Thermodynamics
Heat Transfer: Conduction, Convection and Radiation
Heat always flows from hot to cold, but it travels by three very different routes, and knowing which one is…
Thermodynamics
Electromagnetism
Electromagnetic Induction
Move a magnet near a coil and a voltage appears from nothing — this is the simple, profound trick behind…
Modern Physics
The Heisenberg Uncertainty Principle
Nature sets a hard limit on how precisely you can know a particle's position and momentum at once — not…
Kinematics
The SUVAT Equations
Five letters and four equations let you solve almost any problem of motion under constant acceleration — from a dropped…
Classical Mechanics
Centre of Mass
Every object behaves, for the purposes of motion, as if all its mass were squeezed into a single magic point…
Modern Physics
Radioactive Decay
Unstable atomic nuclei transform at random, yet vast collections of them obey a clockwork law precise enough to date the…
Classical Mechanics
Tension Force
A rope cannot push, only pull — and that single rule explains how ropes, cables and strings transmit force across…
Kinematics
Why Is Projectile Motion a Parabola?
Throw anything through the air and it traces the same elegant curve — and the reason is a simple separation…
Classical Mechanics
Normal Force Explained
The invisible push a surface gives back when you press on it is the normal force — and it is…
Thermodynamics
The Kinetic Theory of Gases
Temperature, pressure and the gas laws all emerge from one simple picture — countless tiny molecules flying about and bouncing…