Using Maxwell's equations it can be shown that electromagnetic ...

[tingc95]

Using Maxwell's equations it can be shown that electromagnetic waves have a speed in free space of
 
  A)
 
  (OO)-3/2.
  B)
 
  (OO)-1/2.
  C)
 
  OO.
  D)
 
  (OO)-2.
  E)
 
  (OO)-1.

Question 2

Doubling only the spring constant of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?
 
  A)
 
  increases the energy by a factor of square root of two
  B)
 
  increases the energy by a factor of two
  C)
 
  increases the energy by a factor of three
  D)
 
  increases he energy by a factor of four
  E)
 
  produces no change

[tuwy]

Answer to Question 1

B

Answer to Question 2

B

[tingc95]

Thank you!

[tuwy]

Always glad to help...