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May
21
awarded  Notable Question
May
4
comment Two solutions, A+ and A-, for masses connected via springs
Basically, we want to find $A_j$ as a function of $j$. It turns out that both $A_j=A_+ e^{i\theta j}$ and $A_j=A_- e^{-i\theta j}$ work, for some $A_+$, $A_-$, and $\theta$ independent of $j$. You should be able to find $\theta$ in terms of $\omega$ and $\omega_0$.
May
3
comment Graph of energy stored in capacitor?
Let us continue this discussion in chat.
May
3
comment Graph of energy stored in capacitor?
Try starting with $Q=Q_0-It$, where $Q_0$ is the initial charge the capacitor has.
May
3
comment Graph of energy stored in capacitor?
Alternatively, you can write up your own answer, and show us how you can get correct graph.
May
3
comment Graph of energy stored in capacitor?
The equation $Q=It$ is incorrect, since $Q$ should be nonzero when $t=0$.
May
3
awarded  Popular Question
Apr
29
comment what experiments can be used to distinguish between s-wave and d-wave superconductivity?
This might be relevant too: van Harlinger, Rev. Mod. Phys. 67, 515 (1995) dx.doi.org/10.1103/RevModPhys.67.515
Apr
27
awarded  Popular Question
Apr
22
awarded  Popular Question
Apr
7
comment Does changing the electric / magnetic field cause self-reinforcing induction of the other?
@LandosAdam In this situation, you can think of the fields repeatedly producing each other. But ultimately, the total electric fields and the total magnetic fields have to satisfy Maxwell's equations.
Apr
4
revised Precisely speaking, does photon become massive or the phonon become massive, due to Higgs mechanism in superconductor?
grammer, typo
Apr
4
suggested approved edit on Precisely speaking, does photon become massive or the phonon become massive, due to Higgs mechanism in superconductor?
Apr
4
comment Does changing the electric / magnetic field cause self-reinforcing induction of the other?
@LandosAdam I find it confusing to think about electric and magnetic fields producing each other. What we know about these fields is encapsulated in Maxwell's equations. These equations do not talk about one producing the other, or one changing in response to the other. The equations only say that whenever the magnetic field is changing, so is the electric field, and vice versa.
Mar
17
awarded  Popular Question
Mar
12
awarded  Popular Question
Feb
28
awarded  Yearling
Oct
30
asked Negative pressure experiments
Sep
9
reviewed No Action Needed Searching for Big Bang Neutrinos
Sep
9
revised Particle-hole symmetry and the sign of the superconducting gap
Spell out acronym