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A proton is released 2*10^-11 from the center of an immovable 6.4*10^-18 C charged sphere. What is the speed of this proton when it is 0.50mm from the center of the sphere?

  • physics -

    Kinetic energy = (1/2) m v^2

    Change of potential energy = kinetic energy.

    Do the other problem the same way.

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