A plain concrete column 14 in. x 14 in. x 10 ft high is subjected to an average stress of 1,000 psi. Compute column shortening in 5 years if the load is applied 2 weeks (14 days) after the concrete is cast. The concrete is 3,500 psi NWC (145 lb/ft3 ), made from Type I cement, and was moist-cured for 5 days. The average relative humidity is 50 percent. Use the ACI 209R method. Assume top and bottom of column are not exposed to the atmosphere.

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