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4. A charge Q = + 50 nC is fixed in place at the origin. A Helium nucleus with charge q+2e is released from rest at point A on the x- axis, 1.00mm from Q. Later it gets to point B on the x-axis, 25.0 mm from Q. Q-+50.00nC 1.00mm 25mm ?4-1.00mm-01 a) What electric potential (in volts) does Q produce at point A? b) Moving from A to B, what change in P.E. is experienced by the Helium Atom? c) Determine the kinetic energy of the Helium atom when it gets to point B?

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