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Calculate the minimum power required to convert 1 mole/sec of oxygen gas at 298 K and 1 atm to saturated liquid oxygen at 1 atm and 90.13 K (the atmospheric pressure boiling temperature) in a process in which heat is rejected to the environment at 298 K. The following data are available for oxygen constant pressure heat capacity for oxygen gas = 29.14 J/mole K heat of vaporization at 90.13 K = 6820 J/mole.
a refrigeration engineer has designed a steady-flow no work interaction device that separates a continuous flow of 100
For the process where q= 62.5 kj/kg and wkcs= 60 kj/kg determine the energy change if the system mass is 2 kg.
A second-order differential equation x"+9x with initial conditions x(0) = 2 and x'(0) = 0. A first-order differential equation x' + 2x = e^-5t with no initial conditions ( x(0) = x'(0) = 0). Given the differential equation x"+ 6x = f, where f(t) is t..
r-134a at 20 psia and 40of is compressed slowly adiabatically and without friction to a final pressure of 200 psia.
two perfectely black squares 10 ft x 10 ft are spaced 20 feet apart. what is the net rate of heat exchange between them
assume frictionless flow in a long horizontal conical pipe. the diameter is 12 inches at one end and 6 inches at the
An elevator descends from rest with an acceleration of 5 ft>s2 until it achieves a velocity of 15 ft>s. Determine the time required and the distance traveled.
Estimating fractions of a cost, Estimate what fraction of the price of a pocket calculator is required to cover the cost of developing the product.
Capture the Rayleigh line between Mach number 0.2 to 4.0 initially by adding heat q in small increments taking the flow to M = 1 at location 2, there after removing heat until you achieve M = 4. Use the differential equations
consider an oblique shock wave with a wave angle of 30 degree. the upstream flow mach number is 2.4 calculate the
a particle is moving along a straight line from an origin o and has acceleration a of ks ms2 where k is a constant s is
initially 1.361 kg of steam is contained in a piston-cylinder device at 260 oc with a quality of 0.7. determine the
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