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 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? 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 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 Sep 9 suggested approved edit on Particle-hole symmetry and the sign of the superconducting gap Sep 4 revised Current in an RC circuit inside in a magnetic field added one tag