19. (a) The electric potential Vat the surface of the drop, the charge qon the drop, and the radius Rof the drop are related by V = q/4πε0R. Thus RqV==×⋅×=×−−4899 1030 1050054 1009124πε./.Nm CCVm.22chch(b) After the drops combine the total volume is twice the volume of an original drop, so
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This note was uploaded on 10/28/2010 for the course PHY 287 taught by Professor Aq during the Fall '10 term at Cogswell Poly.