Acylindrical powder compact with an outer diameter do and inner diameter di is to be pressed by means of single-action compaction. derive an equation analogous to eq. 7.71 that would be appropriate for this geometry. hint: for this geometry, the normal force on the compact, fn, may be represented in terms of the applied pressure as follows: f= z x p x pi ( do + di ) dh

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