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Einstein introduced General Relativity 2.0

I stumbled upon the following article: https://www.livescience.com/einstein-biggest-failure-teleparallel-gravity.html . The following quote is taken from the mentioned article.In his attempts to make a super-theory of everything, Einsteinintroduced...

Asked on 01/26/2021

1 answer

Action at a distance in Quantum Field Theory

Definitely, I don't mean entanglement here:Suppose we have an electron and proton situating some distance apart, there is an electrostatic force between them, and this force is mediated by...

Asked on 01/26/2021

1 answer

Lagrange multipliers - isothermal-isobaric ensemble

I know that the entropy of isothermal-isobaric ensemble is given by: $$S = -k sum_{i=1}^M p_i ln p_i quad textrm{where $p_i$ must be normalized} quad sum_{i=1}^M p_i = 1...

Asked on 01/26/2021 by Rodrigo Monteiro

1 answer

Turbulence parameterization from gravity - fluid dynamics correspondence

I`m looking for a nice introductary reference that explains how the turbulence coefficient or any kind of turbulence parameterization (in view of applications to atmospheric turbulence for example) can be...

Asked on 01/26/2021 by Dilaton

1 answer

Effect of object mass in coeficient of restitution

I know the coefficient of restitution depends on the velocity before and after the impact of a bouncing ball. How does the mass affect it. Can't figure it out. ...

Asked on 01/26/2021 by SamuelNLP

1 answer

When the excess electrons move to equalise themselves in a negatively charged conductor, can it result in positively charged atoms?

i am a beginner in physics and am currently studying electrical engineering. I was wondering when the excess electrons move to equalize themselves, can it result in some atoms being...

Asked on 01/26/2021 by jack lim

1 answer

Net force when deriving relation between torque and angular acceleration

When deriving the equation $tau = Ialpha$, it is assumed that $$F_{tangential}=ma_{tangential}$$$$a_{tangential}=alpha r$$$$tau=rF_{tangential}$$$$tau=mr^2alpha=Ialpha$$ However, doesn’t Newton’s second law describe that $Sigma F=ma$? And isn’t $Sigma F$ in this case equal...

Asked on 01/26/2021

3 answer

Flux through a conduting cylinder?

A point charge of magnitude $Q$ is placed inside a conducting cylinder of length $L$ and radius $R$ at its centre. What is the flux through the cylinder?I know...

Asked on 01/26/2021 by user37420

1 answer

Can Schrödinger's cat be filmed?

Before opening the box, the observer does not know if the cat is alive or dead, however, a camera placed internally "knows" all the time, which is really happening. Does...

Asked on 01/26/2021

3 answer

Swimmer in pool - Fluid dynamics

I think the main mechanisme for the question a) is dead water but I dont know how to solve the following questions b and c. I tried to look...

Asked on 01/26/2021 by notaMathqueen

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