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Give four reasons for performing surface treatments
An arc welding machine uses a current of 1000A and has a resistance of 0.5Ω. Given that the velocity of the arc is 1500mm/s, calculate the heat input of the welding process
Express F as its magnitude times the appropriate unit vector and determine its x-, y-, and z-scalar components.
An expansive soil has an active-zone thickness of 10 ft. The natural moisture content of the soil is 25% and its liquid limit is 60. Calculate the free surface swell of the expansive soil upon saturation.
an energy-efficient house has been constructed so tightly that there is no air exchange with the outside. while this
a pison-cylinder contains 0.8 kg of steam of 300oc and 1 mpa. the steam is cooled at constant pressure until one-half
The valve is now opened which allows nitrogen to flow in and mix with the helium. The valve is closed when the pressure inside reaches 200 kPa, at which point the temperature inside is 40oC. Is this process consistent with the second law of thermod..
Figure shows a riveted lap joint. Determine a suitable diameter for the rivets if the ultimate shear strength of the rivet material is 325 MPa and a factor of safety of 6 is to apply.
In Fig there are 125 ft of 2-in pipe, 75 ft of 6-in pipe, and 150 ft of 3-in pipe, all cast iron. There are three 90° elbows and an open globe valve, all flanged. If the exit elevation is zero, what horsepower is extracted by the turbine when the ..
an airplane moves forward at a speed w1 971 kph. the frontal intake area of the jet engine is a1 0.8 m2 and the
a scuba divers 2-ft3 air tank is to be filled with air from a compressed air line at 120 psia and 100 degrees f.
counters a and b are non-paralyzable with dead times of 30 or 100 microseconds respectively. at what true event rate
The question related to Mechanical Engineering and the question is about drawing outlet and inlet valves for a compressor for controlling compressor. The symbols have been drawn with standard ISA symbols
Heat is transferred from a stream of water to the refrigerant in the evaporator, and from the refrigerant to another stream of water in the condenser. In a household refrigerator, from what substance or space does the refrigerant reject heat in the c..
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