1. The problem statement, all variables and given/known data The charged balloon expands as it is blown up, increasing in size. Here is a link. It is question 15. http://cf.linnbenton.edu/mathsci/physci/rajabza/upload/wkbk_solutions_27.pdf 2. Relevant equations 3. The attempt at a solution Is that answer correct? Because what I was thinking was since the balloon surface area was increasing then the density decreases hence all the points are decreasing? Am I wrong and the answer provided in the link correct?