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Author Question: Three small masses are positioned as follows: 2.0 kg at (0.0 m, 0.0 m), 2.0 kg at (2.0 m, 0.0 m), ... (Read 86 times)

sheilaspns

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Three small masses are positioned as follows: 2.0 kg at (0.0 m, 0.0 m), 2.0 kg at (2.0 m, 0.0 m), and 4.0 kg at (2.0 m, 1.0 m). Determine the coordinates of the center of mass (or center of gravity) of this system.
 
  A) (0.50 m, 1.5 m)
  B) (1.5 m, 0.50 m)
  C) (2.5 m, 1.5 m)
  D) (2.5 m, 0.50 m)

Question 2

The hot shot heat engine operating between 40C and 380C has an efficiency that is 60 of that of an ideal Carnot engine operating between the same temperatures.
 
  If the hot shot engine absorbs heat at a rate of 60 kW, at what rate does it exhaust heat? A) 36 kW
  B) 41 kW
  C) 57 kW
  D) 60 kW


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smrerig

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