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What is the mass transfer rate on both the top and bottom surfaces(kg/s). Are they equal and why? Estimate how long it will take for the oil to disperse from the surfaces given the initial oil layer i
Perform a complete analysis of the cycle to determine the properties at each state point, the heat transfer and work of each process, and the net work and thermal efficiency.
Analyze the cycle using air standard assumptions that account for variation in specific heats. Determine the mass flow rate of air required to produce 60 MW.
When the total water volume is 0.2m3, the pressure is 1MPa. Heat is now added to the water at a rate of 5kw until the total water volume is 0.2m3. What is the final temperature of the water?
You are to select a refrigerator for frozen food processing facility. The freezing of the food requires a heat rate of 250kw at a temperature of -20C. you will reject heat to the atmosphere whose te
Assume the mouth of the container is narrow enough that in effect w have a 1 inch stagnant gas. Will the alcohol content of the solution change significantly in 1 day (Diffusivity for this system i
Estimate the safety factor with respect to infinite fatigue life for (a) a torque fluctuating between 0 and 60 lb.ft, (b) a completely reversed torque of 30 lb.ft.
Determine the friction force F and the acceleration of the center of mass. Model the wheel as a thin circular disk.
Calculate the value of mass transfer coefficient and the flux for mass transfer from a sphere of naphthalene to air at 45C and 1 atm abs flowing at a velocity of 0.305 m/s.
Construct the radial hardness profiles to scale for the following a 50-mm (2-in) diameter cylindrical specimen of an 4340 steel alloy that has been quenched in moderately agitated oil.
A permanent magnet DC motor is coupled to a load through a gearbox. If the polar moments of inertia of the rotor and load. What is the max acceleration that the motor can produce in the load?
The coefficient of restitution is e=0.7 between the block and the sphere. Determine after impact:(a) the velocities of A and B, and (b) the distance x traveled by block B.
Determine the average force on the wall in lbs. The deceleration rate in ft/s2, and the time period of decceleration in seconds.
Knowing that the coefficient of friction is uk=0.3, determine how far the package will travel own the ramp in 5 seconds.
What are the mole and mass fraction of water at the air side of the interface? At the water side of the interface?
The cylinder and hub have a total mass of 30 kg and a radius of gyration of 0.5 m. Assume no slippage. Determine the acceleration of the mass center of the cylinder and hub when P= 90 N.
Calculate the speed it reaches if it starts from rest and accelerates uniformly for 40 seconds. Speed should be in RPM.
A single mixed stream exits at 1 bar. cp,i for air and helium is 1.005 and 5.193 kJ/kg.K, respectively. Determine for the control volume the temperature of the exiting mixture.
Determine the temperature at which condensation begins. [T=101C] Based on the calculations, is there any condensate formed during the process?
If the power output is 5 MW, determine: (a) the mass flow rate of the steam flowing through the turbine, (b) the thermodynamic efficiency of the turbine.
It is desired to redue this by a factor of 100 while maintaining the inside temperature at -30 degrees F. Find the appropriate insulation thickness in inches.
Condenser pressure is 0.1 bar. Assuming that the isentropic efficiency of the turbine is 0.92 and that of the pump is 0.95. Calculate the net work output per kg of steam.
What is the heat transfer rate of nitrogen through the compressor assuming the process is a) isentropic, b) polytropic with n=1.3, and c)isothermal.
Knowing that the allowable maximum shearing stress in shaft AE is 9000 psi determine the smallest permissible diameter of shaft AE. Where PG (hp) is 10, f (rpm) is 1000.
A crate in the back of a truck with an open tailgate has impending sliding as the truck accelerates from rest to 60 mph in 10 seconds on a horizontal surface.