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Author Question: The second law of thermodynamics implies that a) heat can be used to do work only if a thermal ... (Read 70 times)

naturalchemist

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on: Jul 28, 2018
The second law of thermodynamics implies
  that
  a) heat can be used to do work only if a thermal reservoir at a lower temperature is available.
  b) the total energy of a body is the sum of kinetic energies of all its molecules.
  c) bodies cool at rates proportional to their temperature excess above their surroundings.
  d) energy cannot be destroyed.

Question 2

A uniform rod (length = 2.0 m) is mounted to rotate freely about a horizontal axis that is perpendicular to the rod and that passes through the rod at a point 0.50 m from one end of the rod. If the rod is released from rest in a horizontal position, what is the angular speed of the rod as it rotates through its lowest position?
 a. 3.5 rad/s
  b. 3.8 rad/s
  c. 4.1 rad/s
  d. 2.0 rad/s
  e. 5.6 rad/s


eliasc0401

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

a

Answer to Question 2

c


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naturalchemist

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


eliasc0401

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


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