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Physics : Recent Questions and Answers (Page 517)

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

Two sealed valve-coupled water/air tanks with a common sump. How long after the valve is opened does it reach steady state?

What's the formula that relates the dimensions of the tanks, the water levels and the pipes to the time it takes...

Asked on 03/03/2021 by Karim Wassef

2 answer

Finding The Trajectory of particle Kept on a rotating surface

Suppose we "Keep" a particle on a circular, rotating turn-table, rotating with constant angular velocity $dot{theta}$, (i.e, the at $t=0$,when the particle makes contact with the table, the...

Asked on 03/03/2021

1 answer

What is the shape of a stream of water coming out of pipe?

As shown in the photograph below, when water comes out of a pipe (located on the surface of the earth) it travels downwards in an arc. ...

Asked on 03/03/2021

3 answer

In an intrinsic semiconductor, are there the same number of carrier electrons and holes? Or this is just exclusive for silicon?

I am working with some polymers that behave like semiconductors when they are plugged into the current. I am calculating the mobility of these polymers and I need the value...

Asked on 03/03/2021 by Abdel Ruvalcaba

1 answer

Solenoidal electric field

In electrostatic electric field in a system is always irrotational ∇×E=0. And divergence of electric field is non zero ∇.E=ρ/ε but in some cases divergence...

Asked on 03/03/2021

2 answer

Condition on 4-potential to give left-circular polarized light?

To get a collection of left-circularly polarised photons, do we put a condition on the 4-potential $A_mu$? Or is it a condition on the wavefunction $Psi[A]$ to say...

Asked on 03/03/2021

0 answer

Question about Mode expansion of free compact boson

$(1+1)$-Dim free compact boson, Lagrangian is$$mathcal{L}= frac{1}{2}(partial_muphi(sigma,t))^2$$with $phi(x,t)simphi(x,t)+2pi r$ and periodic boundary condition along $x$, i.e. $phi(sigma,t)= phi(sigma+beta, t)$. Equation of motion is...

Asked on 03/03/2021 by maplemaple

1 answer

A simple doubt on Clausius-Clapeyron equation

Blundell and Blundell writes$$frac{mathrm{d} p}{mathrm{~d} T}=frac{s_{2}-s_{1}}{v_{2}-v_{1}}$$ where $s_1$,$s_2$ are the entropy per particle in phase 1 and 2 and $v_1$,$v_2$ are the...

Asked on 03/03/2021

0 answer

Clarification regarding Principal axes in rigid-body motion

Question: We need to find, the angular momentum of the assembly, about the Center of mass. As per Kleppner and...

Asked on 03/03/2021 by satan 29

1 answer

Adjusting the rate of proton decay in the standard $rm SU(5)$ grand unified theory

The proton decay rate in the standard $SU(5)$ grand unified theory is given by$$Gamma sim left(frac{g^2}{M_x^2}right)^2 m_p^5 =frac{g^4}{M_x^4}m_p^5$$Naively we could push up the bound...

Asked on 03/03/2021

1 answer

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