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An unknown potential difference exists between the inner and outer surfaces of the membrane of a cell. The inner surface is negative relative to the outer surface. If 2.5 x 10-20 J of work is needed to eject a positive Calcium ion (Ca2+) from the interior of the cell, what is the value of the potential difference?

  • Physics - ,

    q= 2*1.6E-19 coulombs

  • Physics - ,

    doesnt vq = - work ?...signs are important

    since work = -u, and u = vq

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