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For the seed above, the sphericity is

  • A.0.50
  • B.0.58
  • C.0.25
  • D.0.80

Answer: A

Sphericity is the geometric mean diameter divided by the largest dimension, \( 4.0/8.0 = 0.50 \). An elongated seed of this kind rolls poorly, and its angle of repose is correspondingly higher than that of a near-spherical grain.

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