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Author Question: An aluminum electric tea kettle with a mass of 500 g is heated with a 500-W heating coil. How long ... (Read 76 times)

ec501234

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An aluminum electric tea kettle with a mass of 500 g is heated with a 500-W heating coil. How long will it take to heat up 1.0 kg of water from 18C to 98C in the tea kettle?
 
  The specific heat of aluminum is 900 J/kg  K and that of water is 4186 J/kg  K.
  A) 5.0 minutes
  B) 7.0 minutes
  C) 12 minutes
  D) 15 minutes
  E) 18 minutes

Question 2

A 120-V rms signal at 60.0 Hz is applied across a series combination of a 30.0-mH inductor and a resistor. If the rms value of the current in this circuit is 0.600 A, what is the resistance of the resistor?
 
  A) 200  B) 143  C) 80.0  D) 30.0  E) 268


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k2629

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ec501234

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Reply 2 on: Jul 29, 2018
Excellent


xoxo123

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Reply 3 on: Yesterday
Gracias!

 

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