Darcy's law (Physical Hydrology Lecture 3 part 1)
31:28
Physical Hydrology Lecture 3 part 2: Groundwater
11:53
Soil Permeability - Darcy's Law
19:45
Hydrogeology 101: Introduction to Groundwater Flow
13:26
Darcy's law
20:04
Basics of Groundwater Hydrology by Dr. Garey Fox
21:25
How Every Country Got Nuclear Weapons Explained
50:48
Gravitation' by Richard Feynman [1080p HD Video with clear audio]
33:37