Calculate pressure in steps of 1 cm in a die of square cross-section for double-action compaction of powders under an applied pressure of 50 MPa. Assume cross-section to be 10 mm x 10 mm and the total length of the compact to be 5 cm. The radial-to-axial pressure ratio is 0.4, and the coefficient of friction is 0.2.

Afan that can provide air speeds up to 60 m/s is to be used in a low-speed wind tunnel with atmospheric air at 35 c. if one wishes to use the wind tunnel to study flat-plate boundary layer behavior up to reynolds numbes of re 10, what is the minimum plate length that should be used? at what distance from the leading edge would transition occur if the critical reynolds nurnber were rer, e = 5 × 105?