Science
What Is Dark Matter? The Universe's Missing Mass
Dark matter is an invisible form of mass that appears to outweigh ordinary matter several times over. We infer it from gravity…
#Physics
Stories tagged “Physics”.
13 stories
Technology
What Is Quantum Computing? A Beginner's Guide
Quantum computers use the strange rules of quantum physics to process information in a fundamentally different way. Here is what…
Science
Why Is the Sky Blue? The Physics of Scattered Light
The daytime sky is blue because air molecules scatter the shorter, bluer wavelengths of sunlight far more strongly than the…
Science
How Do Planes Fly?
A plane flies by balancing four forces: lift pushes it up, weight pulls it down, thrust drives it forward and drag holds it back…
Science
What Is Gravity?
Gravity is the attraction between anything that has mass, from an apple to a galaxy. Here is how Newton and Einstein each…
Science
What Is Electricity?
Electricity powers nearly everything we use, yet few of us could say what it actually is. This guide explains electric charge…
Science
How Do Magnets Work?
Magnets pull and push without touching, yet the reason why is rooted in the behaviour of electrons. This guide explains magnetic…
Science
How Does GPS Work?
GPS pinpoints your location by timing radio signals from a fleet of satellites orbiting thousands of miles overhead. Here is the…
Science
What Is Condensation?
Misty windows, dewy grass and the drops on a cold drink are all condensation at work. This guide explains what condensation is…
Science
What Is the Doppler Effect?
Why does an ambulance siren drop in pitch as it speeds past? The answer is the Doppler effect. This guide explains how it works…
Science
What Is Density?
Density is how much mass is packed into a given volume of a substance. This guide explains the simple formula, why a kilogram of…
Science
What Is Friction?
Friction is the force that resists movement when two surfaces touch. This guide explains where it comes from, the difference…
Science
What Is the Speed of Sound?
The speed of sound is how fast a sound wave travels through a material. This guide explains why it is roughly 343 metres per…