A certain ac signal at 1000 Hz is applied across an inductor and ...

[chads108]

A certain ac signal at 1000 Hz is applied across an inductor and a 100- resistor. If the power factor of the circuit is 0.400, what is the impedance of this circuit?
 
  A) 150
  B) 200
  C) 250
  D) 100
  E) 300

Question 2

What is the change of entropy of water (Lf = 0.333 MJ/kg, Lv = 2.26 MJ/kg) when 450. grams of water:
 
  (a) changes from liquid to steam?
  (b) changes from ice to liquid?

[Mholman93]

Answer to Question 1

C

Answer to Question 2

(a) 2.73 kJ/K
(b) 549. J/K

[chads108]

Thanks for the timely response, appreciate it

[bitingbit]

Wow, this really help