The (solid) steel shaft (with G = 10.4 × 103 ksi) is made from two segments with different diameters: dAC = 0.5 in and dCB = 1 in. If the shaft is fixed at its ends A and B and subjected to a torque of 500 lb-ft at D, determine the maximum shear stress in the shaft.

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.

Water vapor initially at 10 bar and 400 °c is contained within a piston-cylinder assembly. the water lost heat to the surrounding according to isochoric (iso-volumetric) process until its temperature is 150 °c. the water is then condensed isothermally to saturated liquid. for the water as a system, calculate the work in kj/kg

What is a monomer? how do they form a ploymer from the view point of chemical bonding?