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1.A circular bar under pure torsion needs to transfer 50 N*m of torque. The total bar length is 1 m and the total rotation can not exceed 2 degrees. The bar is made of a material with G=3000 MPa. What is the minimum diameter of the bar?
2.A bar 25in long attached to one wall was heated by 100 degress F. There is a .5 in gap between the bar and the other wall. The area of the bar is .5 in^2.The coefficient for expansion is .0004/F and the modulus of elasticity is 230 ksi. Find the final stress in the bar.
A square footing 2 meters by 2 meters is to be constructed 1.22 meters below the ground surface. The groundwater table is located 1.82 meters below the ground surface.
a reversible refrigerator removesm heat from sink at 8c and rejects heat to the atmosphere at 15c the refrigerator is coubled to the outputnof a reversible heat engine which receives heat at 577c and reject to the atmosphere at 15c
A pickle producing plant produces and discharges a waste brine solution with a salinity of 13,000 mg/L NaCl at a rate of 0.14 MGD into a stream. Before the discharge enters the stream, the flow rate of the stream is 1.2 MGD and the salinity is 20 ..
Plot the relationship between the approach speed v and thelength of the dilemma zone for the following data:a2 = 0.5g, δ2 = 1.0s,w = 65ft, L = 15ft, and τ = 4.5s (wherea2 is the acceleration
In designing of access ramps for drainage channels, why should the direction of access ramps be sloping down towards downstream?
A wheel tractor-scraper is operating on a level grade, assuming no power derating is required for equipment conditions, altitude, and temperature.
Determine the stability of the wall before and after the rainfall. Neglect seepage effects and which of the two walls in Figure gives the large horizontal force
A 2.0m-wide strip at a depth of 1 m in a stiff clay carries a wall load of 425 kN/m. The saturated unit weight of the caly is 20kN/m^3. TRiaixal tests give the following results: c'=10 kPa, phi'=28 degree, cu=105kPa, and phi_u = 0.
The distribution coefficient of styrene distributed between ethylbenzene and ethylene glycol at 25 degrees C is .19 mass fraction in the ethylene glycol phase per mass fraction in the ethylbenzene phase.
Air enters an air - standard Otto cycle with a pressure and temperature of 1 bar and 15 C respectively. The compression ratio is 9 and the bore and stroke of the cylinder are (10 cm, 12 cm).
Two parallel plates, one moving at 4m/s and the other fixed, are seperated by a 5mm thick layer of oil of specific gravity 0.80 and kinematic viscocity 1.25 X 10^-4 m2/s.
The plate OAB forms an equilateral triangle which rotates counterclockwise with increasing speed about point O. If the normal and tangential components of acceleration of the centroid C
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