In a gas turbine, air (kinematic viscosity of 1x104-5 m 2/s) flows over a 2 cm long turbine blade at 100 m/s. how long should the blade be in my lab's wind tunnel (air, kinematic viscosity of 1.5x10a-5 ma2/s, velocity of 10 m/s), to match the reynolds number of the gas turbine? a)-2cm b)-30cm c)-0.3cm

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.