When the upper leeward slope stops, the angle of the pile of sand dunes is:
Q1. When the upper leeward slope stops, the angle of the pile of sand dunes is:
Answer: 33-34 degrees
Explanation: The angle of repose for sand — the steepest angle at which the leeward slip face of a dune remains stable — is typically 33–34 degrees, after which the grains avalanche down.