A 1-mCi point source of 137Cs is located at the center of a sphere of concrete. The sphere has a diameter of 10 cm. The source emits photons of energy 0.662 MeV with a frequency of 0.845 per decay. (a) What is the total interaction coefficient of the concrete at the source photon energy

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.