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The welding power generated in a particular arcwelding operation = 3000 W. This is transferred to the work surface with a heat transfer factor = 0.9. The metal to be welded is copper whose melting point is given in Table 29.2. Assume that the melting factor = 0.25. A continuous fillet weld is to be made with a cross-sectional area = 15.0 mm2 . Determine the travel speed at which the welding operation can be accomplished.
a copper vertical plate that is 0. 305 m tall and 1. 5 m wide separates two large air spaces. the air space at the left
An adiabatic heat exchanger is used to heat cold water at 8°C entering at a rate of 3 kg/s using hot air at 150°C entering with the same mass flow rate. If the air’s exit temperature air is 30°C,
a quartz sphere of 20mm diameter is pressed into a flat thick carbon steel plate with a force of 5 n. find the maximum
Design a PID velocity controller for the system. The angular velocity of output shaft should be controllable in the range -3000 to 3000 RPM. Clearly describe and document the controller you used as well as how you chose the controller gains
a 25-mm-diameter steel column with a length of 950 mm was analyzed to determine the critical buckling load. the column
1. Refer to Problem 3.19. Using Eq. (3.51), determine the variation of the relative density with depth. Use Qc 5 1.
surface geostrophic velocity 0.5 ms density 1026kgm3 gravity 9.8ms ring radius 50km. you take velocity measurment
refrigerant 134a at a rate of 0.8 lbs enters a compressor operating at steady state as saturated vapor at 30 psia and
Prob. 8.46 The machine part ABC is supported by a frictionless hinge at B and a 10° wedge at C. Knowing that the coefficient of static friction is 0.20 at both surfaces of the wedge, determine (a) the force P required to move the wedge to the left..
Considering the flow of a uniform stream of speed V in the x-direction, a source of strength Q at (-1,0) and sink of strength Q at (1,0). Find the velocity potential and the stagnation points
A converging-diverging nozzle operates at steady state. Air as an ideal gas with k 5 1.4 enters the nozzle at 500 K, 6 bar, and a Mach number of 0.3. The air flows isentropically to the exit plane, where a normal shock stands. The temperature just..
a deep-water oil rig has just collapsed into the gulf of mexico. its blowout -preventer system has failed so thousands
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