List questions from physics

Published on 29 Mar 2026 - 6:02

720

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Derivation check of a parabolic trajectory problem

Published on 10 May 2020 - 18:41

606

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A simple geometric problem, solving $f'(x)=\frac{f(x)}{\sqrt{r(x)^2-f(x)^2}}$, given $r(x)$.

Published on 11 May 2020 - 5:33

821

Views

Proof that $\epsilon_{ijk}$ is the same as the determinant of the Kronecker delta

Published on 11 May 2020 - 18:34

65

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Why is the integral of this term zero?

Published on 25 Mar 2026 - 12:24

40

Views

Solution of the Wave Equation by Separation of Variables

Published on 29 Mar 2026 - 6:02

277

Views

Why is it nice to be able to “add in quadrature” [$f(x+y)^2 = f(x)^2 + f(y)^2$]?

Published on 12 May 2020 - 22:45

45

Views

Wave equation solution $u(x,t)$ for $u_0(x)=x$ and $v_0(x)=0$

Published on 29 Mar 2026 - 6:02

1.8k

Views

Pushforward and Pullback Applied to Composition of Maps

Published on 23 Feb 2026 - 9:59

384

Views

How are the different definitions of a tensor the same definition?

Published on 30 Mar 2026 - 1:50

1.7k

Views

Show that $[\hat L_x,\hat L_y]=i\hbar \hat L_z$

Published on 29 Mar 2026 - 8:21

91

Views

Voltage difference in electrical network

Published on 25 Mar 2026 - 17:35

101

Views

Derivation of a Dubious Solution of a Diffusion Equation in Polar Coordinates

Published on 01 Apr 2026 - 11:53

1.4k

Views

How to calculate the inertia tensor for a cuboid with non-uniform mass distribution?

Published on 30 Mar 2026 - 1:47

203

Views

Damping procedure for Gross-Pitaevskii equation applied to an ODE

Published on 29 Mar 2026 - 16:20

List Question

Let a string with linear density $\rho$ and tension $k$. Find $u(x,t)$

Derivation check of a parabolic trajectory problem

A simple geometric problem, solving $f'(x)=\frac{f(x)}{\sqrt{r(x)^2-f(x)^2}}$, given $r(x)$.

Proof that $\epsilon_{ijk}$ is the same as the determinant of the Kronecker delta

Why is the integral of this term zero?

Solution of the Wave Equation by Separation of Variables

Why is it nice to be able to “add in quadrature” [$f(x+y)^2 = f(x)^2 + f(y)^2$]?

Wave equation solution $u(x,t)$ for $u_0(x)=x$ and $v_0(x)=0$

Pushforward and Pullback Applied to Composition of Maps

How are the different definitions of a tensor the same definition?

Show that $[\hat L_x,\hat L_y]=i\hbar \hat L_z$

Voltage difference in electrical network

Derivation of a Dubious Solution of a Diffusion Equation in Polar Coordinates

How to calculate the inertia tensor for a cuboid with non-uniform mass distribution?

Damping procedure for Gross-Pitaevskii equation applied to an ODE

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