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Physics : Recent Questions and Answers (Page 520)

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

Clarification of why Rayleigh-Jeans law failed to explain blackbody radiation

I'm reading about why the Rayleigh-Jeans formula failed to explain blackbody radiation curves. The Rayleigh-Jeans formula:$$E = kTleft(frac{8pinu^2}{c^3}right)$$ I see explanations saying that the part of...

Asked on 03/02/2021

2 answer

How can current flow through an open wire (like a dipole antenna)?

I am trying to understand how current can flow through a dipole antenna (with length $frac{lambda}{2}$ or anything else) which actually is nothing more than an open wire. Could someone...

Asked on 03/02/2021 by privetDruzia

6 answer

Why does an isothermal expansion require more energy?

Let's say we have two completely identical cylinders of some ideal gas (same $P,V,T,n$, etc...), and we just want to double each one's volume.First CylinderThe first cylinder undergoes a...

Asked on 03/02/2021 by ManRow

1 answer

How is strong coupling constant related to cross section?

I've been looking through different Pdfs /articles on strong coupling constant and nearly all of them involve cross section, I've understood what cross section is but not how is it...

Asked on 03/02/2021

2 answer

Galileos statement about object thrown in horizontal direction arriving on the floor at the same time as if free fall

Is this statement correct? I intuitively believe it is wrong. Simplest example would be shooting a bullet. I just read this from my little brothers textbook. Is the textbook garbage...

Asked on 03/02/2021 by Jerry Cohen

3 answer

Wilson loop operator in electrodynamics

I'm trying to prove that the Wilson loop operator is well-defined in non-interacting quantum electrodynamics without matter, that is, $hat{W}(gamma)$ is a bounded operator on the Hilbert space. Since...

Asked on 03/02/2021 by Prof. Legolasov

2 answer

Is heat dissipation/heat loss a part of this Heat Generation formula?

I have been using a formula to calculate how much heat needs to be generated by a pipe in order to raise the temperature of the water flowing through the...

Asked on 03/02/2021

0 answer

Do things get brighter as they travel faster and if so what would the general equation to model that be?

I'd like to preface this by saying that I am not talking about glowing caused by the heat generated from air resistance. Instead lets just say that the hypothetical object...

Asked on 03/02/2021

1 answer

Why masses connected by via a string have same accleration?

The system is in equilibrium, and the following discussion occurs after spring-1 is cut. Now, as soon as spring-1 is...

Asked on 03/02/2021

3 answer

Question Regarding the conservation of momentum in an inelastic collision of two rods

I am tasked with solving this question but am facing some intuition difficulty. consider this system: The empty circle signifies...

Asked on 03/02/2021 by doraviv

1 answer

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