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Use entropy balance for a closed system to determine whether the entropy change of the following processes is positive, negative, zero, or indeterminate: a) Adiabatic compression, b) heating via an internally reversible process, c) isothermal cooling, d) adiabatic stirring, e) isobaric heating of an ideal gas, f) isothermal expansion of an ideal gas.
your job is to create a design of Rankine cycle that create the most possible power from this heat source . you may use any working fluid for which you can find the properties , assume the turbines 92% efficient and pumps 85%
a single stream tube is selected to characterize the air flow past the wing of an aircraft in flight at an altitude of
consider the brass alloy the stress-strain behavior of which is shown in the animated figure 6.12. a cylindrical
find the sum of two harmonic motions of equal amplitude but of slightly different frequencies. discuss the beating
What is the velocity and rate of flow of the metal into the mold? Is the flow turbulent or laminar? (Pure aluminum density ρ = 2.7 g/cm3).
a 200-kg 5-m-wide rectangular gate shown innbspthe figure is hinged at b and leans against thenbspfloor at a making an
ammonia vapor flows through a valve. it enters the valve at a pressure of 8 bar and a temperature of 120c and after
a refrigerant 134a at 140 kpa and -10 degree celcius is compressed by an adiabatic 16kw compressor to an exit state of
a well-insulate compressor take in air at 80of at 14.7 psi with a volumetric flow of 1200 ft3min. the compress air
the melting temperatures for various materials are listed in the inside cover of callister. some representative values
Two flat, rectangular plates with a lateral dimension w*l lie parallel, one above the other, a distance h apart. The gap between them is filled with molten polymer.
given that the relaxation time a is 177.46 days what is the activation energy of a rubber band if the pre-exponential
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