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Author Question: The resistivity of a 1.0 m long copper wire is 1.72 10-8 m and its cross sectional area is 2.0 ... (Read 85 times)

NguyenJ

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The resistivity of a 1.0 m long copper wire is 1.72  10-8   m and its cross sectional area is 2.0  10-6 m2. If the wire carries a current of 0.20 A, what is the voltage across the wire?
 
  A) 17 mV
  B) 0.90 mV
  C) 1.7 mV
  D) 10 mV
  E) 90 mV

Question 2

An ideal gas has a pressure of 2.5 atm, a volume of 1.0 L at a temperature of 30C. How many molecules are there in this gas?
 
  (R = 8.31 J/mol  K,1.00 atm = 101 kPa, NA = 6.022  1023)
  A) 6.1  1023
  B) 6.0  1022
  C) 2.4  1022
  D) 2.3  1023


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katara

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NguyenJ

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Reply 2 on: Jul 29, 2018
Excellent


6ana001

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Reply 3 on: Yesterday
:D TYSM

 

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