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Calulate the carbon content at 0.95mm below the surface of the gear after an 8 hour carburazing time. Assume the carbon content at the surface of the gear is 1.25 wt %.
Determine the critical crack length for an internal crack in a thick 2024-t6 alloy plate that has a racture toughness Kic=23.5 MPa(sqroot)m.
Air enters the jet engine at a rate of 360 kg/s. Bypass air exits at 720 m/s while combustion air exits at 1200 m/s. What is the thrust in kN of this engine?
Find the maximum static load corresponding to the yield point. What should be the length of the spring so that when it is compressed solid, the stress will not exceed the yield point?
Determine the volume of 10 kg of carbon dioxide vapor at the surface of Venus. Show the detail of solution. Make sure your pictureand are clearness and can be readed.
What is the spring rate of each? What force is required to compress the nested assembly a distance of 1 inch? Two steel compression coil springs are to be nested.
What is the distance between the hook ends if the spring is extended until the stress just reaches the yield strength?
A helical compression spring is made of No. 18 (.0147 in) wire having a torsional yield strength of 108 kpsi. It has an outside diameter of ½ in and has 14 active coils. Find the maximum stat
Determine the heat transfer and the work, in kJ / kg. Also plot the process on a p-v and a T-s diagram. Show the detail of solution.
The initial pressure of a steam turbine inlet is 162 bar. If the inlet is at the above pressure and saturated vapor, calculate the isentropic efficiency if the exit is at 1 bar and quality X = .75.
A heat transfer from the system also occurs at a temperature of 1000 K. There are no other heat transfers. Ifno internal irreversibilities are present, determing the thermal efficiency.
The surroundings at temperature T in the amouint of q. If the gas constant of the gas is R, what is the entropy change of the gas (Delta_s) during this process?
An air cored solenoid has 100 turns of wire, the core has a diameter of 2cm and the length of the winding over the core is 20cm. The resistance of the winding is 4 Ohms.
Supposedly we designed a compound microscopic imaging system that has an objective producing lateral magnification of 40x. What focal length eyepiece will produce an overall magnification of 200x?
Use Boltzmann distribution to mathematically show that a two level laser system is not possible. Calculate the ratio of number of molecules per state at the room temperature.
Find Sketch the process on a T-s diagram and a p-v diagram. The net work per unit of air in kJ/kg. Heat addition in kJ/kg. Thermal efficiency.
Sketch the process on a T-s diagram. The net work per unit of steam flow in kJ/kg. Heat transfer to steam passing through the boiler, in kJ/kg. Thermal efficiency.
Water, initially saturated vapor at 4 bar, fills a closed, rigid container. The water is heated until its temperature is 400 degrees celsius. Determine the work done and the heat transfer.
At state 1, the refrigerant is a liquid-vapor mixture at 0.6 bar. At state 2, it is saturated vapor at 7 bar. Determine the quality of the liquid-vapor mixture at state 1.
Calculate the compressibility factor of the surface of the planet. Also determine the volume of 5 kg of carbon dioxide vapor at the surface.
Compresion is adiabatic to 9 bar, 60C ,and saturated liquid exits the condenser at 9 bar. Draw the (T-S) diagram of the cycle and determine the cooling capacity of the system, in tons.
At the beginning of the compression process P1=1bar and T1=300K. The maximum cycle temperature is 2000 K. For the cycle, determine the temperature at the end of each process.
Determine how long it takes to increase the speed of the train from 20 ft/s to 30 ft/s. What is the driving force exerted by the engine wheels on the tracks?
Some kg of ari is at an inital pressuuer aand temp of 1.73MN/m2 and 175C it is expanded iso thermal to three volme and further to sixx times iso compress.
Determine how far the spring must be compressed so that when the ball reaches a height of 8ft it has a velocity of 6ft/s.