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Author Question: Some light switches that glow in the dark after the lights are turned off employ A) fluorescence. ... (Read 50 times)

audie

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on: Jul 29, 2018
Some light switches that glow in the dark after the lights are turned off employ
 
  A) fluorescence.
  B) resonance.
  C) incandescence.
  D) all of the above
  E) none of the above

Question 2

An aluminum electric tea kettle has a mass of 500 g. It has 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/(kgK).
 
  A) 5 minutes
  B) 7 minutes
  C) 12 minutes
  D) 15 minutes
  E) 18 minutes


Juro

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

Answer: E

Answer to Question 2

C


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audie

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Reply #2 on: Jul 29, 2018
TY


Juro

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


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