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answer the given below question
Consider a 1000-W iron whose base plate is made of 0.5-cm-thick aluminum alloy 2024-T6 (p= 2770 kg/m3 and cp 875 J/kg · °C). The base plate has a surface area of 0.03 m2. Initially, the iron is in thermal equilibrium with the ambient air at 22°C. Assuming 85 percent of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 140°C.
Given an aluminum simply supported beam with overhang, determine the applied load at the free end with a max deflection of 1". b= 1" h= 0.25" L=12" l= 24" E= 10,000 ksi
estimate the theoretical production of landfill gas (CH4 only) from the degradation of 20.3 kg of rapidly decomposable MSW. asssume the density of methane is 0.7177 kg/m^3.
What are the expressions for the shear, V, and the bending moment, M, within the beam between points C and D in terms of Ay, M1, l, w, and x, the distance to the sectional cut from the beam's left end
You are preparing a life-cycle assessment of different transportation options for getting from your house to work (10 miles each way). The options include carpooling with three or more people, one person in a car, bicycling, or taking the bus.
A concrete mix with a 3 inch slump, w/c (water content) ratio of 0.50, and sand with a fineness modulus of 2.4 contrains 1700 lb/cubic yard of coarse aggregate. Compute the required weight of the coarse
Sewage flows through a 12" diameter pipeline then through an 18" diamenter pipeline. The flow is the same (unknown) value in each pipe, and the slope is the same (unknown) contant value for both pipes.
A construction company requires to know how much of additives A and B to use to prepare concrete to be used in a freezing environment (northern location). The concrete mix should contain a minimum concentration of nitrate and sulphate.
Suppose a specialty steel company receives an order for 200 tons of steel containing at least 3 percent nickel and 2 percent manganese, with a carbon content not exceeding 3.5 percent. The steel will sell for $25 a ton.
The beam over a 3ft wide outside door is to be concrete to support the brickwork above the door. The moment has been calculated to be 4005in-Ibs and the beam is 4 inches wide and 6 inches overall height.
why the highest head of the water in the excavation is mathematically guaranteed to occur on the edge of the excavation. explain in mathematical and/or physical.
three bars each made of different materials are connected together and placed between two walls when temperature is t1
A pharmaceutical wastewater needs a minimum of BOD/N/P of 100:5:1 for biological treatment. the wastewater characteristics are BOD= 800 mg/l, among which 95 % are soluble, suspended solids 250 mg/l, soluble nitrogen as element nitrogen = 24 mg/l, and..
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