An article demonstrating mathematically how various physical modelling assumptions affect the solution to the seemingly simple problem of the projectile.

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

Explore displacement/time and velocity/time graphs with this mouse motion sensor.

A ball whooshes down a slide and hits another ball which flies off the slide horizontally as a projectile. How far does it go?

How fast would you have to throw a ball upwards so that it would never land?

Where will the spaceman go when he falls through these strange planetary systems?

How high will a ball taking a million seconds to fall travel?

A think about the physics of a motorbike riding upside down

Find out why water is one of the most amazing compounds in the universe and why it is essential for life. - UNDER DEVELOPMENT

Make an accurate diagram of the solar system and explore the concept of a grand conjunction.

Can you work out the natural time scale for the universe?

In which Olympic event does a human travel fastest? Decide which events to include in your Alternative Record Book.

Get some practice using big and small numbers in chemistry.

Gravity on the Moon is about 1/6th that on the Earth. A pole-vaulter 2 metres tall can clear a 5 metres pole on the Earth. How high a pole could he clear on the Moon?

This is the technology section of stemNRICH - Core.

Find the equation from which to calculate the resistance of an infinite network of resistances.

Problems which make you think about the kinetic ideas underlying the ideal gas laws.

A look at the fluid mechanics questions that are raised by the Stonehenge 'bluestones'.

Have you got the Mach knack? Discover the mathematics behind exceeding the sound barrier.

Many physical constants are only known to a certain accuracy. Explore the numerical error bounds in the mass of water and its constituents.

What is an AC voltage? How much power does an AC power source supply?

A look at a fluid mechanics technique called the Steady Flow Momentum Equation.

Investigate why the Lennard-Jones potential gives a good approximate explanation for the behaviour of atoms at close ranges

Can you suggest a curve to fit some experimental data? Can you work out where the data might have come from?

Investigate some of the issues raised by Geiger and Marsden's famous scattering experiment in which they fired alpha particles at a sheet of gold.

Investigate the effects of the half-lifes of the isotopes of cobalt on the mass of a mystery lump of the element.

Look at the units in the expression for the energy levels of the electrons in a hydrogen atom according to the Bohr model.

Explore the Lorentz force law for charges moving in different ways.

See how the motion of the simple pendulum is not-so-simple after all.

engNRICH is the area of the stemNRICH Advanced site devoted to the mathematics underlying the study of engineering

Explore the rates of growth of the sorts of simple polynomials often used in mathematical modelling.

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

Explore the energy of this incredibly energetic particle which struck Earth on October 15th 1991

Work out the numerical values for these physical quantities.

Can you arrange a set of charged particles so that none of them start to move when released from rest?

How does the half-life of a drug affect the build up of medication in the body over time?

Which line graph, equations and physical processes go together?

Which units would you choose best to fit these situations?

When you change the units, do the numbers get bigger or smaller?

Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?

Estimate these curious quantities sufficiently accurately that you can rank them in order of size

Show that even a very powerful spaceship would eventually run out of overtaking power

Explore how can changing the axes for a plot of an equation can lead to different shaped graphs emerging