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Why energy eigenvalues in quantum mechanics are always positive? Ie whenever we try to solve Schroedinger equation why do we use E as positive?

Hi guys . Does the equation $PV^{\gamma} = constant$ hold for irreversible adiabatic process?

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@JohnRennie hi

Thanks for the help

No problem

@JohnRennie got it

d= density

@JohnRennie PM=dRT ; how do we know that the density for isochoric process is constant?

@JohnRennie how can we prove the latter part of the statement

@satan29 @JohnRennie yes

n= number density

$\lambda= \dfrac{1}{\sqrt{2}\pi b^2 n}$

$PM=dRT$

@JohnRennie yes on number density. actually inversely proportional

@JohnRennie sorry for delay . first time through laptop

@JohnRennie this one

sorry let me find it

not that

@JohnRennie had a question

@JohnRennie hi

@JohnRennie this one ^^

I have a question @JohnRennie

@JohnRennie hi

Will come back with more questions.

Thanks professor

So B

Angle is $2\pi /3$

@JohnRennie yes

Yes

@JohnRennie yes

@JohnRennie later?

@JohnRennie a confusion

So a is right

@JohnRennie so $t'=t+2\pi/\omega$

@JohnRennie I get it professor

So we need to find the time period that's all.

@JohnRennie yes

dl and r are perpendicular

Yes

@JohnRennie isn't B=$\mu_0 I/2\pi r$ ?

@JohnRennie I don't understand why the magnetic field would be zero. Are talking about motional emf?

@JohnRennie is it readable?

I had a question

@JohnRennie hi