Three charges QA = -2.0 C, QB= 6.0 C, and QC= -4.0 C are located ...

[asan beg]

Three charges QA = -2.0 C, QB= 6.0 C, and QC= -4.0 C are located along the y-axis at yA= -4.0 cm, yB = 0, and yC = 2.0 cm respectively. Calculate the electric potential at the point x = 6.0 cm on the x-axis.
 
  A)
 
  0.81  105 V
  B)
 
  -0.81  105 V
  C)
 
  0.41  105 V
  D)
 
  0
  E)
 
  -0.41  105 V

Question 2

Light enters an equilateral triangle prism in a direction parallel to one side. The prism is made of glass with an index of refraction of 1.52. What is the angle between the incoming ray and the ray that leaves the prism on the other side?
 
  A)
 
  83
  B)
 
  19
  C)
 
  59
  D)
 
  27
  E)
 
  55

[Anton]

Answer to Question 1

A

Answer to Question 2

C

[asan beg]

Excellent

[Kedrick2014]

Gracias!