initial commit / add all books

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+clc;
+clear;
+mprintf('MACHINE DESIGN \n Timothy H. Wentzell, P.E. \n EXAMPLE-6.3 Page No.122\n');
+
+Alpha=6.5*10^-6;       //[in/(in*F)] Thermal expansion coefficient (Appendix 8)
+L=5;                   //[in] Length of engagement
+
+Delta=0.01204;       //[Degree] Elongation
+
+DT=Delta/(Alpha*L);    //[F] The temperature we would need to heat this bolt above the sevice temperature
+
+mprintf('\n The temperature we would need to heat this bolt above the sevice temperature is %f F.',DT);