The Elegance of Physics in Everyday Life

Physics is the secret code that explains why massive steel ships float. It’s not magic;

it’s Archimedes' principle. An object will float if it displaces a weight of water

equal to its own. That's why ships are mostly hollow! This same hidden logic keeps bridges

from breaking. They have expansion joints because materials swell when heated, preventing them

from buckling on a hot day. Everything from a vibrating guitar string to a swinging

pendulum follows these simple, elegant rules. Once you understand the basics of pressure,

buoyancy, and motion, you start seeing the world as one giant,

solvable physics problem.