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A motor consumes 1200 hp of electrical power when operating at steady state. The motor receives an input voltage of 560 VDC (DC stands for direct current).
The height of the building wall is 12t, and the width is 20ft. A net energy flux of 110 Btu/h*ft^2 from the sun is absorbed in the wall and subsequently dissipated of the surrounding air by convection
What are effects of the annealing process on the density of these dislocations ? Can you give examples for materials? Determine the relation between density of dislocations and deformation behavi
When the balloon reaches an altitude where is is neutrally buoyant, it transmits information about weather conditions to monitoring stations on the ground. Is this Lagrangian or an Eulerian measuremen
A 50-mm diameter ball is pressed against a flat surface by a force of 500 N. The material is steel for both (E = 200 GPa, v = 0.3).
The wall of a refigerator is constructed of fiberglass insulation (K=0.035W/moC) sandwiched between two layers of 1mm thick sheet metal(K=15.1W/moC).
The two bars are made of polystyrene, which has the stress-strain diagram shown. If the cross-sectional area of bar AB is 950 mm2 and BC is 2500 mm2, determine the largest force P that can b
Consider the flow field presented by the potential function φ = X^6 - 15x^2 y^2 + 15 x^2y^4 - y^6. Verify that this is an incompressible flow and obtain the corresponding stream function.
In a paint plant, semiautomatic mixers are normally used. It takes 8 minutes for an operator to load a mixer with the appropriate ingredients.
Determine the minimum distance from a 50 ft height building from which the ball can be thrown and not hit the side of the building , but it may land on the roof depending upon how long the building is
Determine the displacement from the origin to point 2, and the average velocity from the origin to point 2. Remember that velocity is a vector quantity so find the magnitude of the average velocity an
Water is to be heated from its pipeline temperature of 20°C to 90°C using superheated steam at 450°C and 2.5 MPa in a steady-state process to produce 10 kg/s of heated water.
A bakelite plate (see Fig. 2) with an elliptical hole is being examined to ßnd the stress concentration factor. It is in a state of plane stress. By a method called photoelasticity.
World reserves of chromium are about 800 million tons, and current usage is about 2 million tons per year. if growth in demand for chromium increases exponentially at a constant rate of 2.6 percent pe
At a point on the free surface of a machine part the maximum shear strain is 250 ?rad. It is also known that the sum of the normal stresses on two perpendicular planes passing through the po
An anionic living polymerization of styrene is conducted with an initial monomer concentration of 2 mol/L and an initial initiator concentration of 0.001 mol/L. Determine Mn, Mw, and PDI at 75% conver
A paper clip is made of 0.05-in diameter wire. If the original material from which the wire is made is a rod that had a diameter of 0.70-in.
Determine the exergy, in kJ, of the contents of a 1.5m^3 storage tank, if the tank is filled with air as an ideal gas at 440 degrees Celsius and 0.7 bar.
A shaft wit a channel section shown in fig. 3.40 is subjected to a torque T. Assume that neither end is constrained. Find the warping distribution on the cross-section, the maximum warp, and the locat
A mixture having a molar analysis of 50% CO2, 33.3% CO, and 16.7% O2 enters acompressor operating at steady state at 37 oC, 1 bar, 40 m/s with a mass flow rate of 1kg/s and exits at 237 oC, 30 m/s.&nb
What is the rotation matrix for an object rotation of 30o around the z axis followed by 60o around the x axis and followed by a rotation of the y axis. all rotations are counter clockwise.
In a copper crystal, assume that the atoms interact with each other through the first and the second nearest neighbors.
A 6-in-diameter cast-iron (E = 14.5x106 psi; ? = 0.211) wheel, 2 in wide, rolls on a flat steel (E = 30.0x106 psi; ? = 0.292) surface carrying 800 lb load.
Water is being pumped from a large lake to a reservoir 30 m above at a rate of 5x10-3 m3/s by a 12 kW (shaft) pump. If the irreversible head loss of the piping system is 8m, determine the mechanical e
In a chemical milling operation on a flat mild steel plane, it is desired to cut an ellipse-shaped pocket to a depth of 0.4 in. The semiaxes of the ellipse are a=9.0 in and b= 6.0 in.