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A ceramic has K_0=.8 W/mK. If this ceramic is shaped into a cylinder with a porosity distribution. Evaluate the average porosity, and calculate the average thermal conductivity.
Plot the T-V diagram of the cycle process with saturation lines and also determine the ratio of the maximum to minimum pressures.
Assuming constant specific heats at 400 K, determine the total heat transferred from the gas. Take the atmospheric pressure to be 101 kPa. Height of cylinder is 54 cm.
Determine the average heat transfer coefficient, the convection heat transfer rate from the top of the plate, and the drag force on the plate for the following: (a) The fluid is water flowing at a v
Determine an expression for the ratio of the heat transfer coefficient averaged over the N plates to the heat transfer coefficient averaged over the single plate, hL,N / hL,1.
Determine a) the heat transfer into the cycle; b) the heat transfer from the cycle; c) the work for each of the processes; d) the cycle thermal efficiency.
Assuming that the heat pump requires 1.5 kW of power, what is the minimum temperature outside that can exist to allow the heat pump to work?
The coefficient of performance is found to be 5.0. Determine the amount of heat removed from and the temperature of the refrigerated space.
The cycle rejects heat to the environment at a temperature of 300 K. The engine produces 2 MW of power. Determine the minimum area needed to provide this power.
Assuming the outside temperature is 260 K, how much heat is lost through the walls per degree temperature difference?
The compressor requires an input of 5 kW of power and loses 0.24 kW of heat. Determine the coefficient of performance for this refrigerator.
What are the vertical forces exerted on the ends of the bow by the string? What is the horizontal component of the resultant force exerted on the archer's feet by the ground?
The valve is closed when no liquid is left in the tank and vapor starts to come out. Determine the total heat transfer for this process.
Determine the normal and shear stress in directions, respectively, normal and tangential to the weld. Solve this problem using Mohr's Circle.
A rigid, insulating tank that is initially evacuated is connected through a valve to a supply line that carriers helium at 200kPa and 120oC.
Neglecting KE and PE changes and assuming ideal gas behavior. Find whether the expansion is internally reversible, irreversible or impossible.
High - pressure air at 500 kPa and 30°C is to be used to drive a small turbine for a powering high speed drill. calculate the mass flow rate of air required to run the drill.
Knowing that the diameter of the shaft is 1.75in and that τ allowable=8ksi, determine the largest permissible magnitude of the force P2.
The remaining energy is dissipated by free convection into the surrounding quiescent atmospheric air at 25 ºC. Calculate the temperature of the outside surface of the wall.
Calculate the heat loss from the block's five surfaces by free convection to the surrounding quiescent air at atmospheric pressure and 25 ºC.
Determine the mass flow rate of condenser cooling water, in kg/s, if the cooling water undergoes a temperature increase of 18oC with negligible pressure change in passing through the condenser.
Water at 60 oF is flowing in a 6-in schedule 40 steel pipe that is 100 ft long. Calculate the maximum allowable volume flow rate if the energy loss due to pipe friction is to be limited to 180 ft-lb
Determine the maximum load the column can support if the load is centered in the cross-section. Use a factor of safety of 1 in this case.
Determine the functional realtionship between the maximum pressure, Pmax; generated by water hammer and the liquid density, ρ, intitial average velocity U, and the bulk modulus od the liquid, Ev
Five percent of this flow is diverted for the feedwater heating at 700 KPa. Determine the power produced by this turbine, in KW.