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Calculate the effective Young's modulus for a cubic crystal loaded in the [110] direction in terms of the constants s11, s12, and s44. Do this by assuming uniaxial tension along [110] and expressing σ 1, σ 2,.. .,τ 12 in terms of σ [110]. Then use the matrix of elastic constants to ?nd e1, e2, . . .,γ 12, and ?nally resolve these strains onto the [110] axis to ?nd e[110].
at steady state a refrigeration cycle maintains a clean room at 55of by removing energy entering the room by heat
Explain what is meant by an overall heat transfer coefficient and explain what is mean by failing and what its effect will be on the value of the overall heat transfer coefficient.
refrigerant 134a at 140 f 60c and 125 psia 840 kpa enters the condenser of a chiller at 800lbh .1 kgs and exits as a
steam flows steadily through a nozzle. the steam enters the nozzle at p15mpa and t1350 c the steam leaves the nozzle at
Nitrogen gas (N2) undergoes a process from p1 = 10 bar, T1 = 300 K to p2 = 12 bar, T2 = 1000 K. Assuming ideal gas behaviour, determine the change in specific entropy, in kJ/(kg K), assuming:
What is the force P to keep the system in equilibrium for the angles specified?
a a diesel air-standard cycle has a condition at the beginning of the isentropic compression process defined by t1 300
Helium gas is contained in a rigid vessel of 0.5 m3 at 500 kPa. The gas is agitated violently by a stirrer that transfers 250 kJ of work to the gas. Assuming that the system undergoes an adiabatic process, determine the final pressure of the gas. Ass..
steam enters a turbine at 40 bars 440c and 100 ms through an pipe with a cross-sectional area of 0.050 m2. at the exit
Consider the isothermal compression of 0.1 moles of an ideal gas at 300 K from (P1=1.5 bar,V1=2 dm3) to (P2=3 bar,V2=1 dm3). The curve illustrates the internal pressure/volume relationship for the ideal gas at 300 K.If the compression of the gas is c..
Refrigerent 134a at a flow rate of 0.5 lb/s enters a heat exchanger in a refrigeration system operating at steady state as saturated liquid at 20 degrees Fahrenheit at a pressure of 20lbf/in^2. A separate air stream passes in counter flow to the refr..
a large stationary diesel engine produces 15 mw with a thermal efficiency of 40. the exhaust gas which we assume is air
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