Liquid water flows in thin walled copper tube with inside diameter d=15.2 cm. the mean inlet temperature of water is 82.2°c and it s velocity 7.2m/s. the outside convection coefficient is 14.1 w/m²k, and the temperature is 15.6 °c. for this system: (a) determine the heat transfer coefficient at the inner surface of the tube, and (b) find the length of the tube in which the water temperature drops by 5/9°c state and justify any assumptions you may make.

The higher the astm grain size number, the finer the gran is. a)-true b)-false

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

Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery