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Determine the net work of the cycle in kJ and the heat transfer for process 2-3 in kJ. Is this a power cycle or a refrigeration cycle? Explain.
A 230 V shunt motor, having an armature resistance of 0.05 ohms. A while running light at 1120 rpm. Determine the motor efficiency when the line current at a given load is 46 A.
If the room air temperature needs to be maintained at a constant 21 C how many window air conditioning units are required.
For each set of temperature readings, calculate the sample mean, the range and the sample standard deviation.
Can this process occur adiabatically? if yes, determine the work per unit mass of air, in Btu/lb, for an adiabatic process between these states. If no, determine the direction of the heat transfer.
At a ceratin instant the temperature distribution in the cylinder is T(r)= a+br2, where a and b are constants. Obtain expressions for the heat transfer rate at ro and the fluid temperature.
What weight (lbs/gal) drilling mud would be required to balance the expected formation pressure at this depth?
The tank contains water to a depth of 5ft plus a depth of 2.5ft of oil on top of the water. The SG of the oil is .82. Determine the magnitude and location of the resultant force on one end of the ta
The depth on the right hand side is 20ft. The gate is 8 ft tall and hinged at the top. In order to keep the gate closed, determine the external moment that must be imposed at the hinge.
The weight of the disk is 20 lbs. A person dives down to remove the disk. How much verticle force must the diver exert to lift the disk from the drain?
What is engineering strain, modulus of elasticity. What is the yield strength at .2% (or .002) strain offset, and plot engineering stress-strain curve.
An aluminum alloy specimen of .562" diameter and 2"gauge length was subjected to loads. What is engineering stress?
What equal amount can you withdraw from the account at the end of each month for three years and leave $4000 in the account?
Calculate the specific weight in lbf/ft^3 on Earth and on the moon. Acceleration of gravity on the moon is 5.47 ft/s^2.
List all assumptions and show all calculations. Is this the force that is actually needed to lift the stopper? Explain.
4-lbm of water at 400 psia initially fills the 2.5-ft3 left chamber of a partitioned system. Determine the final pressure of water, in psia, and the total internal energy, in Btu, at the final state.
Streptomycin, an antibiotic, is produced on a large scale in theUnited States. Develop an equation to determine the ratio of streptomycin solution to total solution.
Determine the overall efficiency of the pump motor unit and the pressure difference between the inlet and the exit of the pump.
The initial volume is 0.1 m^3, the final volume is 0.04 m^3, and the final pressure is 2 bar. Determine the initial pressure, in bar, and the work for the process, in kJ, if a) n=0, b) n=1, c) n=1.3
Knowing that Es = 29 x 106 psi and Ec = 3.6 x 106 psi, determine the normal stresses in the steel and in the concrete when a 150 kip axial centric force P is applied to the post.
A force is applied to the top plate such that a shear stress tau = 26 PA is generated. How fast will the top plate move relative to the bottom plate after a constant velocity is attained?
Compare the efficiency and peak pressure of the cycle with the efficiency and peak pressure that would be obtained if all of the fuel were burnt at constant pressure or at constant volume.
A 3 cm thick stainless steel (thermal diffusivity 0.0000044, k=16.3) initially at 500°C. Calculate the time for the center temperature reaches 120°C.
Determine values of the specific volume of the saturated vapor and saturated liquid. Also, determine their ratios. (c) Determine h(fg) for these same conditions.
The input conditions are 10C and 379 kPa. What are the corresponding changes in internal energy and enthalpy per kilogram of water supplied?