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Author Question: A spear is thrown at you at a very high speed. As it passes, you measure its length as one-half its ... (Read 127 times)

strangeaffliction

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on: Jul 27, 2018
A spear is thrown at you at a very high speed. As it passes, you measure its length as one-half its normal length. From this measurement, you conclude that the moving spear's mass must be
 
  A) one-half its rest mass.
  B) twice its rest mass.
  C) four times its rest mass.
  D) zero.

Question 2

A series RC circuit has resistance of 150  and capacitance of 40. F. It is driven by a 120. V, 60. Hz source.
 
  (a) How much power is dissipated in the resistor?
  (b) How much power is dissipated in the capacitor?


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jsm54321

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Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

(a) 96 W
(b) zero


strangeaffliction

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


jsm54321

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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