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Author Question: The charge carried by one electron is e = -1.6 10-19 C. The number of excess electrons necessary to ... (Read 66 times)

cnetterville

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on: Jul 27, 2018
The charge carried by one electron is e = -1.6  10-19 C. The number of excess electrons necessary to produce a charge of 1.0 C is
 
  A) 6.3  1018.
  B) 1.6  1019.
  C) 6.3  109.
  D) 6.3  106.
  E) 1.6  1018.

Question 2

One of the most efficient engines built so far has the following characteristics: combustion chamber temperature = 1900C; exhaust temperature = 430C. 7  109 cal of fuel produces 1.4  1010 J of work in one hour.
 
  (a) What is the actual efficiency of this engine?
  (b) What is the Carnot efficiency of this engine?


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ilianabrrr

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Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

(a) 48
(b) 68


cnetterville

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Reply 2 on: Jul 27, 2018
Gracias!

duy1981999

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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