Engineering, 30.08.2019 16:10 welcome00
Acomposite wall consists of 20 mm thick steel plate backed by insulation brick (k = 0.39 w/mk) of 50 cm thickness and overlaid by mineral wool of 20 cm thickness (k = 0.05 w/mk) and 70 cm layer of brick of (k = 0.39 w/mk). the inside is exposed to convection at 650°c with h = 65 w/ m2k. the outside is exposed to air at 35°c with a convection coefficient of 15 w/m2k. determine the heat loss per unit area, interface temperatures and temperature gradients in each materials.
Answers: 2
Engineering, 04.07.2019 18:10
What difference(s) did you notice using a pneumatic circuit over hydraulic circuit.explain why the pneumatic piston stumbles when it hits an obstacle.
Answers: 2
Engineering, 04.07.2019 18:10
The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false
Answers: 1
Engineering, 04.07.2019 18:10
Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way
Answers: 2
Engineering, 04.07.2019 18:20
A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.
Answers: 3
Acomposite wall consists of 20 mm thick steel plate backed by insulation brick (k = 0.39 w/mk) of 50...
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