Graham's Law · rate ∝ 1/√M
unseel.com · effusion · light gas escapes faster · kinetic theory
He escaped 0
SF₆ escaped 0
phase
Helium · M = 4 (light & fast)
SF₆ · M = 146 (heavy & slow)
Pinhole (hole ≪ mean free path)
Vacuum — molecules stream out
Unseel.com · Graham's Law of Effusion