Physicsyoucantouch.

What physics is, and the units, dimensions and rough numbers it runs on.

Vectors, calculus and honest numbers: the language physics is written in.

Kinematics: where things are, how fast they go, and who is watching.

Every push and pull you have ever felt comes from just four fundamental interactions.

Three short laws that turn forces into predictions.

The force that wears out shoes and also lets you walk in them.

Moving in a circle means accelerating all the time, even at constant speed.

Energy can move between forms, but the books always balance.

Find the one point that moves simply, and the quantity that never changes.

Everything Newton taught us about pushing, rewritten for turning.

The same pull that drops an apple keeps the Moon in its orbit.

Pull it, let go, and watch nature's favourite rhythm appear.

Push on a liquid and it pushes back everywhere at once.

Why solids spring back, liquids bead up and honey pours slowly.

Energy can travel without anything travelling with it.

Pressure ripples that we hear, measure, tune and sometimes break the sound barrier with.

Fringes, colours, haloes and glare: what light does because it is a wave.

Mirrors, prisms and lenses: where light goes when we treat it as rays.

The eye, and the lenses we add to it to see the very small, the very far and the slightly blurred.

Splitting white light into colours, and reading what the colours say about their source.

How people timed the fastest thing there is.

Measuring light the way the eye experiences it.

What 'hot' means, how to put a number on it, and why things grow when they warm.

Pressure, temperature and the gas laws from countless tiny collisions.

Measuring heat: specific heats, latent heats, and the exchange rate between calories and joules.

Energy is conserved; usefulness is not. Engines, entropy and the limits nature sets.

Why gases have two heat capacities, and how molecular shape predicts them.

Conduction, convection and radiation: the three ways heat gets from here to there.

Charge, Coulomb's law, and the fields and potentials charges create.

The flux through a closed surface counts the charge inside.

Storing charge and energy between two conductors.

Moving charge, resistance and the circuits built from them.

Currents that heat, pump heat, and move matter.

A field that pushes only on moving charges.

How currents make magnetic fields.

Poles, bar magnets, the Earth's field and the instruments that measure them.

How materials respond to magnetic fields.

Changing magnetic flux makes emf.

Currents that swing back and forth, and the machines that make and use them.

Light as travelling electric and magnetic fields.

Glowing tubes, cathode rays, the electron, and vacuum valves.

Light as particles, and particles as waves.

From the nuclear atom to quantum states and lasers.

Radiation that sees through flesh and maps atoms.

From energy bands to logic gates.

Binding, decay, fission and fusion.

Two postulates that reshape space and time.