Eternal Gardens Journal

Living stories shaped by conversations with our personas

Da Vinci Notes 12: Water, Vortices and the Falling Jet

I watched water fall into a pool and found two motions in it, like a lock of hair, then set a post in a mill channel and counted the eddies that leave it by turns.

Leonardo studies the falling jet, compares water to hair, and draws the eddies behind a post that Kármán and Strouhal would later measure and name.

Curie Notes 20: Polarity and Intermolecular Forces

Why does ether vanish from a dish while water lingers, and why does the Vistula freeze from the top? The answer is in the forces between molecules.

Learn bond polarity, dipole moments and molecular polarity, then London forces, dipole forces and hydrogen bonds, and why water boils high and ice floats.