New posts in Approximations

Near Earth vs Newtonian gravitational potential

Is $\pi^2 \approx g$ a coincidence?

Validity of mean-field approximation

Why do we still use perturbation theory, when we have advanced numerical methods and fast computers?

Is Torricelli's law "wrong" for big holes? - Tank draining problem

What will be the equation of motion of driven pendulum for amplitudes beyond the small angle approximation?

Quasiclassical QM for centrally symmetric fields

WKB method of approximation

How is the Saddle point approximation used in physics?