Electric charge is uniformly distributed inside a nonconducting ...

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Electric charge is uniformly distributed inside a nonconducting sphere of radius 0.30 m. The electric field at a point P, which is 0.50 m from the center of the sphere, is 15,000 N/C and is directed radially outward.
 
  At what distance from the center of the sphere does the electric field have the same magnitude as it has at P?
  A) 0.11 m
  B) 0.13 m
  C) 0.17 m
  D) 0.15 m
  E) at no other point

Question 2

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

[meganlapinski]

Answer to Question 1

A

Answer to Question 2

A

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TYSM

[amcvicar]

Gracias!