It appears raj87verma88 was upset about others presenting information on the fluid mechanics of sand and has now closed the thread. Anyone want to continue the debate? Link: #-Link-Snipped-# Take...

Simple definition: A fluid is something that flows. I would definetly call flowing sand a fluid. The absolute viscosity would probably be very high. Here are a few more non-traditional...

Using the constant acceleration eq: v^2 = vo^2 + 2a(x - xo) if you begin the fall with zero velocity and also call the initial x reference zero then the...