The direction of the electric field halfway between an electron ...

[washai]

The direction of the electric field halfway between an electron and a proton is
 
  A)
 
  undefined since the electric field is zero.
  B)
 
  directed toward the proton.
  C)
 
  directed toward the electron.
  D)
 
  perpendicular to the line from the electron to the proton.
  E)
 
  cannot be determined.

Question 2

Under what conditions do shock waves occur?
 
  A)
 
  The frequency of the waves is the resonant frequency of the system.
  B)
 
  The amplitude of waves exceeds the critical shock value.
  C)
 
  When two waves from different sources collide with each other.
  D)
 
  The wave source is traveling at a speed greater than the wave speed.
  E)
 
  The period of the waves matches the lifetime of the waves.

[sultana.d]

Answer to Question 1

C

Answer to Question 2

D

[washai]

Thank you!

[sultana.d]

Always glad to help...