Relationship between voltage, resistance and current in a circuit

When an object moves in uniform circular motion, the direction of its acceleration is a) in the same direction as its velocity vector. b) in the opposite direction of its velocity vector c) is directed toward the center of its circular path. d) is directed away from the center of its circular path. e) depends on the speed of the object.

Which statement best explains why the overall charge on an atom is zero?

Mixing salt in water is an example of physical change