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Homework Statement
Two electrons are 10-9m Apart when they are released.What is their speed when they are 10-8m apart?
Homework Equations
Ek=-EE
EE=Kq1q2
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r
The Attempt at a Solution
Ive tried 1/2mv^=-(Ke(squared) - Ke(squared)
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r2 r1
And i don't seem to get the answer
By the way the answer to the question is 4.78x10^5 m/s
thanks for the help