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A copper-zinc alloy has the following properties
Grain Diameter (mm)
Strength (MPa)
0.015
170 MPa
0.025
158 MPa
0.035
151 MPa
0.050
145 MPa
Determine
(a) the constants in the Hall-Petch equation; and
(b) the grain size required to obtain a strength of 200 MPa.
A waster water treatment operator runs a sludge volumeindex test in a liter cylinder and finds at the end of 30 minutessettling, the solids occupy 200mL. He knows the suspendedsolids concentration in his aeration tank from which he got thesample is 4..
the turbopump unit in the engine nominally operates at 7000 rpm, and a result of design issue, the actual thrust provided by the engine oscillates harmonically with an amplitude of 10 KN at the same rotational frequency as the turbopump unit.
Bob and Tom live in a university dorm. Bob values playing loud music at a value of$100. Tom values peace and quiet at a value of$150.Which of the following statements is true?
Calculate uniform load (in addition to self wt.) which will cause the section to begin cracking
Determine the maximum rimpull of the tractor in each of the indicated gears if the efficiency is 92%. If the tractor is operated over a haul road whose slope is +2.5% with rolling resistance of 80 lb/ton
Design an R.C.C. stair located in a stair-case hall measuring 2.5 m x 5.5 m. The vertical distance between the floors is 4 m. Draw a dimensional plan and section of the proposed stair.
What additional vexation occurs when two of these pumps are in parallel? How might we avoid instability?
what policies were implemented during and after WW1,WW2,Cold war?
Determine the specific surfaces in m2/g units for the spheres of diameters (a) 10.0 cm, (b) 1.0 cm,(c) 0.1 cm, (d) 0.01 cm. (e) 0.001 cm and (f) 0.0001 cm. Assume the mass density of spheres as 2.5g/cc.
An aggregate blend is composed of 53% coarse aggregate by weight (sp. gr. 2.702), 43% fine aggregate (sp. gr. 2.621), and 4% filler (sp. gr. 2.779)/
The maximum speed of trains for urban rail transit is 60 mph and maximum acceleration/deceleration rates allowed for standing passengers are 5 feet/sec2. Part A) If the station spacing is determined at 1000 ft, what is the maximum average running s..
A simply supported beam 100 feet in length is pinned at its left end and supported on a roller at its right end. There is a uniformly distributed load of 10 kips/ft along the entire length of the beam. There is also a concentrated load of 20 kips dow..
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