You have removed a very large, thick plate of steel (aisi 1010) from your heat treat oven and have placed it on a large insulated surface; the steel is now at a uniform initial temperature of 600.0°c. you now cool the exposed top surface of the steel using high-velocity cooling fluid; which keeps the cooled surface at a constant 30.0°c (assume the other surface is not losing any heat). how long will you need to run the coolant to cool the steel at a depth of 4.20cm to a temperature of 60.0°c?

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