Two previously undeformed cylindrical specimens of an alloy are to be strain hardened by reducing their cross-sectional areas (while maintaining their circular cross sections). for one specimen, the initial and deformed radii are 17 mm and 10 mm, respectively. the second specimen, with an initial radius of 11 mm, must have the same deformed hardness as the first specimen; compute the second specimen's radius, in mm, after deformation. r = mm

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

Apure substance is a)-mixture of various chemical elements or compounds b)-substance that has a fixed chemical composition throughout c)-mixture that is homogeneous (such as air) d)-all the answers

Aspring-mass system consists of a mass weighing 20 kg and a spring with stiffness of 1000 n/m. the mass is subjected to resonance by a harmonic force f(t) 20 cos wt n. the initial condition is given as the initial position 0 and the initial velocity 0. find the amplitude of the forced motion at the end of (a) 1.5 cycle and (b) 2.25 cycles