Physics Questions, Problems & Solutions : TransWikia.com ~ Page 707

Relation between stress and resonance

I am working on a project to measure the stress in metals so I am looking for a variable that changes directly with stress. I noticed that when hitting a...

Asked on 12/26/2020 by Kareem Ahmed

1 answer

Do time dilation and length contraction cancel out?

I've recently been getting into special relativity by myself. I noted something interesting: We know that the factor by which time dilates and lengths contract is the Lorentz factor ...

Asked on 12/26/2020

4 answer

Constant work function although changing Fermi energy

I'm working with the following book “Interfacial Electrochemistry” (2nd Edition) written by Wolfgang Schmickler and Elizabeth Santos and I'm trying to understand the process described in section "Absolute electrode potential"....

Asked on 12/26/2020 by dennis-tra

1 answer

Is number of photons undefined for a classical EM wave?

I have read somewhere (several times in different places, and can't find this now) that for a classical EM wave (or an approximation thereof) number of photons is not defined....

Asked on 12/26/2020 by Ruslan

4 answer

Can we feel the electrons which move from one object to other during rubbing which caused charge?

I am new to the world of electricity and magnetism. And still learning the basics of it. As I was studying about transfer of electrons I got the following doubts...

Asked on 12/26/2020 by bora ramireddy

1 answer

Heisenberg representation: why position operator has no explicit time dependance?

In Heisenberg representation we have:$$frac{d}{dt}A_H(t)=frac{1}{ihbar}left[A_H(t),H_H(t)right]+frac{partial A_H(t)}{partial t} (1)$$where I use the subscript $H$ to make as explicit as possible...

Asked on 12/26/2020

1 answer

What happens to heat waste produced by energy generation?

What happens to heat waste produced by energy generation on earth that must be there according to the laws of thermodynamics? So, it never dissipates and remains on earth?...

Asked on 12/26/2020 by user27515

4 answer

Entropy reducing power generator

An 8.3 EER 1200 W air conditioner will move 10000 BTU of heat per hour. 1 BTU is 1055 J of heat. Per second this is moving 2930 W...

Asked on 12/26/2020 by Dallas

1 answer

Energy of exciton formation in semiconductors

Many sources I've seen have alluded to:An exciton can form when a material absorbs a photon of higher energy than its bandgapI looked at absorption enhancing effects of excitons, and...

Asked on 12/26/2020 by Aleksejus Pacalovas

1 answer

Why does water ($mathrm{H_2O}$) only have two distinct fluid phases?

Water (and other substances) can exist in many distinct solid phases (with different crystallic micro-structure), but only in two fluid phases - liquid and gaseous, in which the molecules are...

Asked on 12/26/2020 by Ján Lalinský

4 answer

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