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Determine the net work of the cycle, in kJ, and the heat transfer for process 2-3, in kJ, Is is this a power cycle or a refrigeration cycle? Explain.
A jet engine propels an aircraft at 300 m/s through air at 60 kPa and 0 C. The inlet diameter of this engine is 2 m, the compressor pressure ratio is 10, and the temperature at the turbine inlet is
An ideal Brayton cycle with regeneration has a pressure ratio of 10. Air enters the compressor at 300K and the turbine at 1200K. If the effectiveness of the regenerator is 100 percent, determine the
Determine the final temperature and the change in volume for the process. Sketch the process on a p-v diagram. Neglect changes in kineticand potential energy.
Air enters the compressor of a regenerative gas-turbine engine at 300K and 100 kPa, where it is compressed to 800 kPa and 580K. The regenerator has an effectiveness of 72 percent, and the air enters
Assuming that the disk rolls without slip and the force P = 18 N in the positive x-direction. Determine the acceleration of the mass center of the disk.
A group of students launches a model rocket in the vertical direction. Based on tracking data, they determine that the altitude of the rocket was 89.6 ft at the end of the powered portion of the fli
Estimate the time and distance required to decelerate the aircraft to 100 knots, assuming that the brakes are not used and the drag of the aircraft is negligible.
A pressure cooker cooks much faster than an ordinary pan by maintaining a higher pressure and temperature inside. The lid of a pressure cooker is well sealed, and steam can escape only through an op
Air undergoes an isentropic process from a pressure of 3 bar, 20°C to a pressure of 1 bar. Compute the final temperature and change in internal energy assuming Constant specific heat.
Draw a Block Diagram for a closed-loop room temperature control system consisting of a space heater with a single control knob (0-100%) and a temperature sensor.
Providing domestic hot water to a household typically requires 107 kJ of energy per year. Determine the minimum annual operating cost of a heat pump-powered water heater
If the temperature of the environment were 33o C, what rate of perspiration would be needed to maintain a comfortable skin temperature of 33o C?
Refrigerant 134a enters an adiabatic compressor as saturated vapor at 120 kPa at a rate of 0.3 m3/min and exits at 1 MPa pressure. Determine the temperature of the refrigerant at the exit of the comp
A ship travels 40km. on course of 17 degree south of east and then travels 90km. on course 50degree west of south. find the displacement from its starting point to its ending point.
A frictionless piston-cylinder device contains 2 kg of nitrogen at 100 kPa and 300K. Draw a sketch of the set-up and clearly identify the system to be analyzed.
During the process the temperature of the water changes from 10°C to 15°C. Compute the change in specific internal energy, specific enthalpy, and specific entropy.
Determine the component of vector A in the direction of vector B. Verify that the computed unit vector has a magnitude of one. A= 2i+3j-2k B= i+2j+2k
Find the hydraulic pressure during the extended stroke. The piston velocity during the extended stroke. The cylinder horsepower during the extended stroke.
An automatic automotive transmission casing has a shape of a rectangular box with side dimensions: 40 cm x 30 cm x 50 cm. During a long drive, the transmission receives a mechanical power input from
A commuter train travels along a straight path from the Lincoln Street stop to the San Francisco Street stop in six minutes. Determine the maximum speed of the train.
Fuel economy is not the best indicator of fuel consumed. Fuel consumption, the reciprocal of fuel economy, is a more direct measure of fuel consumed.
A football player releases a ball with an initial velocity 80 ft/s at an angle 35 degrees above the horizontal. Determine the radius of curvature of the trajectory and the time rate of change of the
A gas that is contained in a cylinder undergoes two processes that are in series. the first process, from 1 to 2, consist of a constant-pressure compression at 50 psia, and the volume goes from 0.5
A closed system of mass 5.3 lb. undergoes a process in which there is a heat transfer of 215 ft-lbf from the system to the surroundings. There is no work during the process.