# Resources tagged with: Differential equations

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There are 13 NRICH Mathematical resources connected to Differential equations, you may find related items under Calculus.

Broad Topics > Calculus > Differential equations ### The Not-so-simple Pendulum 2

##### Age 16 to 18Challenge Level

Things are roughened up and friction is now added to the approximate simple pendulum ### The Not-so-simple Pendulum 1

##### Age 16 to 18Challenge Level

See how the motion of the simple pendulum is not-so-simple after all. ### Taking Trigonometry Series-ly

##### Age 16 to 18Challenge Level

Look at the advanced way of viewing sin and cos through their power series. ### Differential Equation Matcher

##### Age 16 to 18Challenge Level

Match the descriptions of physical processes to these differential equations. ### It's Only a Minus Sign

##### Age 16 to 18Challenge Level

Solve these differential equations to see how a minus sign can change the answer ### Bird-brained

##### Age 16 to 18Challenge Level

How many eggs should a bird lay to maximise the number of chicks that will hatch? An introduction to optimisation. ### Modelling Assumptions in Mechanics

##### Age 16 to 18

An article demonstrating mathematically how various physical modelling assumptions affect the solution to the seemingly simple problem of the projectile. ### The Real Hydrogen Atom

##### Age 16 to 18Challenge Level

Dip your toe into the world of quantum mechanics by looking at the Schrodinger equation for hydrogen atoms ### Predator - Prey Systems

##### Age 16 to 18Challenge Level

See how differential equations might be used to make a realistic model of a system containing predators and their prey. ### Bessel's Equation

##### Age 16 to 18Challenge Level

Get further into power series using the fascinating Bessel's equation. ### What's My Equation?

##### Age 16 to 18Challenge Level

Can you find the differential equations giving rise to these famous solutions? ### Reaction Rates

##### Age 16 to 18Challenge Level

Explore the possibilities for reaction rates versus concentrations with this non-linear differential equation ### Earth Orbit

##### Age 16 to 18Challenge Level

Follow in the steps of Newton and find the path that the earth follows around the sun.