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Author Question: An external heat source supplies thermal energy through heating to a system at a rate of 187 W as ... (Read 78 times)

maegan_martin

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on: Jul 29, 2018
An external heat source supplies thermal energy through heating to a system at a rate of 187 W as the environment does work on the system at a rate of -131 W. At what rate is the internal (thermal) energy of the system changing?
 
  A) -56 W
  B) 320 W
  C) 56 W
  D) 190 W
  E) -320 W

Question 2

A tube of mercury with resistivity 9.84  10-7   m has a uniform electric field of 23 N/C inside the mercury. What is the current through the tube, if the radius of the tube is 0.495 mm?
 
  A) 18 A
  B) 180 A
  C) 29 A
  D) 280 A


jrpg123456

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Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

A


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maegan_martin

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Reply #2 on: Jul 29, 2018
TY


jrpg123456

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Reply #3 on: Jul 29, 2018
You're welcome


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