A standard marine torpedo is \(0.533 \mathrm{~m}\) in diameter and about \(7.2 \mathrm{~m}\) long. Make an engineering estimate of the power required to drive this torpedo at \(80 \mathrm{~km} / \mathrm{h}\) through freshwater at \(20^{\circ} \mathrm{C}\). Assume hemispherical nose, cylindrical body, and flat tail. \(C_{D}\) for a solid hemisphere (flat side downstream) is about 0.42 .