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Author Question: An ac signal at a certain frequency is applied across a 40-mH inductor and a 100- resistor. If the ... (Read 32 times)

melina_rosy

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on: Jul 29, 2018
An ac signal at a certain frequency is applied across a 40-mH inductor and a 100- resistor. If the power factor of this circuit is 0.40, what is the value of the frequency?
 
  A) 160 Hz
  B) 200 Hz
  C) 410 Hz
  D) 600 Hz
  E) 910 Hz

Question 2

A 4.20-g bullet embeds itself in a 20.0-kg block, which is attached to a horizontal spring with a force constant of 950 N/m. The maximum compression of the spring is 2.10 cm. What is the speed of the bullet just before it hits the block?
 
  A) 690 m/s
  B) 700 m/s
  C) 672 m/s
  D) 900 m/s
  E) 952 m/s


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cam1229

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

E

Answer to Question 2

A


melina_rosy

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Reply #2 on: Jul 29, 2018
Thanks


cam1229

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Reply #3 on: Jul 29, 2018
Welcome :)


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