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Physics : Recent Questions and Answers (Page 545)

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

Continuity Conditions at a General Wave Boundary:

is there some general approach to deducing the continuity conditions at a wave boundary for any type of wave - quantum, string, pressure etc. that works for you in your...

Asked on 02/21/2021 by EdS

0 answer

Falling and sliding object

I'm trying to model a particle being dropped from a height onto a smooth inclined ramp, sliding down it and then freely falling after it leaves the ramp at the...

Asked on 02/21/2021 by Nerd

1 answer

Can the Sun orbit the Earth?

You know how the earth orbits the sun because of gravity?...well if the sun were the right distance from the earth and it had the perfect tangential velocity...could it orbit...

Asked on 02/21/2021

4 answer

Why $C_p$ is zero for photon gas?

For photon gas, We know that$$U=u(T)V, p =frac{u(T)}{3}$$As $$G=U+pV-TS=uV+frac{u}{3}V-frac{4u}{3}V=0$$$$dG=-SdT+Vdp=0$$$$Rightarrow s=frac{dp}{dT}not=0$$$$dp=0Rightarrow dT=0$$which means that $C_p=infty$. which is...

Asked on 02/21/2021

1 answer

Problems understanding some cosmological models

There are some cosmological models (for example, the pre-big bang model, the emergent model, or the string gas model) that for me, as a student, are completely incomprehensible physically and...

Asked on 02/21/2021

0 answer

Why does falling water become less and less focused as it falls down?

So, I was observing my water purifier fill up my water bottle and I noticed that the beam of water coming through it became less and less focused as it...

Asked on 02/21/2021

2 answer

What fraction of the mass of all baryonic matter are black holes?

Is there a calculation of how much of the mass of baryonic matter is black holes, including supermassive black holes in the center of galaxies?...

Asked on 02/21/2021 by Arman Armenpress

1 answer

What is the relationship between lattice field theory and grid-based numerical methods?

I recently learned of lattice field theory wherein quantum fields are defined on a discrete spacetime. Naively this sounds to me a lot like certain numerical methods...

Asked on 02/21/2021

1 answer

Transparent Boundary Conditions 1D Klein Gordon

The wave equation is an example of an equation for which there are simple transparent boundary conditions. We can factorize the wave operator$$partial_t^2 -partial_x^2 = (partial_t - partial_x)(partial_t...

Asked on 02/21/2021

0 answer

How to approach this problem? (electrostatics, capacitors)

The problem:A flat capacitor is made of two strips of width $a$ and length $l$. The distance between them is $d$. Determine the capacitance of that capacitor...

Asked on 02/21/2021 by Wolfcho

0 answer

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