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An air conditioning unit with refirigerant-134a as the working fluid is used to keep a room at 26 degrees celcius by rejecting the waste heat to the outdoor air at 34 degrees celcius.
The veolicty stays constant for 1km, the first 500 m are flat and the rest of the way is inclined by 5 degrees. Determine the work required to get to the gas station at the end of the 1km.
What will be the most probable crystal structure for this alloy? Determine the mass in grams of the atoms inside a unit cell of this alloy, Determine the lattice constant for this alloy.
Determine the value of the tubes angular velocity w if after release, the projectile exits the tube with a speed of 90 ft/s. Give answer to 4 sig figs.
A Brinell hardness measurement, using a 10-mm diameter indenter and 300 kg load, produced an indentation 1.5 mm in diameter.
Water enters a nozzle with a velocity of 0.8 m/s and exits with a velocity of 5 m/s. The nozzle entrance diameter is 12 mm. Estimate the inlet pressure if the outlet pressure is 100 kPa and the wate
A cylindrical specimen of aluminum having a diameter of 19 mm and length of 200 mm is deformed elastically in tension with a force of 48,800 N. Using the data contained in Table 6.1
For the compressor, the isentropic efficiency is 92% and for the turbine the isentropic efficiency is 95%. For a regenerator effectiveness of 85%, determine the rate of heat addition in the combusto
A first-order system is subjected to a harmonic input of 3Hz. The system has a time constant of 0.5s. Calculate the error of the amplitude response and the phase lag.
A natural gas engine has a BSFC of 9000 BTU's/hp-hour when producing 200 horsepower. How many BTU's per hour does the engine consume?
The yield stresses of several samples of a steel containing 0.12% carbon with different grain sizes were measured. Calculate the grain size of each steel sample in micrometers.
Steam enters an adiabatic turbine at 10 MPa and 500 0C and leaves at 10 kPa with quality of 90 %. Neglecting the changes in kinetic and potential energies, determine the mass flow rate required for
The bar rotates in the horizontal plane about a smooth pin at the origin. The 2 kg sleeve A slides on the smooth bar and the mass of the bar is negligible in comparison to the mass of the sleeve.
Using cv = constant theory, an using thermal properties at state 1, find (a) the temperature (R) and pressure (psia) at states 2, 3, 4 (b) the net work of the cycle (Btu) (c) the cycle thermal effi
Calculate the cylinder gas temperature at the end of the exhaust blowdown process. Calculate the net work done by one cylinder during one cycle.
A gymnast having a mass of 80 kg holds the two rings with his arms down in the position show as he swings downward. His center of mass is located at point G1. When he is at the lowest position of hi
A part subjected to a stress of 50 ksi may experience a single edge surface crack no longer than 0.015 in. Which (if any) of the following materials is a good candidate for the part?
An adiabatic chamber has 0.5 lbm of air at 550 Rankine. If further air flows in at 100 psia and 550 Rankine, and additional mass of this air is 0.2 lbm. What is the final Temperature?
The spring has a constant of 700 Ibf/in, and that you can train your horse to stand on your platform. How much does your horse weight? How much work is being done on the spring?
Will the shell rise or sink when the supports are removed if it contains air at 10degree C? What is the spherical shell acceleration right after the release?
The components are to be linked to one another with a uniqu linakge system that adds nothing to overall sphere-cylinder-float vertical dimension. What size float (length and diameter) is needed if t
Heat is now added to the air, determine the work done by the air and the total heat transferred when the volume doubles. Also show the process on a P-v diagram.
A carnot engine operating on air accepts 50 kj/kg of heat and rejects 20 kJ/kg. Calculate the high and low reservoir temperatures if the maximum specific volume is 10 m^3/kg and the pressure after t
Jet-type pumps are sometimes used for special purposes, such as to circulate the flow in basins in which fish are being reared. The use of a jet-type pump eliminates the need for mechanical machiner
Determine: (a) the total rate of change in exergy of the steam passing through the turbine, and (b) the exergetic efficiency of the turbine.