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Physics : Recent Questions and Answers (Page 251)

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

UV catastrophe and Equipartition Theorem absurdity

I'm reading Eisberg & Resnick's explanation of the UV catastrophe and they say that classically in a black body cavity, each frequency of electromagnetic radiation has average energy = ...

Asked on 06/18/2021 by lamplamp

1 answer

How does making harmonics work on a guitar?

If you excite the string without fretting it anywhere, you will get a fundamental harmonic. If you fret it at the halfway length, you will get the second harmonic (higher...

Asked on 06/18/2021

2 answer

Induced gravitation action

Considering the action for induced gravity: $$S=int d^4xsqrt{-g}left(epsilonphi^2 R-frac{1}{2}(partialphi)^2+V(phi)right).$$ I was trying to get the metric field equations by doing the usual procedure and for the $delta(phi^2 epsilon...

Asked on 06/18/2021

1 answer

3 x 2 or 6 x 2 Surface Reconstruction

I encountered expressions such as "3 x 2 surface reconstruction" or "6 x 2 surface reconstruction" while studying. I understand surface reconstruction refers to the movement of atoms on the...

Asked on 06/18/2021 by JustStartedStudying

1 answer

Electric potential/gravitational potential

potential is defined as the amount work done by an external force to move from something position at infinity to position R per unit charge if the...

Asked on 06/18/2021

1 answer

Why do two objects at distance of closest approach have equal velocity?

So, Here is a proof I came up for it, Define relative position function $x_1$ is position of body-1 and $x_2$ of body-2: $$x(t) = x_2 (t)...

Asked on 06/18/2021

2 answer

References for effective viscosity experiments

PresentationI am studying the following fluid mecanics problem : let's consider a domain $Omega$ filled with water. In this fluid, we can find perfectly spherical particles of radius ...

Asked on 06/18/2021 by Velobos

0 answer

Does the Kalman filter incorporate a Heisenberg-like uncertainty principle?

In the case of mechanical systems, applying the Kalman filter involves combining model based prediction (using an apriori known dynamical model) with real-world noisy observations of the...

Asked on 06/18/2021

0 answer

Significance of wave number?

Till now all I know about the wave number is its formula i.e. ${frac{2pi}{lambda}}$. I always wanted to know what it really means. So can anyone please, explain me its...

Asked on 06/18/2021 by Anil Kamat

3 answer

Does the Earth emit gravitational waves?

We know about Bohr's model and his vague postulate challenging Rutherford regarding discrete orbits and not emitting electromagnetic waves during this. Extending this idea to our solar system, does...

Asked on 06/18/2021 by Anubhav Goel

2 answer

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