New posts in Homework And Exercises

Why is the answer different with energy conservation vs forces?

How to unify the cumulant expansion and Feynman diagram expansion?

Energy conservation in reflection of light from a perfect mirror

Levi Civita identity

The Vertical Launch of a Rocket

Calculating the total time elapsed until two pendulums "stop colliding" gives a divergent result

Eigenfunctions and energies of a quadratic-bottom finite square well

Noether's current for dilation transformation

Dot products in spherical polars?

Quantum field theory, interpretation of commutation relation