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State whether the following is true or false.
The pound mass and the pound force are the same unit.

  • A.True only at large scales
  • B.False only at small scales
  • C.True
  • D.False

Answer: D

One measures mass and the other force, and the conversion between them involves the acceleration due to gravity through the factor conventionally called g sub c. Confusing them is the classic hazard of the imperial system.

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