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A soil compacted in laboratory had an OMC of 13.5 % and corresponding bulk density of 1.65 gm/cc. The soil was left overnight due to which a 10% reduction in OMC was observed. The specific gravity of the soil solids was found out to be 2.46.What is the new max dry density corresponding to OMC?What is the present bulk density of the soil?Assuming the present OMC to fall on the 70% saturation line, what is the maximum dry density corresponding to OMC?Percentage of air content in the present soil at OMC?
A young engineer is asked to design a thermal protection barrierfor a sensitive electronic device that might be exposed toirradiation from a high-powered infared laser.
What percentage removal should be expected for each of the following particle settling velocities in an ideal sedimentation tank: 0.1 mm/s, 0.2 mm/s, 1 mm/s.
a brass wire of diameter d=1/6 in is stretched between rigid supports with an initial tension T of 37lb. assume the coefficient of thermal expansion is 10.6X10^-6 / F and the modulus of elasticity is 15X10^6 psi.
Consider the pressure-driven flow between stationary parallel plates separated by distance 2b. Coordinate y is measured from the channel centerline. The velocity field is given by u=u max(1-(y/b)^2).
The settlement analysis for a proposed structure indicates that 6cm of settlement will occur in 4 yr and that the ultimate total settlement will be about 25cm. estimate (a) the ultimate total settlement and ..
two steel spheres 100mm in diameter. Compute gravitational force and the force of mutual attraction F in newtons. the specific weight of steel is 0.284 lb/in^3
A human with a surface area of 2 m^2 and a surface temperature of 27 degrees celcius radiates into a large room (which acts as a black body), the surfaces of which are at 15 degrees celcius.
Determine the size PFR and CFSTR's required to treat 4000 m3/day of sewage with a BOD of 200 mg/L. State law requires a minimum of 92% removal and BOD follows first order kinetics.
Binder Classification (Grading) What is the best possible PG grade of the asphalt whose results are shown in Table 4 below? Use Table 9.3 from M&Z at end of assignment to help.
An observer has determined that the time headways between successive vehicles on a section of highway are exponentially distributed and that 60% of the headways between vehicles are 15 seconds or greater.
Calculate the Air flow required in CFM to transfer 5,396 BTU/Hour in an HVAC duct given that the temperature difference (Delta-T) between the room and the supply air is 21 DegF.
A steel bar is attached to a wood support beam with four 20 mm diameter lag screws. The steel bar is 75-mm-wide by 6-mm-thick. For the steel bar, the yield strength is 260 MPa and the ultimate bearing strength is 350 MPa.
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