Acopper block of volume 1 l is heat treated at 500 °c and now cooled by immersion in a 200 l light oil bath initially at 20 °c. assuming no heat transfer with the surroundings, determine the final equilibrium temperature of the copper-oil system assuming the specific heat capacities of both are constant.

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