SOLUTION: Chi Ming is dusting the house and raises a cloud of dust particles as he wipes across a table. If two 4.0x10^-14 C pieces of dust exert an electrostatic force of 2.0x10^-12 N on ea

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Question 1013508: Chi Ming is dusting the house and raises a cloud of dust particles as he wipes across a table. If two 4.0x10^-14 C pieces of dust exert an electrostatic force of 2.0x10^-12 N on eachother, how far apart are the dust particles at that time?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Coulomb's law states that
F+=+kq%5B1%5Dq%5B2%5D%2Fd%5E2
We are solving for the distance d in this case...so
2.0 x 10^-12 N = (8.99 x 10^9)(4.0 x 10^-14 C)^2 / d^2
gives us
d = .00268 m = 2.68 mm