A particle with charge -40.0 nC is on the x axis at the point ...

[awywial]

A particle with charge -40.0 nC is on the x axis at the point with coordinate x = 0. A second particle, with charge -20.0 nC, is on the x axis at x = 0.500 m. Is there a point at a finite distance where the electric potential is zero?
  1.Yes; it is to the left of x = 0.
  2.Yes; it is between x = 0 and x = 0.500 m.
  3.Yes; it is to the right of x = 0.500 m.
  4.No.

Question 2

What type of mirror is needed to form real images?

[komodo7]

Answer to Question 1

4

Answer to Question 2

Real images can be formed by a converging mirror.

[awywial]

Great answer, keep it coming

[ryansturges]

Gracias!