Calculate the ram pressure for a round copper bar with an original cross-sectional area of 12.56 mm2 to a 45% reduction of area, given that the included die angle is 25° with a coefficient of friction (u) of 0.07 and the yield stress for copper is 350 mpa.

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg.k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m.k