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An ideal gas undergoes a process between two specified temperatures, first at constant pressure and then at constant volume. For which case will the ideal gas experience a larger entropy change? Explain.
the inner and outer surfaces of a 6-m x 7-m brick wall of thickness 41 cm and thermal conductivity .69 wmc are
the pressure of a gas inside a piston-cylinder device is initially balanced by an atmospheric pressure of 100kpa and an
a gas mixture consists of o2 and n2. the ratio of the mole numbers of nitrogen to oxygen is 31. this mixture is heated
water at 50kpa and 150 deg celsius enters a constant-area pipe a0.08m2 with a velocity of 11ms. at some point farther
a piston-cylinder initially contains 2.52 kg saturated liquid water at 200 degrees celcius. now heat is transferred to
calculate the specific exergy for i water and ii r-134a and iii air at p 0.6 bar and t 10oc. assume to 20oc and po
as a particle moves from the origin to 12i 6j m it is acted upon by a force given by 4i 8j n. calculate the work done
Helium enters subsonically and flows isentropically through the converging-diverging duct. Compare the values of Ma, T/T0, and P/P0 for helium with those for air at several locations in the duct. Use 0.163 ≤ Ma ≤ 3.221.
at steady state a heat pump maintains the interior of a house at 77f by transferring to it 30 kw of heat from the
the capacitance in a series rcl circuit is c1 2.74 ?f and the corresponding resonant frequency is f01 6.57 khz. the
a mass of 5 lbm is released when it is just in contact with a spring of stiffness 25 lbfft that is attached to the
a pump fitted with 50mm bore ball bearings uses an oil whose viscosity ranges from 100cst at cold pump start-up to
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