#include #define N 10 int main(){ float x[N]={1,2,3,4,... ,10}, y[N]={-3, 2.9, 0.5, , 2.4}; float xysum=0.0, xsum=0.0, ysum=0.0, x2sum=0.0; float a, b; int i; for (i=0; i< N; i++) { xsum = xsum + x[i]; ysum = ysum + y[i]; xysum = xysum + x[i]*y[i]; x2sum = x2sum + x[i]*x[i]; } a = ; b = ; printf("The regression line is %f x + %f.\n", a, b); return 0; }

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.

Select any two (2) areas of applications of chain-drive. (clo4) a)-permanent lubrication necessary b)-hydraulic forklift truck operation c)-rigging and heavy moving materials d)-relatively high maintenance costs e)-costlier than belt drives