Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. Half-way between the two plates the electric field field has a magnitude E
If the separation of the plates is reduced to d/2 what is the magnitude of the electric field half-way between the plates? A)
4E
B)
E/2
C)
0
D)
2E
E)
E
E
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When water boils in Denver, Colorado (elevation 5,200 ft) is its temperature greater than, less than, or equal to the temperature of boiling water in Dallas, Texas (elevation 450 ft).
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Coulomb's Law: As shown in the figure, three charges are at the vertices of an equilateral triangle. The charge Q is 6.7 nC, and all the other quantities are accurate to two significant figures. What is the magnitude of the net electric force on the charge Q due to the other two charges? (k = 1/4??0 = 9.0 × 109 N ? m2/C2) 
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