Carbon tetrachloride flows in a pipe of variable diameter with negligible viscous effects. At point \(A\) in the pipe the pressure and velocity are \(20 \mathrm{psi}\) and \(30 \mathrm{ft} / \mathrm{s}\), respectively. At location \(B\) the pressure and velocity are \(23 \mathrm{psi}\) and \(14 \mathrm{ft} / \mathrm{s}\). Which point is at the higher elevation and by how much?