Author Question: How long is a wire made from 200 cm3 of copper if its resistance is 8.5 ohms? The resistivity of ... (Read 45 times)

jayhills49

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How long is a wire made from 200 cm3 of copper if its resistance is 8.5 ohms? The resistivity of copper is 1.7  105 Wm.
 a. 10 m
  c. 7.1 m
  b. 2.2  102 m
  d. 3.0  103 m

Question 2

A rotating flywheel can be used as a method to store energy. If it has 2.0  106 J of kinetic energy when rotating at 400 rad/s, and if a frictional torque of 4.0 Nm acts on the system, in what interval of time would the flywheel come to rest?
 a. 3.5 min
  c. 14 min
  b. 42 min
  d. 21 min



tennis14576

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Answer to Question 1

A

Answer to Question 2

B



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jayhills49

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Both answers were spot on, thank you once again




 

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