# 1st and 2nd order linear differential equations with constant coefficients

**5**NRICH Mathematical resources connected to

**1st and 2nd order linear differential equations with constant coefficients**

problem

### Differential electricity

As a capacitor discharges, its charge changes continuously. Find
the differential equation governing this variation.

problem

### The real hydrogen atom

Dip your toe into the world of quantum mechanics by looking at the
Schrodinger equation for hydrogen atoms

problem

Favourite

### The not-so-simple pendulum 2

Things are roughened up and friction is now added to the
approximate simple pendulum

problem

Favourite

### Differential equation matcher

Match the descriptions of physical processes to these differential
equations.