A series RLC circuit has a 100- resistor, 2.0-mH inductor and a ...

[jjjetplane]

A series RLC circuit has a 100- resistor, 2.0-mH inductor and a 4.0-F capacitor connected across a 120-V rms ac source at 1000/ Hz. What is the power factor of this circuit?
 
  A) 0.54 B) 0.94 C) 0.64 D) 0.84 E) 0.74

Question 2

An 80-kg man is skating northward and happens to suddenly collide with a 20-kg boy who is ice skating toward the east.
 
  Immediately after the collision, the man and boy are seen to be moving together at 2.5 m/s in a direction 60 north of east. How fast was the boy moving just before the collision?

[cpetit11]

Answer to Question 1

C

Answer to Question 2

6.3 m/s