Surface water always flows downhill. The answer is A.downhill
Longitudinal waves move parallel to the direction of wave motion.
Transverse move perpendicular.
This means that balls with a diamenter of 2.25 inches cannot have any imperfections (bumps or dents) greater than 0.005 inches. In other words, the bump or dent to diameter ratio cannot exceed 0.005/2.25 = 0.0022222
I have no idea what your question is...
