the.com/hydrodynamics
The physics of why your boat wobbles and your bath towel never stays folded in the tub.
means The branch of physics that studies how liquids move and behave, and how forces act on things moving through them.
from Built from Greek 'hydro-' (water) and 'dynamis' (power, force) — the same 'dynamis' that gives us 'dynamic' and 'dynamite'. The term emerged as mathematicians and physicists split the older study of fluids into 'hydrostatics' (fluids at rest) and 'hydrodynamics' (fluids in motion), formalizing what sailors and millwrights had long known by feel into equations.
- core idea
- studies forces on fluids in motion, not at rest
- key equation
- Navier-Stokes still unsolved for a million dollars
- real use
- explains why golf balls have dimples
- fun fact
- blood flow in arteries obeys the same math