Physics Questions, Problems & Solutions : TransWikia.com ~ Page 240

General treatment of connections and covariant derivatives

Hi have been following an introductory course on quantum gravity and we are covering the basics of free quantum field theory in curved spaces. I have been introduced to how...

Asked on 06/24/2021

1 answer

How large would the steam explosion at Chernobyl have been?

So the second episode of the HBO series began to cover the risk of a steam explosion that led to them sending three divers into the...

Asked on 06/24/2021

8 answer

How can I show that in an elastic collision i can set $| vec{v_2} - vec{v_1} | = | vec{v_2}' - vec{v_1}' | $?

I am getting stuck in a really easy problem in Statistical Mechanics that involves elastic collisions, it is really very shameful that I am getting stuck at such a simple...

Asked on 06/23/2021 by Felipe Dilho

2 answer

Can electricity be transferred via satellites?

Internet data is transferred through satellites. Mobile Networks are based on wireless transfer. Why can't electricity be transferred wirelessly?...

Asked on 06/23/2021 by Ben Caesar

2 answer

Is the Poynting vector always perpendicular to the plane a circuit lies in?

The Poynting vector is the cross product of electric and magnetic field (divided by $mu_0$). Given an electric circuit that lies on the plane of a circuit board, the...

Asked on 06/23/2021

1 answer

Is the conformal group in $2+0$D isomorphic to the Lorentz group $SO(3,1)$ in $3+1$D?

In the Wikipedia article on conformal field theory, it is said the following:The conformal group is locally isomorphic to $SO(1,d+1)$ (Euclidean)or $SO(2,d)$ (Minkowski).Does that...

Asked on 06/23/2021

2 answer

Spinning top fixed point

I have seen many explanations about the movement of a spinning top. The explanations were in a varied level, from basic newtonian mechanics to Lagrangian formalism. But I do not...

Asked on 06/23/2021 by user115652

2 answer

Coherent state (or “poissonian process”) with uncorrelated phases = thermal state?

Thermal states don't have poissonian statistics. But here @A.P. says:If the phases of the emitted photons were uncorrelated the randominterference would lead to a thermal state, as explained...

Asked on 06/23/2021

2 answer

$k$ wave number expectation value

I have a wave function $psi(x,t)$ and its fourier transform $phi(k,t)$. Question: Can I calculate the expectation value of $hat{k}$? I mean, doing the weighted average in...

Asked on 06/23/2021 by LongJohn

1 answer

How fine can single photon detectors made to be?

It is said that light behaves like a wave until it is measured, then it behaves like a particle.Photons (the particles) then have to be defined by the measuring...

Asked on 06/23/2021 by Manu de Hanoi

2 answer

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