Recent content by luriol

This is a poorly worded problem, which makes it confusing. What they mean is that the dipole is placed in an electric field -> while a torque of 0.1N/m is applied to it <-. Under the influence of the torque it remains at some unknown angle theta. After the torque is released it returns to its...

I wasn't using Wiley plus to save time on grading. The class size is only 30 (although grading 30 papers is still a bit of a pain) I was using Wiley plus mainly because a lot of the students were submitting copies of each others homework, and with on-line homework they at least all got different...

The difference has to do with angular momentum. For a hydrogen atom, with only one electron, the different values of n have different energies, but all the possible angular momentum states consistent with that n have the same energy. For multi-electron atoms, the hydrogenic solutions are...

Recently most of the physics textbook companies have been pushing on-line homework systems to accompany their books. (e.g. Wiley plus). I've tried assigning these to my class, and while I thought the on-line problems were good, the students absolutely hated them, and furthermore I found zero...

Although, you can get even closer to absolute zero (around 1 billionth of a degree) using optical cooling. See for example http://www.eurekalert.org/pub_releases/2003-09/miot-mta090903.php

If you displace a section of a liquid in the transverse direction there is no change in the energy of the liquid, since no chemical bonds are being stretched. Thus there is no restoring force, and no transverse mode.