A 10-cm thick aluminum plate (rho = 2702 kg/m^3, cp = 903 J/kg·K, k = 237 W/m·K, and α = 97.1 × 10^–6 m^2/s) is being heated in liquid with temperature of 500°C. The aluminum plate has a uniform initial temperature of 25°C. If the convection heat transfer coefficient between the surface and the plate is 4740 W/m^2.K.

Required:
Determine the temperature at the center plane of the aluminum plate after 15 seconds of heating.

The mass flow rate of the fluid remains constant in all steady flow process. 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