Two Initially Uncharged Identical Metal Spheres Are Connected by an Insulating

Two initially uncharged identical metal spheres are connected by an insulating spring (unstretched length 0.75 m) .Charge +2q is placed on the first sphere and -q on the second sphere,causing the spring to contract to a length of 0.54 m.Recall that the force exerted by a spring is k $\Delta$ x,where $\Delta$ x is the change in the spring's length from its unstretched/uncompressed length and k is the spring constant.If the charge q = 2.06 * 10^-5 C,what is the spring constant?

A) 125 N/m
B) 187 N/m
C) 35.0 N/m
D) 58.3 N/m
E) 142 N/m

Correct Answer:

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