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One-half kilogram of water executes a Carnot power cycle. During the isothermal expansion, the water is heated until it is a saturated vapor from an initial state where the pressure is 1.5 MPa and the quality is 25%. The vapor then expands adiabatically to pressure of 100 kPa while doing 403.8 kJ/kg of work.
a) Evaluate the heat and work for each process, in kJ.
b) Evaluate the thermal efficiency.
What is the primary difference between the strength of a structure and the strength of a material? Is a strong material stiff?
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A rocket is launched vertically and reaches its maximum height hmax. What are its velocity, v(t)= (dh/dt) , and height above ground h(t) as a function of time t >_ 0(greater than or equal to) before it lands on ground (h = 0)?
A room has 1000 ft2 of surface, of which 120 ft2 is to be heated, and the balance has an average surface temperature of 60°F. The air temperature in the room is 68°F. The room is occupied by light clothed adults at rest. Determine the surface tempera..
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Calculate the number of vacancies per cubic meter in some metal at 753°C. The energy for vacancy formation is 0.81 eV/atom, while the density and atomic weight for this metal are 6.38 g/cm3 and 49.43 g/mol, respectively. Find in m^-3 units.
In a reheat rankine cycle, steam enters the turbine at 4 MPa and 400 C. After expanding to 400 kPa, the steam is reheated again to 400 C, and expands in the low pressure turbine to 10 kPa. If the efficiency of the turbine and the pump is 100% and the..
consider a solid bar in the shape of a hook shown in figure 1. a coordinate system is also shown. a load p is applied
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