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An uninsulated, irreversible steam engine whose surface temperature is 200.°F produces 50.0 hp with a steam mass flow rate of 15.0 lbm/min.
The inlet steam is at 400.°F, 100. psia; and it exits at 14.7 psia, 90.0% quality. Determine
(a) the rate of heat loss from the engine and
(b) its entropy production rate.
Friction between the piston and cylinder wall can be neglected because the process occurs so slowly. For the air, determine the initial and final pressures in kPa and the boundary work for the process in kJ.
if a truck carrying a crate on its bed brakes hard enough that the crate slides to the right relative to the truck the
Nitrogen enters a nozzle steadily at 1.2mpa and 600k with a velocity of 30m/s the inlet area of the nozzle is 0.005m^2 the nitrogen leaves the nozzle at 298k with a velocity if 400m/s. find the heat transfer rate during the process?
A uniform ?ow V ¼ 20i m=s is superimposed on a source of strength 20p m2/s and a sink of equal strength located at (22 m, 0) and (2 m, 0), respectively. The resulting body formed by the appropriate streamline is a Rankine oval. Determine the lengt..
A piston-cylinder assembly undergoes a cycle consisting of the following three processes: Compression with constant internal energy. Constant-pressure expansion with W_3-1=12.5 kJ
A floor system is to consist of beams, girders, and a slab; a partial floor plan is shown. Design the continuous one-way slab. Design the continuous beam along column line 2.
Calculate the load that a fibroblast cell applies to buckle a simple column collagen tissue engineering scaffold, given the column has a length of 100 um, is circular in cross section, with a diameter of 2 um, and has a young´s modulus of 5 Mpas. You..
For a dc motor, the starting torque and the no-load speed are known, which are denoted by Ts and ωo, respectively. The rotor inertia is J. Determine an expression for the dominant time constant of the motor.
a horizontal axisymmetric jet of air with 10 mm diameter strikes a stationary vertical disk of 200 mm diameter. the jet
a gas is contained in a vertical cylinder fitted with a piston. atmospheric pressure outside is 1 bar and the piston
Compute the volume of cutting, given that the width at formation level is 8 m and the side slopes 1.1/2 to 1. The centre depths of the cutting at 30 m intervals may be determined by subtracting the formation from the respective ground levels.
If the temperature of the outer surface is 400 K and its convection coefficient and emissivity are h = 20 W/m2 · K and s = 0.8, respectively, what is the temperature of the inner surface if the wall has a thermal conductivity of k = 0.7 W/m2 · K?
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