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A system contains a substance that is initially at 100 °C and 1 MPa and it later at 0 °C and 100 kPa. Determine the change in specific enthalpy for the process if the unknown substance is: a) liquid kerosene, b) helium gas (He), c) solid aluminium (Al), d) air. Use the most accurate method available for all cases.
a piston cylinder device initially contains steam at 200 kpa 200 degree c and 0.4 m3. at this state a linear spring is
the environment in a certain area is 15 degrees c. plot the maximum efficiency of a nuclear power plant as a function
air as an idea gas is compressed from a state where the pressure is 0.1 mpa and the temperature is 27oc to a state
how much error would one expect in determining the specific enthalpy by applying the incompressible-liquid
a rigid tank contains 7.5 kg of saturated water mixture at 400 kpa. a valve at the bottom of the tank is now opened and
The velocity profile for a fully developed laminar flow in a circular tube can be described using u = umax [1 – (r/R)2]. Obtain an expression for the shear force per unit volume in the x direction for this flow.
consider a supersonic wind tunnel with test section mach number of 2 and fixed geometry diffuser designed to operate
the 65-mm diameter steel shaft is subjected to the two loads that act in the directions shown. if the journal bearings
what is the indentation diagonal length when a load of 0.75 kg produces a vickers hv of 510? calculate the vickers
Determine a symbolic expression for the total thermal resistance of wall, including inside and outside convection effects for prescribed conditions.
an ideal brayton gas refrigeration cycle uses air. the air is at 5 psi and -10f when it enters the compressor. the
Design a wide flange, simply supported beam below so that the stress due to bending does not exceed that allowed by AISC for A36 steel and calculate the shear stress where the parts join as indicated. Maximum V = 10,000 lb.
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