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Author Question: Which of the following is a consequence of the laws of thermodynamics? A.Heat can be completely ... (Read 23 times)

Starlight

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on: Jul 28, 2018
Which of the following is a consequence of the laws of thermodynamics?
  A.Heat can be completely changed into work
  B.Heat transfers from a cold object to a hot object until equilibrium is reached
 

C.Atoms can be at any temperature, even absolute zero
  D.Work can be completely changed into heat



Question 2

Which of the following scientists is most directly responsible for ushering in the communications age in the 20th century?
 
  A. Galileo
 

B. Newton
  C. Maxwell
  D. Michelson
  E. Carnot


 


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cat123

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Reply #1 on: Jul 28, 2018
Answer to Question 1

Work can be completely changed into heat by the second law of thermodynamics. Heat engines with 100 efficiency are prohibited, but the prohibited part is changing heat into work. To understand this example, imagine dragging a box along the ground with a constant force. The work put into the system accelerates the box against the force of friction, but eventually friction slows the box to a complete stop. The friction basically turns the energy of the box into heat.

Answer to Question 2

Maxwell's work in unifying the equations for electricity and magnetism helped bring about many of the innovations dealing with electromagnetic radiation that make our lives easier on a daily basis. His work helped with the development of fiber optic communication that makes nearly instantaneous global connection possible


Starlight

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Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


cat123

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Reply #3 on: Jul 28, 2018
Great! Please up vote :D


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