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Two kilograms of zinc at 500C and 1 atmosphere is contained in a thermally insulated jacket. The system is compressed reversibly to a pressure of 15,000 atmosheres. Calculate the temperature change
Compute the concentration of carbon at 0.2 mm from the carbon-free surface of the 1030 steel bar after 1 hour in vacuum at 1000 degrees Celsius. Take the initial carbon concentration of the 1030 ste
The Corundum crystal structure, found in the compound Al2O3, consists of an HCP arrangement of o^(-2) ions; the Al ^(3) ions occupy octahedral positions. What fraction of the available octahedral p
A satellite P is in a circular oribt of radius rho around a fixed mass O. How much energy is required to change to an elliptical orbit of eccentricity e and semimajor axis a?
A team of design students working on a mousetrap-powered vehicle decides to use computercompact discs as wheels. The discs are lightweight and readily available.
The inlet to a nitrogen compressor is a pipe of 5cm internal diameter; its outlet is a pipe of 2 cm internal diameter. At steady state, the temperature at the inlet is T(in) = 300k.
Warm air is contained in a piston-cylinder assembly oriented horizontal as shown in figure P.142. The air cools slowly form an initially volume of 0.003 M^3 to a final volume of o.oo2 m^3.
A round copper rod sticks through the insulated wall of a tank of hot water and into the air inside the room. The diameter of the rod is 12mm and the copper rod extends 100 mm off either side of the
A propeller drive shaft is to transmit 2500 hp at 75 rpm. It is to be made of AISI 1040 WQT 1300 steel. Use a design factor of 6 based on the yield strength in shear. The shaft is to be hollow, with
A vertical piston cylinder assembly with a piston of mass 25 kg and having a face area of 0.005 m^2 contains air. The mass of air is 2.5 g, and initially the air occupies of a volume of 2.5 liters.
Determine the rate at which energy is removed by heat transfer from the refrigerated space, in kW, and the refrigerators coefficient of performance.
Determine the following. Assume that the tunnel operates adiabatically. The total mass of the gas, in kg, present in the system. b) The final temperature, in K.
The fin array is exposed to air at Tair = 20 degrees C with a convection coefficient of h = 40 W/m^2 K, and the fin array dissipates 130 W of heat to the convection enviroment.
Define the physical uncontrolled seat, including seat dimensions, weight, and springs and dampers characteristics. Draw the block diagram of the uncontrolled seat.
A tank fitted with an electrical resistor holds 2 kg of Nitrogen (N2), Initially at 1 bar. Over a period of 10 minutes, electricity is provided to the resistor at a rate of 120 W. During the same pe
A horizontal force F pushes a 10 kg block up a fricitionless ramp with a circular contour, the radius of curvature of the slop contour is 15 m. Calculate the normal acceleration of the block.
Refreigerant vapor exits at a pressure of 2 bar. If the heat transfer rate to the referigerant is 3.4 kW, determine the exit temperature in degree celcius, and the velocities at the inlet and exit,
An Ideal reheat Rankine cycle with water as the working fluid operates the inlet of the high-pressure turbine at 8000 kpa and 450 C; the inlet of the low-pressure turbine at 500 kpa and 500 C; and c
A horizontal force F pushes a 10 kg block up a fricitionless ramp with a circular contour, the radius of curvature of the slop contour is 15 m. Calculate the magnitude of the force at the instant whe
A recently negotiated union contract allows workers in a shipping department 24 minutes for rest, 10 minutes for personal time, and 14 minutes for delays for each four hours worked.
0.1 kg of propane is contained within a piston-cylinder assembly at 0.2 MP, initially with a specific internal energy of 272.5 kj/kg. Energy transfer by heat occurs slowly at a constant pressure res
A 4-m x 5-m x 6-m room is to be heated by a baseboard resistance heater. It is desired that the resistance heater be able to raise the air temperature in the room from 7°C to 23°C within 15
A propeller driveshaft is to transmit 2500 hp at 75 rpm. It is to be made of AISI 1040 WQT 1300 steel. Use a design factor of 6 based on the yield strength in sheer. The shaft is to be hollow with t