Author Question: Three equal charges of magnitude + 4.00 C are placed at the corners of an equilateral triangle of ... (Read 61 times)

armygirl · **on:** Jul 29, 2018

Three equal charges of magnitude + 4.00 C are placed at the corners of an equilateral triangle of side 2.00 cm. What is the electric potential energy of the system of these charges?

A)

90.0 J
B)

900 mJ
C)

0 J
D)

216 mJ
E)

21.6 J

Question 2

What is the critical angle for light traveling from crown glass (n = 1.52 ) into water (n = 1.33)?

A)

42
B)

48
C)

53
D)

57
E)

61