I originally thought that this problem was simple, and it still seems like it is, but there are conflicting solutions and I don't know which is correct. So I first solved for R1 and R2 using V=kQ/r where R1 is 0.514 and R2 is 0.54. My original thought was volume is conserved so V1 + V2 = V3 and...
calculus based intro physics is really just algebra based with some derivatives and simple integrals in my experience, the calculus doesn't really get engrained into the physics until the upper div classes
I would assume it is because T1 is the total tension in rope pq, and therefore even though 2T1 =883, and T1 is pulling on both sides of the pully, it is still the same tension force in the entirety of the rope ( I could be wrong about this and if someone wishes to prove me wrong please do so)