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A thin metal cylinder contains an ideal gas. The cylinder has a cross sectional area of 100 cm^2. The surroundings outside the cylinder are maintained at 25 degrees C and 101 kPa.
Assume adiabatic operation, what is the ratio of chilled air to warm air that the device produces? Assume that air is an ideal gas for which Cp= (7/2)R.
A particle m weighing 0.6 lb has slid down a curved track and is currently at the bottom, moving to the right with a velocity of vm = 2et ft/s. The radius of curvature at this position is 8 feet, an
A 50 kg copper block initially at 350 degree C is quenched in a closed, rigid insulated tank containing 120 L of liquid water at 25 degree C.
Water is pumped to 25 bar and 50 degrees C (State 4) in an adiabatic pump. (a) Calculate thermal efficiency (%) of the cycle.
A cyclist is moving along a straight path at a speed of 18 mph. µs = µd = 0.43. Determine the minimum distance h required for her to come to a complete stop, assuming both tires brake a
A 4000 lbf conventionsl vehicle gets 19 MPG. A 4000 lbf hybrid gets 31 MPG. All other things being equal (maintenance, insurance, other costs), using this analysis how much more would you save using
The pressure in the pipe is 100 kPa. Heat transfer from the steam as it flows up the pipe is 100 kJ/kg. What is the quality of the water at the top of the building?
What is the initial volumetric flow rate of water out of the hose, in gpm (gallons per minute)? You can assume that the inside diameter of the hose is 5/8 inch.
With a constant velocity of 120 m/s due to a horrizontal force P applied to the block. Calculate how far down the incline the block will go once the force is removed.
A steel bar 2-meters long and having a square cross-section 2-cm on an edge is pulled in tension with a load of 100,000 N. How much elastic elongation will this bar experience?
How much heat in kJ must be added to 2 kg of steam initially at T1= 300 degree C, contained within a rigid volume to increase the pressure from 0.2 MPa to 0.4 MPa? The final temperature is 600 degr
Determine whether point 1 is a compressed liquid, a superheated vapor, or a mixture. Be specific on how you found your result
For a specific design, the desired radial load was converted to the equivalent C10 load of 14.2 kN. If sufficient clean lubricant is used, what will be the major failure mode in rolling bearings?
What is the required time at 675 degrees celsious to have only 25% Austenite left during the transformation from Austenite to Pearlite?
The steam enters at 320 C, 300 kPa, and the mixture leaves the chamber at 90 C, 300 kPa. Determine exit velocity in m/s if the exit area is 25 cm.
Find an expression for a change in enthalpy during a process 1 to 2. show that for a reversible adiabatic process and for c_v constant during the process, T(v-b)^(R/cv)= Constant.
The water is heated to 300 degrees C. Find the final pressure, volume, work from 1 to 2, and heat transfer from 1 to 2.
Determine all of the reactions and deflection at mid-span (point B) by using singulairity functions. Take EI=575 MNm2 . Your answer must include a sketch of the beam.
What is the thermal efficiency possible for a power cycle operating for heat transfer from hot reservoir of 627 kJ and heat transfer to the cold reservoir of 73 kJ?
Argon contained in a closed, rigid tank, initially at a temperature of 50C, pressure of 2 bar, and a volume of 2m^3, is heated to a final pressure of 8 bar.
A refrigerator cycle has a COP of 3 and removes 100kW of heat from a building, which is kept at 23C. The device rejects heat to an energy reservoir at 33C. What is the net entropy change in this pro
An industrial machine is being cooled by 0.4 kg/s water at 15 degrees C that is chilled from 35 degrees C by a refiregration unit with a Coefficiency Of Performance of 3.