A model hydrofoil is to be tested at 1:20 scale. The test speed is chosen to duplicate the Froude number corresponding to the 60-knot prototype speed. To model cavitation correctly, the cavitation number also must be duplicated. At what ambient pressure must the test be run? Water in the model test basin can be heated to \(130^{\circ} \mathrm{F}\), compared to \(45^{\circ} \mathrm{F}\) for the prototype.