Good hang-gliding conditions require
A) thermal turbulence.
B) upward air motions.
C) molecular viscosity.

Question

Quizplus · Accepted Answer

Hang-gliding requires upward air motions, also known as thermals, in order to stay aloft. Thermal turbulence can be a helpful indicator of these upward air currents, but it is not a necessary condition in itself. Molecular viscosity, which refers to the resistance of a fluid to flow, is not relevant to hang-gliding conditions.

Good Hang-Gliding Conditions Require