector potential for a general time dependence. I know that the retarded potential is given by:...

Asked on 03/03/2021 by Buntess

1 answer

Energy balance paradox

Consider a closed system consisting of a room surrounded by walls at temperature $T$ (infinitely big, so $T$ remains fixed). In this room, we place a power source...

Asked on 03/03/2021

0 answer

Time transfer from proper to coordinate: apparent Special / General Relativity mismatching in theory

In SR we've learned that the time dilation for an observer moving clock w.r.t one fixed in a frame at rest is $$tau = gamma tau_0 = frac{tau_0}{left(1-v^2/c^2right)^{1/2}}$$ ref:...

Asked on 03/03/2021

2 answer

Is direct, complete conversion of matter to energy theoretically possible?

I know that small amounts of matter can be converted to energy via chemical and nuclear reactions, and that complete conversion is possible if matter meets anti-matter. Other types of...

Asked on 03/03/2021 by Scott Forschler

2 answer

Mass-energy of black hole spins

This article describes a paper in which the spin of the supermassive black-hole in M87 was observed and its corresponding energy was calculated. The figure given was...

Asked on 03/03/2021 by Will Jeremijenko

0 answer

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