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A study of the traffic using a tunnel showed that the following speed-concentration relationship applies:
u=17.2ln(228/k) mi/h
Find the capacity of the tunnel, the values of speed and oncentration at capacity, and the jam concentration.
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.
Maintenance expenses for a bridge in Georgia are estimated to be $200,000 for the first eight years followed by two separate million dollar expenditures in years 12 and 18. The expected life of the bridge is thirty years.
A 3000-lb car is traveling on a paved road with Cd (coefficient of drag) = 0.35, Af (frontal area of the vehicle) = 21ft^2, and p(air density)=0.002378 slugs/ft^3. Its engine is running at 3000rpm and is producing 250ft-lb of torque.
Determine the maximum allowable misclose for this engineering survey using the formula based on the munber of instriunent stations used in the work.
A new sports car has a drag coefficient of .30 and a frontal area of 21 ft^2, and is traveling at 110 mi/h. How much power is required to overcome aerodynamic drag if p=.002378 slugs/ft^3?
Conduct either a qualitative or quantitative risk assessment on this project. Identify the risk factors that you consider most important for the suspension bridge construction. How would you assess the riskiness of the project? Why?
Compare the stoichiometric air/fule ratios (AFR) for complete combustion of Benzene (C6 H6), Octane (C8 H8), and Ethanol (C2 H5 OH) in air (O2 + 3.76 N2). The only products should be CO2, H2O and N2.
An equal-tangent crest vertical curve is designed with a PVI at station 110+00 and a PVC at station 107+43.3. if the high point is station 110+75.5 what is the design speed of he curve?
The floor area of each floor in these buildings is 400 m^2. The buildings are separated by large lawns so that the (Exposure + Communication) factor = 1.2.
Determine: a) the height of the water, with respect to the base of each standpipe, and b) the effective stress at the depth of each standpipe, at the following times:
Roof trusses such as the one shown are spaced 6 m apart in a long, rectangular building. During the winter, snow loads of up to 1 KN/m^2 (or 1 KPa) accumulate on the central portion of the roof. Find the force in each member for a truss not at the..
By assuming a linear speed-density relationship, the mean free flow speed on a highway facility lane equals 65 mph. The jam density is observed to be about 170 vpm. 1. Plot the q-k-u curves
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