A nonconducting sphere contains positive charge distributed ...

[JGIBBSON]

A nonconducting sphere contains positive charge distributed uniformly throughout its volume. Which statements about the potential due to this sphere are true? All potentials are measured relative to infinity.
 
  (There may be more than one correct choice.) A) The potential is highest at the center of the sphere.
  B) The potential at the center of the sphere is zero.
  C) The potential at the center of the sphere is the same as the potential at the surface.
  D) The potential at the surface is higher than the potential at the center.
  E) The potential at the center is the same as the potential at infinity.

Question 2

A wooden block contains some nails so that its density is exactly equal to that of water. If it is placed in a tank of water and released from rest when it is completely submerged, it will
 
  A) rise to the surface.
  B) sink to the bottom.
  C) remain where it is released.

[Athena23]

Answer to Question 1

A

Answer to Question 2

C

[JGIBBSON]

TYSM

[xiazhe]

Gracias!