The session on April 6 was one hour,
during which the exam solutions for 
Exam 3, Spring 2016, were explained.
Attending:
 Keegan
 Aisha
 Tristan
 Clay

Some extra discussion of resonance:

 omega=sqrt(LC) applies to a circuit equation in charge form

   LQ'' + RQ' + (1/C)Q = E[0] sin(omega t)

 omega=sqrt(k/m - (1/2)(c/m)^2 ) applies to a mechanical equation in the form

   mx'' + cx' + kx = F[0] cos(omega t)

Please note that one has sine and the other cosine. The current equation is
obtained by differentiation of the charge equation, and contains omega*cos(omega t)
instead of cosine:

  LI'' + RI' + (1/C)I = E[0] omega cos(omega t)