For the following beam assume concrete of compressive strength of 4,000 psi and density of 150 lbs/ft3 and reinforcing steel bars with yield strength of 75 ksi to a. examine if it cracks under its self weight b. if not, estimate the maximum load P, the beam can carry without cracking. c. If yes, estimate the minimum counteracting load (support) that needs to be provided in the middle of the span so that the beam does not crack.

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