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Air, initially at 220 kPa and 450 K undergoes a polytropic state change to 374 kPa and 495 K. What is the polytropic exponent of this process?
And
Saturated water vapor is contained in a rigid container. Heat is then added until the pressure and temperature become 861.818 MPa and 400 ?C, respectively. What was the initial temperature of the steam?
saturated steam at 2 mpa is contained in a piston-cylinder device. the initial volume is 0.25 m3. heat is slowly
A balloon is inflated with helium gas to a pressure of 100 kPa gauge. The volume of the balloon is 0.4m^3. The initial temp is 20 degrees C. The helium gas can be treated as an ideal gas. the atmospheric pressure is 101.3 kPa
an air conditioner based on the ideal vapor-compression refrigeration cycle uses r134a as the working fluid. states
how to solve the following1 for integrated circuits al lines are commonly placed on si to act as electrical conductors
a 80 kg resting person with a constant core temperature near 37 c transfers heat at the resting rate to hisher
energy is added to a piston cylinder arrangement, and the piston is withdrawn in such a way that the quantity PV remains constant. the initial pressure and volume are 200kpa and 2m3, respectively. the final pressure is 100kpa, calculate the work d..
A 2-m^3 rigid tank contains refrigerant-134a vapor at 1.4 MPa, 180C. Determine the mass of the refrigerant in kilogram using:
Tensile force formulas, A cylindrical steel beam is 2 inches diameter and 6 feet long. The modulus of elasticity is 30 x 1,000,000 psi. If the beam is subjected to a tensile force of 1000 lbs, what will be the resulting unit strain?
consider 100 kg of steam initially at 20 bar and 240 degrees c as the system. determine the change in exergy in kj for
1. for each of the two proposed replacement presses determinenbspa. initial investment.nbspb. operating cash inflows.
if an isotropic material has a poissonamp39s ratio v. find the percent of volume change after a cube specimen is
using the known radius of the earth and that g 9.80 ms2 at the earths surface find the average density of the earth.
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