1. The problem statement, all variables and given/known data Water flows in a pipe with speed 1.5 m/s at point 1. The diameter of the pipe at point 1 is 4cm and the diameter at point 2 is 3cm. density of water: 998.2071 kg/m^3 What's the speed of the water at point 2? 2. Relevant equations I think you need to use this. I just have no idea how to find pressures p_1 and p_2 which seems to be needed to get the solution v2 out of this: p_1+0.5ρ(v_1)^2 = p_2+0.5ρ(v_2)^2 3. The attempt at a solution Trying to find the pressure difference p_2 - p_1 At this point I realize it's impossible because you need to use the equation above and it's also needed to solve v_2. No idea what else I could do.