Recent content by Eitan Levy

That's what I figured! Is the solution wrong?

I don't understand how this can be solved. The official solution was: F=\sigma*T^4 E=F*4\pi R^2*60*60 This doesn't make sense to me, as it seems to imply that the energy that the black body radiates depends on the radius of the shell. For a very large shell the body will reflect...

(Angstram)^{-1}

I divided the first equation by the second: \frac{1}{k}tan(kb)=-\frac{1}{\alpha} And I plugged in the numbers. No units were provided.

Is the answer 0.08763*10^(10)?

What I tried to do was using the fact that the wave function should be continuous. Asin(kb)=Be^{-\alpha b} The derivative also should be continuous: kAcos(kb)=-\alpha Be^{-\alpha b} And the probability to find the particle in total should be 1: \int_0^b A^2sin^2(kx) dx + \int_b^{\infty}...

My problem is that "width of energy level" was never defined in my class so I don't know how to proceed.

First, it is easy to see that n=4 after the collision because: E_1=-13.6\frac{1^2}{1^2}eV=-13.6eV E_4=-13.6\frac{1^2}{4^2}eV=-0.85eV E_5=-13.6\frac{z^2}{5^2}eV=-0.544eVBut, I never saw a definition for the width of an energy level. I tried to use something I saw online that said it was...

This is supposed to be very basic, where the loop is held there is a declining magnetic field in direction (-z), therefore the current is supposed to be clockwise. However in the answers it is said the the current is anti clockwise. That doesn't make sense to me. Is there a mistake in the answers?

One question about this - does the energy must be continuous in the entire circuit or in the inductor itself? Can the energy completely "disappear" from the inductor instantly, while moving somewhere else?

One more thing regarding the original question. How did you know that on the grounded part the charge is 0?

One question: When are the charges free to move and when are they "pasted"?

I am sorry but I don't understand. I really don't know at all how to analyze this. If you are willing to do so please write how to analyze this probably. It will help me tremendously, I have already wasted hours on trying to understand this. EDIT: Let me elaborate. Let me elaborate. If the...

Well, then I assume that for the outer plates the charge is entirely on the lower part. The only way I am able to understand this is by thinking about the upper part of the middle plates and the lower part of each outer plate to be capacitors. So if each side of the middle plate has the charge...

This is not a homework question but something that bugs me a bit. My professor has stated that the electric field inside a conductor is 0. This I understand. However, he has also said that even if the conductor has some hole in it, the electric field inside this hole is also 0 Now, two...