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A vertical piston-cylinder device initially contains 0.25 m3 of air at 600 kPa and 300°C. Determine the final temperature in the cylinder, the boundary work during the process and the heat transfe
A long solenoid has a diameter of 12.0 cm. When a current i exists in its windings, a uniform magnetic field B = 27.0 mT is produced in its interior. By decreasing i, the field is caused to decrease
Water is circulating through a closed system of pipes in a two floor apartment. On the first floor, the water has a gauge pressure of 3.4X10^5 Pa and a speed of 2.1m/s. However, on the second floor,
The air passing through the valve has a speed of 300 m/s and a density of 6 kg/m^3. Determine the instantaneous rate of change of density in the tank at t+0.
It is known that the boundary thickness at the position 8 cm from the leading edge is 1.2 mm thick. What is the boundary layer thickness at the position of 2 cm from the leading edge?
Water vapor is cooled in a closed, rigid tank from 540 degrees Celsius and 100 bar to a final temperature of 270 degrees Celsius . Determine the final pressure, in bar, and sketch the process on T-
A standard deviation of 0.03 mm. If 250 shaft and hubs are tested, how many would you expect to exhibit 'satisfactory fit'. Assume hub and shaft are normally distributed. Clearance is Inner diamet
Calculate the temperature difference across the thickness of the 5-mm-thick aluminum plates. Comment on whether it is important to know the axial locations at which the temperatures of the aluminum
What is the flow rate of cell suspension from the membrane tubes? What is the flow rate from the annular space? Assume the cells are not active, i.e. they do not grow.
What is the minimum power required to drive the heat pump (kW)? b) For the same power as in part a), what is the maximum outside temperature (°C) for which the house can be maintained at 25°
The rotation of rod OA about O is defined by the relation ?= 0.5e^ -0.8t*sin3pt, where ? and t are expressed in radians and seconds, respectively.
In kidney dialysis, a person's blood is passed through a bath that contains several ions and molecules. The blood is separated from the dialysis fluid by a membrane that allows water, small ions, an
Determine the volume of the chamber and the final pressure of the air inside the chamber. Assume that the air is an ideal gas with constant specific heat cp= 1.004 kJ/(kg.K).
Derive an expression for the response of a reactor system that consists of two ideal CSTRs connected in series when an impulse stimulus is applied. Then use that expression to generate an expression
The deep submersible vehicle ALVIN has a hollow titanium (SG=4.50) spherical passenger compartment with an inside diameter of 78.08 in and a wall thickness of 1.93 in. (a) Would the empty sphere flo
R-134 enters the condenser of a window air conditioning unit at 800 kPa. What is the rate of heat rejection to the outside air via the condenser?
A pontoon of constant rectangular cross section is 50 m long, 10 m wide and 5 m in depth. It floats in sea water at a draught of 2 m with its C.G. 2.5 m above the base.
A mass of 10 tonnes is moved 20 m across the deck of an ocean vehicle of 10,000 tonnes displacement. The ocean vehicle has a rectangular tank 20 m long and 10 m wide containing sea water.
Determine the amount of heat transfer when this is done during a (i) constant volume process; (ii) a constant pressure process.
An oil pipeline was constructed to transport an oil with SG = 0.8 for a distance of 10 miles. The country was hilly, so the line made many ups and downs. These may be considered equivalent to 10 ris
What is the change of internal energy and enthalpy of 4 kg nitrogen as it changes from 50oC and 100kPa to 100oC and 200kPa?
A tank contains 2500 m3 of salt solution, with a salt concentration of 20 kg/m3. At time zero, salt free water starts to be pumped into the tank at a rate of 20 m3/min.
The crate slides down the section of the spiral ramp such that r = (0.5z) ft and z = (100 - 0.1t2) ft, where t is in seconds. If the rate of rotation about the z axis is ? = 0.04pt rad/s, determine
The air is now compressed in a polytropic process to 400kPa and 140oC. Determine the amount of heat transfer and identify if it is the heat loss or gain during this process.
A small high speed turbine operating on compressed air produces a power output of 100 W. The inlet state is 4 bar, 50 degrees Celsius, and the exit state is 1.5 bar, -30 degrees Celsius.