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The high-temperature heat source for a cyclic heat engine is a steady-flow heat exchanger where R-134a enters at 80?C, saturated vapor, and exits at 80?C, saturated liquid, at a flow rate of 5 kg/s. Heat is rejected from the heat engine to a steady-flow heat exchanger, where air enters at 150 kPa and ambient temperature 20?C and exits at 125 kPa, 70?C. The rate of irreversibility for the overall process is 175 kW. Calculate the mass flow rate of the air and the thermal efficiency of the heat engine.
The acceleration of a particle traveling along a straight line is A= (0.02e^t) m/s^2, where t is in seconds. If v=0, s=0 when t = 0, determine the velocity and acceleration of the particle at S= 4m
The specific heat (C sub p) of aluminum is 0.214 calories per gram degrees Celsius (0.214 cal/g-C). If a cube of aluminum with a mass of 13.6 kg exhibits a change in temperature of +30 degrees Celsuis, what is the resultant thermal energy
Estimate the elastic, shrinkage, and total axial deformation of a concrete column after 2 years of permanent load application. Assume the full structural load was applied at 28 days after placing concrete.
The small pulley attached to the block has negligible mass and friction. (Suggestion: First establish the kinematic relationship between the accelerations of the two bodies.)
A water pipe gradually changes from 6 in to 8 in diameter accompanied by an increase in elevation of 10 f t. If the pressure at the 6 in and 8 in sections are 9 psi and 6 psi respectively, what is the direction of flow for 3 cfs flow
Find the correction for the calibration of the measuring tape using its formula. During the calibration of the measuring tape on comparator of 100.000m the length of the tape turned out to be of 99.993m
How does this result differ from the case of oblique impact with zero force interaction in the vertical direction and e=0 ?
What effect does removing 70-100 sieve fraction have on the head-loss characteristics and on the depth of expanded bed and Comment on the differences and likely reasons for the differences.
One gram of pepper is placed into a 100 mL beaker, and the beaker is filled with water to the 100 mL mark. What is the concentration of pepper in mg/L? What should one assume in this problem? What is the density of pepper? What is the volume of 1 g o..
A cylindrical specimen of a metal alloy is stressed in compression. if its original and final diameters are 40.00mm and 40.10mm respectively, and its final length is 120.00mm, compute its original length (L1) if the deformation is totally elastic.
A bridge is subjected to a load of 10,000 kN at its mid span, yielding a displacement of 5 millimetres at that location. What will be the bending stiffness of the bridge in this case (make sure the unit is given)
A 2000-lb wheel load is to be supported by aggregate over soil with a maximum bearing pressure of 1000 lb/sqft. What depth of aggregate is needed if the angle theta is 40 degrees?
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