A pin fin of uniform, cross-sectional area is fabricated of an aluminum alloy ( 160 W/m·K). The fin diameter is 7 mm, and the fin is exposed to convective conditions characterized by 220 W/m2·K. It is reported that the fin efficiency is 0.65. Determine (a) the fin length and the fin effectiveness . Account for tip convection.

A200-n force is applied to the foot-operated air pump. the return spring s exerts a 2.6-n·m moment on member oba for this position. determine the corresponding compression force c in the cylinder bd. if the diameter of the piston in the cylinder is 40 mm, estimate the air pressure generated for these conditions. state any assumptions. enter a positive number for the compression force c.