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Chapter 1, Problem 14RQ

Which prong on a three-prong plug is the ground?

  1. a. the left flat prong
  2. b. the right flat prong
  3. c. the center semicircular prong
  4. d. none of the above
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Mechanical advantage is the ratio of effort to load.a) Trueb) False
use lamp=81kg, AB=5mm, BC=8mm
The statment is true or false?
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