1. The problem statement, all variables and given/known data This was a thermodynamics question; A fluid is being moved by a pump though a 1inch diameter tube. The density is 100 lb/ft3 with a flow of 12 lb/s. The pressure rises 40lbf/in. Assume there is no heat transfer. Find hp of the pump to the nearest 1/4hp. 2. Relevant equations I assumed that the first law of thermodynamics was needed: 0=Qcv-wcv+m[(h1-h2)+(V12-V22)+g(z1-z2)] 3. The attempt at a solution I assumed Q=0 but was rather confused on how to even start this equation. I believe you would need to use density relations to find the specific volume and enthalpy in order to apply the 1st law of thermodynamics? Would this be better suited to be solved in terms of fluid dynamics?