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I was watching Leonard Susskind's video series on quantum entanglement, where he looks at the spins of two electrons. In particular, there are entangled states of the form $$alphaleft|uparrow...
Asked on 11/28/2020 by suissidle
1 answerThe skyrmion number is defined as$$n=frac{1}{4pi}intmathbf{M}cdotleft(frac{partialmathbf{M}}{partial x}timesfrac{partialmathbf{M}}{partial y}right)dxdy$$where $n$ is the topological index, $mathbf {M}$ is the unit vector in the direction of the...
Asked on 11/28/2020 by Eric Z
1 answerAs we are waiting in the subway station, we will hear the rail screeching when the train is arriving. Is it because soundwaves travels faster in a solid substance than...
Asked on 11/28/2020 by 00xxqhxx00
1 answerAccording to my physics book, all materials could manifest diamagnetic effects (it is a consequence of Faraday's law of electromagnetic induction). However due to the presence of intrinsic magnetic moments...
Asked on 11/28/2020 by Angelo Giannuzzi
0 answerthis is my first post here. I hope I do and format everything correctly. I was given a spreadsheet which was automatically created and filled by a ...
Asked on 11/28/2020 by hiwifgf
2 answerIn Griffiths' book "Introduction to Electrodynamics", section $4.4$ on "Linear Dielectrics", he says that in a homogeneous linear dielectric we have $$boldsymbol{nabla}cdotboldsymbol{D}=rho_{rm f} :::{rm and}::: boldsymbol{nabla}timesboldsymbol{D}=0$$ Then he concludes...
Asked on 11/28/2020
1 answerIf I put a magnet in a box of nails, it attracts lots of nails. If I put a hydrogen atom missing its electron (a hydron) near a bunch of...
Asked on 11/28/2020 by BarrettNashville
3 answerI have a series of individual (time) measurements with a certain uncertainty each per measurement, which is the same for all the measurements (±one frame). I have understood that the...
Asked on 11/28/2020 by Michael L
0 answerI studied a sciences of climate change module with the OU a while ago, I'm half remembering something that's bugging me and wonder whether any could help provide some clarification?...
Asked on 11/28/2020 by Prof.Frinkahedron
1 answerEddy currents will flow in closed loops within a conductor this I understand. When a coil is used for induction heating why doesn’t the coil itself become heated due to...
Asked on 11/28/2020
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