The work done by the centripetal force F when a body completes one revolution around a circle of radius R is:

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• A system absorbs 80 J through heating while doing 100 J of external work. What is the change in the internal energy of the system?

  (A) -100 J
  (B) -20 J
  (C) +80 J
  (D) +180 J

  ►Correct Option
  
  Correct Option is: B
  

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