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Determine the inclination θ of the ladder if the coefficient of static friction between the friction pad A and the ground is μs= 0.3. Assume the wall at B is smooth. The center of gravity f
The compound beam assembly shown is made up of 4 members connected by pins and is supported by hinges/pins at A and E. L= 2.6m (L is the lengthD to E) , and w= 60 (w is the load-lines) .
A suburban street receives storm water runoff at a rate of 2.0 L/m-s (one each side). the street has a slope of .8 percent and a cross slope of 2 percent, n = .013.
A concrete sewer pipe is running under the finished water tank. The pipe can resist up to 2000 psi of applied pressure.Would the pipe be able to resist the applied pressure due to the water tank
A solid one-way slab is to be used for a framing system Column spacing is 33 ft, with regularly spaced beams occurring at 11 ft center to center. Superimposed dead load on the structure is 50 psf an
The drinking water needs of an office are met by large water bottles. One end of a .25 in diameter plastic hose is inserted into the bottle placed on a high stand, while the other end with an on/off
A single crystal of a FCC metal is oriented so that the [001] direction is parallel to an applied stress of 35.0 MPa. Calculate the resolved shear stress acting on the (111) slip plane in the [110],
A newspaper reports that in the last 5 years, prices have increased a total of 50%. this is equivalent to what annual inflation rate, and is it compounded annually
diameter spaced longitunally every 6 in. Knowing that the average allowable shearing stress in the bolts is 10.5 ksi, determine the largest allowable vertical shear in the beam.
A perfectly mixed aeration pond with no recycle serves as the biological reactor for a small community. The pond receives 30m^3/d of influent with a BOD5 of 350mg/L that must be reduced to 20mg/L be
general price inflation is estimated to be 3% for the next 5 years, 5% the 5 years after that, and 8% the following five years. If you invest $10,000 at the market rate of 10% for those 15 years,
A structural element subjected to cyclic loading is made of fc' = 3000 psi concrete. Compressive stresses are changing between 2200 psi and 1600 psi. The frequency of loading is 8 Hz.
Iron can exist in the FCC or BCC structure. For FCC iron, the crystal lattice parameter is a=0.3515nm and the atomic packing factor is 0.74. In an FCC structure, iron atoms have an atomic radius of
The next three questions relate to voice communications. Note that this topic was not covered in the class, but it is included to encourage self-learning. research, and analysis.
Given the initial effective stress state at a point within a soil mass (s_y=2.5 daN/cm2, s_x=1.5 daN/cm2, t_xy=t_xy=0.4 daN/cm2) and effective soil shear strength parameters at the same point
If a sample for BOD needs to be diluted by a factor of 0.02 , calculate the volume of sample that will be used in the BOD bottle
The maximum and minimum dry unit weights of a sand were determined in the laboratory to be 104 lb/ft^3 and 93 lb/ft^3, respectively. what would be the relative compaction in the field if the relativ
Assume excavation costs at $100/m3, side lining costs at $50/m2, and cover cost at 25/m2. Determine the dimensions of the pit that minimize cost -If the side slope is unconstrained and -If the side
45 ft wide, and 14 ft deep and treats 10 mgd. The power input to provide paddle-blade velocities of 1.0 and 1.4 fps for the inner and outer blades, respectively, is 930 ft'lb/s.
A sedimentation basin is used to remove suspended solids from a wastewater. The rate of flow of wastewater into the tank is 10 L/s, and the influent concentration of suspended solids is 200 mg/L.
During the recent camping trip, a curious junior engineering student (like yourself) noticed that water is being discharged from a high reservoir to a stream in the valley through a 0.3 m diameter p
Constructing the foundation causes changes in the levels of vertical stress at all points in the soil. One such point lies at the centre of the footing plan and is at a depth of 10m. Determine the i
Undrained Shear box tests were carried out on a series of soil specimens with the following results Total Normal Stress (kPa) Total shear stress at failure (kPa) Determine the cohesion and the angle o
The total number of effective exposures per unit of advertising medium depends on the region reached. In Louisiana, the number of effective exposures is 70,000, 100,000 and 75,000 for television, ra
A pre-sedimentation basin has been designed that reduces the river water suspended solids concentration from 500 to 200 mg/L. How many pounds of dry solids does this represent per million gallons of