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A bridge having a horizontal top cord is span between tow piers Aand B having an arbitrary height. It is required that apin-connected truss be used, consisting of steel members boltedtogether to steel gusset plates. The end supports are assumed to bea pin at A and a roller at B. A vertical loading of 5 kN isto be supported within the middle 3m of the span. This loadcan be applied in part to several joints on the top cord withinthis region or to a single joint at the middle of the topcord. The force of the wind and the weight ofthe members are to be neglected. Assume themaximum tensile force in each member cannot exceed 4.25 kN; andregardless of the length of the member, the maximum compressiveforce cannot exceed 3.5kN. Design the mosteconomical truss that will support the loading. The members cost $7.50/m and the gusset plates cost $8.00each. Submit your cost analysis for thematerials, along with a scaled drawing of the truss, identifying onthe drawing the tensile and compressive force in eachmember. Also include your calculations of thecomplete force analysis.
Evaluate the percent mass loss for each of the three thermal events indicated on the attached TGA trace
A rectangular unfinished concrete channel with wood forms is laid on a bottom slope of 0.0064 to carry a flow of 20m^3/s of water. Determine the width of the channel when the flow is in critical condition.
the weigt w causes atension of 100 lb ic cable cd. if d=2ft, what is the moment about the z axis due to the force eserted by he cable cd at point c.
When water flows at 100 m3/hr, the pressure gauge immediately upstream of the basket strainer measures 1 bar. When the basket strainer is clean, the pressure immediately downstream measures 0.9 bar.
Write the mass balance equation for a completely mixed lake with an impulse input of mass, M, added at time t = 0. Assume the lake is of constant volume, V, with continuous outflow, Q, and a conservative substance.
A fellow I know wanted to know the coefficient of friction between steel and commercial carpet. The value was not in the tables of any textbook he had, so he devised an experiment.
A borehole at a site reveals a soil profile comprising 6 m deep fine sand layer overlying a 9 m thick clay layer, which in turn overlies weathered bedrock. The groundwater table is located at a depth of 4 m from the ground surface.
A non-reactive chloride solution is continuously discharged into an aquifer. The concentration at the discharge location is 800 mg/L. Determine the maximum concentration of chlorides to be observed at an observation well 30 m downstream of the disc..
Determine the maximum external pull, in each of the four gears, for a tractor with 23-hp, and a max speed of 3.6 mph in 1st gear and a efficiency of 92%. When it is operated over a haul road whose slope is +2.53%.
If the slotted arm OA rotates counterclockwise with a constant angular velocity of thetadot= 2.0 , determine the magnitude of the velocity of peg P when theta= 58. Determine the magnitude of the acceleration of peg P when theta= 58.
Devise an absolute temperature scale where the boiling point of water at 1 atmosphere (101 kPa) pressure = 100 degrees in your scale. What is the ice point of water in your scale
Draw block diagrams of the unit operations necessary to treat the following wastes to effluent levels of BOD5 = 200 mg/L, SS = 100 mg/L, P = 5 mg / L (required for discharge into a sanitary sewer).
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