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Author Question: A 475-gram ball is traveling horizontally at 12.0 m/s to the left when it is suddenly struck ... (Read 125 times)

NguyenJ

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on: Jul 29, 2018
A 475-gram ball is traveling horizontally at 12.0 m/s to the left when it is suddenly struck horizontally by a bat, causing it to reverse direction and initially travel at 8.50 m/s to the right.
 
  If the bat produced an average force of 1275 N on the ball, for how long (in milliseconds) was it in contact with the ball?

Question 2

A 120-V rms voltage at 60 Hz is applied across an RC circuit. The rms value of the current in the circuit is 0.60 A, and it leads the voltage by 60. What is the resistance in this circuit?
 
  A) 100  B) 60  C) 150  D) 200  E) 120


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ciecieme

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

7.64 ms

Answer to Question 2

A


NguyenJ

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Reply #2 on: Jul 29, 2018
Thank you!


ciecieme

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Reply #3 on: Jul 29, 2018
Always glad to help...


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