1. The problem statement, all variables and given/known data The problem: the distribution of pressure of the left side of the circular cylinder 2. Relevant equations ρ= the density of water γ=ρg P=ρgh circle O = a long wooden circular cylinder 3. The attempt at a solution MY QUESTION: Please see the curve indicated by the green/purple circle in the above picture. Is the curve a spiral? And what spiral?