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Dry air having a mass flowrate of 2 kg/s and a temperature of 300K merges with dry air flowing at 3 kg/s and having a temperature of 400K. What is the maximum temperature of the resulting mixture?
Determine the time t required for the disk to acquire its steady state angiular speed. the belt drive pulley rotates with a constant counterclockwise velocity w.
If the velocity v of the load is 2m/s down and the angular velocity w of the pulley is 8 rad/s counterclockwise at the time t =0, determine v and w after the cable tensions have been applied for 5 s
The pipe temperature increase to 220 degree F when in use. Determine the elongation of the pipe. The coefficient of thermal expansion for steel is .0000065 in./degree F.
Determine exit temp of oil and heat transfer rate between oil and water. Consider water and liquid as incompressible liquids and heat exchanger as very well insulated.
Determine total change in enthalpy of the gas (of amount 22kg + 10kg), by considering both the parts as one system. Consider Cp = 1.007kJ/(kg*K) for the gas.
A pulley with diameter D = 27in weighs 80 lb. It is mounted on a diameter d = 2-in axle. A weight of 1000 lb is to be lifted. If the coefficient of friction f = 0.1, what vertical pull force P will
Water at a flow of m = .215 kg/s is cooled from 82 degrees C to 42 degrees C by passing it though a thin-walled tube. What is the tube lenght if the coolant is water and V=7m/s.
When the pressure in the tank reaches 700 kPa, the entire refrigerant in the tank exists in the vapour phase only. At this point the valve is closed. Determine the final temperature in the tank.
Assuming the velocity is a parabolic function of v0 [1-(t/t0)2]. Determine the displacement x of the mass m for t less than or equal to t0. Assuming z= x - u.
Assuming that the bypassed air produces no thrust, and ignoring fuel mass, will the engine with bypassed air produce more thrust?
The vapour then expands adiabatically to a pressure 1.5 bar while doing 491.5 kJ/kg of work. Sketch the cycle on P-v coordinates Evaluate the heat and work for each process, in kJ Evaluate the therm
Determine The final temperature in the tank The mass of refrigerant that has entered the tank The heat transfer between the system and the surroundings.
Assuming that the bolt will be allowed to cool until 21 days into the outage, find the following the primary radioisotopes and activities of each in the bolt.
Determine the final velocity of each car, after all impacts, assuming (a) cars A and C hit car B at the same time, (b) car A hits car B before car C does.
Determine the net power developed by the plant, in kW, if the compressor and turbine operate without internal irreversibilities.
Superheated steam pressure at a 1 atm, mean temperature of 800K, and mass flow rate of 0.15kg/s enters a thin walled,metalic pipe of diameter D=0.2m. Determine the external flow convection coefficie
Find the derivative of the following function. Using backward difference and central difference methods, respectively, for 0<=x<=4 with step sixe 0.02.
It bums in a steam generator with 115 percent theoretical air. Calculate the minimum stack temperature if the fiue gases leaving the air preheater are at 15 psi?
Assuming that potential and jinetic energy contributions to the overall balance are negligble. Calculate the heat loss from the turbine in KW.
Superheated steam pressure at a 1 atm, mean temperature of 800K,and mass flow rate of 0.15kg/s enters a thin walled, metalic pipe of diameter D=0.2m. Determine the internal flow convection coefficie
Specify the capacity of an electric heater that will maintain an inside temperature of 21 degrees C. Power source limitation requires that the heater does not use more than 500 W.
Using the same power found in the part a above, what would be the maximum outdoor temperature during the summer for this system to operate and maintain the space at 298 K?
Consider an investment in a project having a first cost of $500,000, operating and maintenance costs of $35,000 per year. Assuming an interest rate of 6%, what is the present equivalent cost of the in
This power cycle produces Wcycle=1000 W. Determine the heat transfer rate onto this cycle, Qh and the heat transfare rate Qc out of this cycle, both in watts.