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A heat engine accepts 200,000 Btu of heat from a source at 1500 R and rejects 100,000 Btu of heat to a sink at 600 R. Calculate the entropy change of all the components of this engine and determine if it is completely reversible. How much total work does it produce?
An air heater may be fabricated by coiling Nichrome wire and passing air in cross flow over the wire. Consider a heater fabricated from wire of diameter D=1 mm, L= 2m, electrical resistivity rho=10^-6 ohms, thermal conductivity k=25W/mK, and emiss..
an engine uses methanol ch3oh as a fuel with 300 excess air. air enters the engine at 1 bar and 25 c and is mixed with
an ice chest is constructed of 0.4 mm thick plain-carbon steel plate a 1.9 cm thick layer of styrofoam k0.033 wm c and
a freshly drawn glass fiber 100 microm in diameter breaks under a tensile load of 40 kn . after subsequent handling a
a steam power plant receives 1000 btus in the boiler at 1250 f and discharges 600 btus in the condenser at 80 f. the
a walk-in cooler using a vapor compression refrigeration cycle is configured as shown below. the cycle uses cfc22 or
a projectile is launched from point a and with a speed u making an angle of theta with the horizontal. it collides at
What is the effect of immersion depth on a glass electrode and what aspects of the design of a pH electrode installation would lead to reduced manual maintenance and improved reliability
how does the statistical mechanical definition of entropy allow a reinterpretation of the second and third law of
give the schematic representation of the equilibrium microstructures for a lead-tin alloy of composition 45 wt of tin
a certain material 2.5 cm thick with a cross-sectional area of 0.1 m2 has one side maintained at 35oc and the other at
vinefera grapes are picked when the outside temperature is 35c and then cooled to 5c within a 12-h period. for each
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