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For a steel alloy it has been determined that a carburizing heat treatment of 9-h duration will raise the carbon concentration to 0.38 wt% at a point 1.4 mm from the surface. Estimate the time (in h) necessary to achieve the same concentration at a 6.1 mm position for identical steel and at the same carburizing temperature.
consider a regenerative cycle utilizing steam as the working fluid. steam enters the turbine at 3.5 mpa 400oc and
What value of G makes the two series of cash flows described below equivalent at an interest rate of 3% per year, compounded every 3 months? 22 annual deposits in the amount of $400. 11 annual deposits in the amount of $400 in the first year, and inc..
a cannonball with mass m is fired with an initial speed v0 at an angle theta ablve the horizontal. compute the time it
ti-6al-4v is a metal alloy use to make biomaterials. its composition is 90 ti 6 al and 4v mass percents. what are the
a crate with weight w165 lb and mass center g is placed on a slide and released from rest as shown. the lower part of
air is contained in a variable-load cylinder-piston device equipped with a paddle wheel. initially the air is at 500
a pilot tube mounted on a aicraft flying at 2700 m measures a differential pressure of 30mmhg. assuming a standard
Determine the natural frequencies of the system. For the baseline system I get natural frequencies at the following engine speeds: 435, 2026, 2818, 5225, 7093, 10245, and 12153 rpm.
2. What is the design objective? -to minimize the required power input to the compressors 3. What parameters does the design engineer control?
billiard ball a of mass. ma0.400kg moving with speed va1.80ms strikes ball b initially at rest of mass mb0.500kg. as a
reflection-existing competenciespart-11. reflect on and self-assess your current achievements of engineers
a stack was sampled for 8 minutes. the gas velocity at stack conditions through the sampler was 15.0 ms and the area
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