Homework Help: Physics

Posted by Susie on Wednesday, February 24, 2010 at 8:14pm.

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 - bobpursley, Wednesday, February 24, 2010 at 8:20pm
V*q=work
q= 2*1.6E-19 coulombs
Physics - confused, Friday, February 26, 2010 at 4:38pm
doesnt vq = - work ?...signs are important

since work = -u, and u = vq

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