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A thermopane window consists of two pieces of glass (k = 0.78 W/m/K) 7 mm thick that enclose an air space (k = 0.026 W/m/K 7 mm thick. The window separates room air at 20?C from the outside air at -10?C. The convection coefficient associated with the inner (room-side) surface is 10 W/m2?K, while that associated with the outer (ambient air) side is 80 W/m2?K. Assume that the air enclosed between the panes is stagnant and that radiation may be neglected.What is the heat transfer through a window which is 0.8 m long by 0.5 m wide?
Use a suitable method to predict the racS,T variation along these plates when a= e= 0.1, 0.5, and 0.8 and emissions and reflections are diffuse.
A Pitot tube measures the total pressure on an airplane flying at sea level as 1.07 x 10^5 N/m^2. What is the velocity of the airplane?
A piston-cylinder device is insulated and contains 0.005 m3 of saturated liquid water at a constant pressure of l50 kPa. An electric resistance heater inside the cylinder is now turned on, and 1800 kJ of energy is transferred to the steam.
The humidity of air can be determined by use of two different thermometers; a 'dry bulb' thermometer and a 'wet bulb' thermometer. explain how these thermometers can be used to estimate the amount of water vapour in the air.
find the best fit Gaussian Curve through the data and plot the data and curve on the same graph.
the manometer shown above in problem 1 above contains water and kerosene. with both tubes open to the atmosphere, the free surface elevations differ by H=20mm determine the elevation difference when a pressure of 98.0 Pa is applied to the right.
Calculate the deflection of the simply supported beam at the center. The material is A36 steel and calculate the deflection of the simply supported beam at the center. The material is A36 steel and the beam is ten feet long.
Aluminum-lithium alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. A commercial aircraft skin material having a density of 2.47 g/cm3 is desired. Compute the concentration of Li (..
Now suppose the mean time to failure (mf) on the expose machine is 60 hours and the repair time is exponentially distributed with a mean of 2 hours (mr). What are the effective mean and CV of the process time for a job of 60 panels?
How many times more ignition energy is required to achieve ignition of a fuel-air mixture at sea level with T = 298 K than at altitude of 6000 m where pressure P = 47,166 Pa and T = 248 K?
If we have |N|(en) + F - W = 0 Where The unit vector of N is give, F components unknown and W is only -3400 j. What is the first step to solve for an unknown.
Determine the rate of heat transfer to the mid-stage cold head and determine the rate of heat transfer to the cold head
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