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A uniform solid sphere of radius r = 0.480 m and mass m = 17.0 kg turns counterclockwise about a vertical axis through its center (when viewed from above).
The displacement vectors 46.0 cm at 15.0° and 23.0 cm at 56.0° both start from the origin and form two sides of a parallelogram. Find the area of the parallelogram.
Develop a schedule for gasoline consumption and maximum cycle temperatures versus power production for an otto cycle with compression ratio of 8.
Design a closed-system air-standard gas power cycle composed of three processes and having a minimum thermal efficiency of 20 percent.
Determine the time at which the velocity is equal to zero. Hint: Plot the displacement, velocity as function in time for the first 15 seconds of motion. a = 2t -15.
If the work output is 1000 kj/kg, calculate the maximum possible thermal efficiency and compare with carnot cycle. Also, calculate the MEP. Assume constant specific heats.
The cycle work is 1000 kj/kg. What is the compression ratio of the engine if the maximum cycle temperature is 3173 K and the temperature at the end of isentropic compression is 773 k.
An air standard otto cycle has the following cycle states, where state A is the beginning of the isentropic compression; P1= 101 kpa, T1=333K, V1=0.28 cubic meter, T3=2000K, r=5.
The pressure and temperature at the end of compression stroke are 800 kpa and 700 degree C. Determine the network if the pressure at the end of heat addition is 3 Mpa.
Find the ideal thermal efficiency of the engine on the air-standard basis, if the exponent of the expansion and compression line is 1.35.
An ideal otto cycle has a compression ratio of 8:1. At the beginning of the compression process, air is at 95 kPa and 27 degree C, and 750 kj/kg of heat is transferred to air during the constant-vol
How much of this insulation must be added to reduce the heat transfer by 75 percent from that which would be experienced by the bare wire?
What is the speed of the rocket relative to the Earth once the rocket's mass is reduced to half its mass before ignition? What is the thrust on the rocket if it burns fuel at the rate of 56.5 kg/s?
A machine gun fires 174 g bullets at a speed of 610 m/s at a rate of 502 bullets/min. What steady force must be applied to the gun to hold it stationary?
What if the 820 kg car actually moves backwards with a speed of 1.9 m/s right after the collision instead of having a perfectly inelastic collision.
A 45.6-kg girl is standing on a 141-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat surface. What is the velocity of the plank relative to the ice surface?
Treat nitrogen as an ideal gas & determine the nitrogen's filial temperature, in degree C. Begin your analysis with the first law of thermodynamics. Find the final pressure, in kPa.
Show the process on T-v and P-v phase diagrams. Label the states and key pressure and temperature. Evaluate the work, in kJ. Evaluate the heat transfer, in kJ.
A well insulated, thin-walled, double-pipe, counter-flow heat exchanger is to be used to cool oil [Cp = 2.20 kJ/(kg C)] from 150 C to 40 C at a rate of 2 kg/s by water.
A well insulated, thin-walled, double-pipe, counter-flow heat exchanger is to be used to cool oil. Determine the rate of heat transfer in the heat exchanger and the exit temperature of water.
Determine (a) the electric power required (kW) to drive the pump if friction losses are neglected; and (b) the average velocity (m/s) of the water if a 20 cm diameter (ID) pipe is used.
Determine (a) the heat transfer from the compressor an (b) the volume flow rate of the refrigerant at the compressor inlet. Ignore changes in kinetic and potential energy for your calculation.
If the temperature and pressure of the steam at the nozzle exit at 400 degrees celcius and 2 MPa, the exit area of the nozzle is?
Account for variation of specific heats with temperature and model the engine as a dual cycle. Determine the amount of heat supplied per cylinder.
On an overflow structure of 50 degrees slope the water depth (measured normal to the surface of the structure) is 1.2 m (4 ft) and the streamlines are essentially straight and parallel.