1. The problem statement, all variables and given/known data I’m trying to integrate the surface of a cylinder. I know when integrating the surface of a cylinder the surface element is: ρdØdz Where ρ² + z² = r² And for a sphere it is: r²sinθdθdØ In a sphere r=ρ But in a cylinder when I’m integrating its surface, could it be written as: (r² - z² )½ . dθ.dz For example ∫∫zdS over a cylinder from 0<z<5 and 0<Ø<2π Would it be: ∫∫z. (r² - z² )½ . dθ.dz ?