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Author Question: Two ideal Carnot heat engines have the same efficiency. One operates between 5.0 102 K and 3.0 102 ... (Read 108 times)

ishan

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Two ideal Carnot heat engines have the same efficiency. One operates between 5.0  102 K and 3.0  102 K, and the other between 4.0  102 K and some lower temperature. What is the lower temperature?
 
  A) 200 K
  B) 220 K
  C) 240 K
  D) 260 K
  E) 280 K

Question 2

An ideal parallel-plate capacitor consists of two parallel plates of area A separated by a distance d. This capacitor is connected to a battery that maintains a constant potential difference across the plates.
 
  If the separation between the plates is now doubled, the amount of electrical energy stored on the capacitor will A) double.
  B) quadruple.
  C) be cut in half.
  D) be cut in fourth.
  E) not change.


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welcom1000

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ishan

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Reply 2 on: Jul 29, 2018
Wow, this really help


DylanD1323

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Reply 3 on: Yesterday
Excellent

 

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