Q $21\mathrm{.}33$ Consider a turning operation performed on steel whose hardness $=225HB$ at a speed $=3\mathrm{.}0\frac{m}{s},$ feed $=0\mathrm{.}25mm,$ and depth $=4\mathrm{.}0$ mm $.$ Using values of thermal properties found in the tables and definitions of Section $4\mathrm{.}1$ and the appropriate specific energy value from Table $21\mathrm{.}2,$ compute an estimate of cutting temperature using the Cook equation. Assume ambient temperature $=20C.$