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Author Question: There is a 10-A current through a wire for 2.0 min. (e = 1.60 10-19 C) (a) How much charge has ... (Read 42 times)

jparksx

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on: Jul 29, 2018
There is a 10-A current through a wire for 2.0 min. (e = 1.60  10-19 C)
 
  (a) How much charge has passed through this wire?
  (b) How many electrons have passed any point in the wire?

Question 2

A 771.0-kg copper bar is put into a smelter for melting. The initial temperature of the copper is 300.0 K.
 
  How much thermal energy must the smelter produce to completely melt the copper bar? The specific heat for copper is 386 J/kgK, the heat of fusion for copper is 205,000 J/kg, and its melting point is 1357 K. A) 4.73  105 kJ
  B) 3.15  1011 kJ
  C) 3.15  108 kJ
  D) 5.62  105 kJ


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marict

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

(a) 1200 C (b) 7.5  1021

Answer to Question 2

A


jparksx

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Reply 2 on: Jul 29, 2018
Excellent

cici

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Reply 3 on: Yesterday
Gracias!

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