Recent content by lonewolf219

jtbell, Yes, the student should have completed their thesis and defended by now (2010 entry into program). They were an RA up until January 2018, when they became a TA again.

jtbell, thanks for post... I guess there are a few more details that I didn't share but I am still going to stay out of it. The student was supposed to have graduated by now. The student has said they won't work weekends or at home, and that the department is only really paying for thirty...

ZapperZ, Ok, thank you for the reply. It is only one student I am speaking of in the office. It genuinely bothers me because I feel like this student is taking advantage of the situation. But, I agree that it is between the student and the department. There is some snoring throughout the...

Hi, I am a grad student and share an office with 4 other grad students. I have a question about one of the students. We have been in the same office for 2 yrs. The student mostly sleeps while they are here. Every day this week, the student has slept from almost the moment they get in. I...

Excellent! Thank you! We had a debate in class about this one, I appreciate your reply

Is the potential across the boundary continuous for a dielectric sphere embedded in a dielectric material, so that the potential inside the sphere can be set equal to the potential outside of it at r=R ?

Homework Statement Hi, I can't seem to understand the following formula in my professor's lecture notes: F_αβ = g_αγ*g_βδ*F^(γδ) Homework Equations Where g_αβ is the diagonal matrix in 4 dimensions with g_00 = 1 and g_11 = g_22 = g_33 = -1 and F^(γδ) is the electromagnetic tensor with c=1...

Homework Statement The Clebsh Gordon coefficient is < 11;00 |11> = < l_1,m_1;l_2m_2 | kq > Homework Equations My professor determined the CG to be 1 The Attempt at a Solution How do we look up these numbers in the table? What is the direct product basis? 1x1? What is JM and what is m_1 and...

Dr. Claude, thank you for posting... !

Thanks for the replies, sorry I am a little late here... I am curious about testing hydrogen gas. I was thinking about the infra red non contact thermometers, yes, you are right Zapper Z. But I think those can only be measured on a surface, is that correct? If I used a real IR laser, could it...

I am thinking about a possible experiment, and would like to measure the temperature of gas in various places inside of a glass enclosure. Is it possible to use an infrared laser to this? Thanks

Shyan, OK, thanks for your post. I think I see what you mean... the emf defined here as a change in the magnetic flux only applies for motional emf? There are other ways to generate emf... Does Faraday's Law then mean that whenever we have a changing magnetic field, we have an emf?

Thanks Shyan. ε=-\frac{d\Phi}{dt}, so a changing magnetic flux creates an electromotive force, is that right?

I'm taking E & M II... Would anyone agree that the following statements are true? An electric field changing in time gives rise to a displacement current. A magnetic field changing in time gives rise to an electromotive force.

Vanadium 50, thanks for your perspective ... Your wisdom is always appreciated !