Consider a metal single crystal oriented such that the normal to the slip plane and the slip direction are at angles of $43\mathrm{.}1$ and $47\mathrm{.}9,$ respectively, with the tensile axis. If the critical resolved shear stress is $20\mathrm{.}7$ MPa $(3000$ psi $),$ will an applied stress of $45$ MPa $(6500$ psi $)$ cause the single crystal to yield? If not, what stress will be necessary? Answer: $22$ MPa