A spherical, non-conducting shell of inner radius r1= 10 cm and ...

[saliriagwu]

A spherical, non-conducting shell of inner radius r1= 10 cm and outer radius r2= 15 cm carries a total charge Q = 15 C distributed uniformly throughout its volume.
 
  What is the electric field at a distance r= 12 cm from the center of the shell? A)
 
  5.75  103 N/C
  B)
 
  0
  C)
 
  2.87  106 N/C
  D)
 
  5.75  106 N/C
  E)
 
  2.87  103 N/C

Question 2

A rock is dropped from a vertical cliff. The rock takes 7.00 s to reach the ground below the cliff. What is the height of the cliff?
 
  A)
 
  80.1 m
 
  B)
 
  240 m
 
  C)
 
  100 m
 
  D)
 
  26.2 m
 
  E)
 
  481 m

[prumorgan]

Answer to Question 1

C

Answer to Question 2

B