P=ρgh
This equation is the reason you feel pressure when you go deep in a fluid. P is the pressure rho is how thick the fluid is g is gravity and h is how far down you are.
Why does my ear hurt so much? It’s the fluid pressure equation making me suffer.
This equation is why my feet are sore from swimming so long.
I’m like a fish in the ocean. Or I would be if I wasn’t being crushed by the fluid pressure equation.