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Determine the scalar components Ra and Rb of the force R along the nonrectangular axes a and b. Also determine the orthogonal projection Pa of R onto axis a
What are the differences between airborne infectious diseases and diseases that are caused by air pollution? Give at least two examples for each category of diseases.
explain how mechanical strength, melting temperature , and thermal exapntion are related at the atomic level. specifically, how do they relate to each other and the bonding energy between the atoms.
Convert a stress of 4500 Newtons per square millimeter to kipsper square foot. Use complete and utterly perfect unit analysismethods. Do one one calculation line.
The yield stress for A-36 is 250 MPa. Using factor of safety against yield of 1.25, determine an appropriately sized beam such that the radius of curvature is not less than 140m. E= 200 GPa, G= 77.2 GPa.
Identify the contaminants on site and explain their hazards in relation to the proposed design and its construction. Describe the ‘In-situ’ and Ex-situ’ treatments that could be used and their relative merits
A square member is composed of a 12 inlong. 1 sq in area steel core with Young's modulus=29*10^6 psi andthermal expansion coefficient of 6.5*10^-6 /deg F
A sample of undisturbed soil has a dry weight of 110 lb and volumen of 1 ft^3. If the specific gravity of the soil solids is 2.65, determine the void ratio and the porosity.
A process is normally distributed and in control, with known mean and variance, and the usual three-sigma limits are used on control chart, so that the probability of a single point plotting outside the control limits
The outside and inside diameters of 75 mm and 63 mm, respectively. A strain gauge is placed on the outside of the hollow segment of the tube to measure normal strains in the longitudinal direction. assume E=73 GPa and Poissons ration v=0.33. strai..
A uniform ladder with a mass of 15 kg is placed on a frictionless vertical wall. An 80 kg person climbs up the ladder. If the coefficient of friction between the floor and the base of the ladder is 0.15, how far did the person climb
An open vat in a food processing plant contains 400L of water at 20 degrees C and atmospheric pressure. If the water is heated to 80 degrees C, what will be the percentage change in its volume? If the vat has a diameter of 3m
A Steel plate weighing 205 lb with a center of gravity at point G is supported by a roller at point A,a bar DE, and a horizizontal hydraulic cylinder BC. Negelcting all weights of all members except for the plate,
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