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An inventor claims to have devised a refrigeration cycle that at steady state requires a net power of .8 hp to remove 13,000 Btu/hr of energy by heat transfer from the freezer compartment at -10F and discharge energy by heat transfer to a kitchen at 65F. What is the maximum thermodynamic coefficient of performance for the cycle.
a small sphere of reference-grade iron with a specific heat of 447 jkgk and a mass of 0.515 kg is suddenly immersed in
a tensile member of aluminum alloy 2024 - 0 had an original cross - sectional area of 4. 0 square inches. if the strain
determine the magnitude of the initial velocity of the bullet and the magnitude of the force exerted by the bullet on the block.
a standard steel specimen of 13 mm diameter elongated 22 mm when it was subjected to a tensile force of 29.5 kn if the
Friction between the piston and cylinder wall can be neglected because the process occurs so slowly. For the air, determine the initial and final pressures in kPa and the boundary work for the process in kJ.
a 10 ft3 vessel contains steam at 200 psi and 500degf. a valve on top of the vessel is opened and steam is expelled to
Draw the Mohr's circle for this stress state, deterrnine the principal stresses and the angle of the principal direction to the x-axis and determine the maximum shear stress.
Load that can be lifted by aerostat balloon An aerostat balloon is filled with hydrogen. It has a volume of 1000m^3 at constant air temperature of 27 degree C and pressure of 0.98bar.
a particle is launched with a horizontal velocity v0 0.55 ms from the 30 degree position shown and then slides without
Infrastructure Difficulty in siting new plants Cost and efficiency losses (5-8%) in transmission Power quality and dependability issues Higher Efficiency Efficiency is reduced by fuel processing Fuel is relatively inexpensive and plentiful (now) L..
two bars one having a circular section of radius b the other an elliptic section with semiaxes ab.for equal angles of
The assessment to design a substation and the associated protection System.
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