Two waves travel simultaneously through the same medium. The ...

[nummyann]

Two waves travel simultaneously through the same medium.
 
  The first wave is described by y1(x,t) = Acos(kx-t) and the second wave by y2(x,t) = A cos(kx-t + ). If the amplitude of the resulting superposition is A/2, what are the possible values of ?
  A)
 
  /6, -/6
 
  B)
 
  /3, -/3
 
  C)
 
  /8, -/8
 
  D)
 
  60, -60
 
  E)
 
  /4, -/4

Question 2

In an LC circuit with an inductance of 40 mH and capacitance of 1.2 mF, the maximum charge on the capacitor is 45 mC during the oscillations which occur. What is the maximum current through the inductor during the oscillations?
 
  A)
 
  3.7 A
  B)
 
  42 A
  C)
 
  10 A
  D)
 
  6.5 A
  E)
 
  2.5 A

[Loise Hard]

Answer to Question 1

B

Answer to Question 2

D

[nummyann]

Excellent

[amandalm]

Gracias!