**Practice Problem on Electric Field for Point Charges**
Q1=-7 micro-C
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P2 o-------------------o Q3=-8 micro-C
|------- 4cm -------|

2 charges are arranged on an equilateral triangle as shown above.
What is the electric field at P_{2}?
Give the x and y components, the magnitude, and the direction.
Specify the electric field to three significant places
and the angle to the nearest integer.
Use the convention that right is 0 degrees, up is 90 degrees,
left is 180 degrees, and down is 270 degrees.

ANSWER = ( E_{x} = 6.46e+7 N/C, E_{y} = 3.41e+7 N/C, |E| = 7.30e+7 N/C, angle = 28 degrees )