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From a photograph one observs that on a level section of highway 20% of the vehicles are trucks, 80% are cars, and that there are 50 vehicles per mile of highway. The trucks travel at 40 mph, the cars at 50 mph. This highway also has a section with a steep grade on which the speed of the trucks drops to 20 mph, and the speed of the cars to 40mph. No vehicles enter or leave the observed sections of the highway (except at the ends), and the flows are stationary. There is no traffic congestion, gueuing or vehicle backup on this highway. Determine the percentage of trucks as seen by a stationary observer on the grade.
Plot the variation with depth (z) of the at-rest lateral earth pressure behind the wall, and determine the magnitude and location of the at-rest lateral earth force per unit length of wall.
Given the binary variables x1,x2,x3,x4 and x5, formulate a set of constraints that will enforce x3,x4, and x5 to equal one if x1=1 and x2=0.
Design the roof slab as a one-way slab system and use the worst case design scenario to determine the reinforcing for the entire roof
An unconfined compression test was conducted on a compacted soil sample, 50 mm diameter by 100 mm long. The peak axial force recorded was 230 N and the sample shortened by 2 mm.
If an additional 11-ft lane is added (each direction) and all other factors stay the same, what will be the new level of service?
If the 50-kg crate starts from rest and travels a distance of 6m up the palne in 4s, determine the magnitude of force P acting on the crate. The coefficient of kinetic friction between the crate and the ground is \mu_k=.25
A hawk flying at 2 m/s at an altitude of 45 m accidentally drops its prey. The parabolic trajectory of the falling prey is described by the equation below until it hits the ground, where y is its height above the ground and x is its horizontal dis..
Design a series of closely spaced parallel box beams that will support an asphalt road surface over a 10 foot wide, 40 foot long span. The hollow box beams are made of concurred and imbedded No. 8 steel rods (1 inch dia.).
At a certain location on the surface of an engineering component, the material is in a state of plane stress with principal stresses of fmax = 150 MPa and fmin = 50 MPa (both tensile). If the yield strength of the material is Y = 350 MPa
The US EPA has published the following data for the release to the Florida environment of sulfuric acid (H2SO4 ), the most widely used industrial chemical (in millions of pounds).
Steam enters a turbine with neglible velocity at 4 mpa, 600 degrees celcius and a flow rate of 36000 kg/h. Determine the heat loss from the steam passing through the turbine if the turbine has a power output of 20000 kw
A particle is traveling along a circular curve having a radius of 13 m. If it has an initial speed of 21m/s and then begins to decrease its speed at the rate of at = (-0.25s)m/s2
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