Air enters a radial blower with zero angular momentum. It leaves with an absolute tangential velocity, \(V_{\theta}\), of \(200 \mathrm{ft} / \mathrm{s}\). The rotor blade speed at rotor exit is \(170 \mathrm{ft} / \mathrm{s}\). If the stagnation pressure rise across the rotor is \(0.4 \mathrm{psi}\), calculate the loss of available energy across the rotor and the rotor efficiency.