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Physics : Recent Questions and Answers (Page 587)

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

Where did the boundary conditions go in the frequency-space solution to the Green's function for a damped harmonic oscillator?

In differential equations, Green's functions are only defined given boundary conditions. In fact, you need two of them for a second order differential equation. In a lot of physics lecture...

Asked on 02/06/2021 by semmo

1 answer

Demonstration of Clausius theorem for irreversible cycles

If we have a generic reversible cycle, we can approximate it with $n$ reversible Carnot cycles like in the pic, and we obtain: $$sum_{i=1}^nfrac{Q_{i}}{T_{i}}=0$$...

Asked on 02/06/2021 by Landau

3 answer

Renormalization and yet missing mathematical proofs?

I learned that renormalization used in the standard model while working is using some math that has not yet been proved. Put very simple renormalization is subtracting...

Asked on 02/06/2021 by Sjoerd222888

0 answer

Real image by concave mirror or convex lens

My question is how exactly can we 'see' the real image ON the mirror or lens without a screen?Also if a screen is placed, for example a real image...

Asked on 02/06/2021 by Dominic-Selene 1.618

0 answer

Question About Radiative Transfer Equation Bounds of Integration

I'm unsure of what bounds to use for the integral involved in the formal solution to the radiative transfer equation. In some sources, the integral shown below goes from...

Asked on 02/06/2021 by safaroth2

0 answer

Muon $g!-!2$ experiment at Fermilab

At Fermilab the $g!-!2$ Muon experiment is going on which measures the magnetic dipole moment of the muon. Can we explain the difference in prediction of theory and experiment...

Asked on 02/06/2021 by user276797

1 answer

About Divergence in polar coordinates

I've got a conductor in a cylinder shape that is rotating with angular velocity $omega$ around its axis, that correspond to the $z$ axis I want to calculate...

Asked on 02/06/2021

0 answer

Does the entropy of the universe change as expansion exceeds the speed of light?

The potential encoded information in a photon that is at the edge of the observable universe would seem to be lost as the universe expands. Does that loss of...

Asked on 02/06/2021 by A Monroe

3 answer

Mathematically prove that a round wheel roll faster than a square wheel

Let's say I have these equal size objects (for now thinking in 2D) on a flat surface. At the center of those...

Asked on 02/06/2021

11 answer

Understanding dependent/independent variables in physics

How does one determine the independent and dependent variables? What do the terms mean? Can they be derived from a formula? For example I saw in a textbook $F...

Asked on 02/06/2021

2 answer

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