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From an aerial photograph, one observes that on a level section of a (multilane) highway, 25% of the vehicles are trucks, 75% are cars, and there are 50 vehicles per mile of highway. The trucks travel at 40 mph and the cars at 60 mph. This highway also has a section with a steep grade on which the speed of the trucks drops to 25 mph and the speed of the cars to 55 mph. No vehicles enter or exit the subject highway sections (except at the ends). The flows on these highwaysections are stationary, which means that the flows on the level section are equal to those on the grade. Determine (a) the flow of vehicles on the level section; (b) the density of vehicles on the grade; (c) the percent of trucks on the grade as seen from an aerial photo; (d) the percent of trucks as seen by a stationary observer on the grade.
Design a simply supported one-way reinforced concrete floor slab to span 10 ft and carry a service live load of 175 psf and a service dead load of 25 psf. Use fc' = 3000 psi and fy = 60,000 psi. Make the slab thickness to ½-in. increments.
What is the definition of a customer? What are some examples of internal and external customers? Is the measurement of customer satisfaction different for internal customers than for external customers?
given: Vf=Vi + a t and Sf=Si + Vi t + 1/2 a t Cedar points millennium force accelerates from 10 mph to 93 mph in 4.5 seconds. assuming acceleration is constant, find acceleration in ft/sec^2 and distance traveled in meters
On a 20 ft cantilever beam, Load W1=200 or W2=500 or both may be applied at the midpoint B or at the end of the beam C. The bending moment induced at th fixed support A, MA, will depend on the magnitude of the loads at B and C.
How many short tons of coal are required by this plant per year, assuming it operates continuously? If 10% of the coal mass remains as residual ash, how many tons will develop in the ash pile over 25 years?
The driver strikes the sign at a speed of 25 mi/h. If the student was traveling at 55 mi/h when the sign was spotted, what was the drivers associated reaction time in seconds
The atomic radius for iron has been measured to be 0.1241 nm. Determine the interplanar spacings for the (111) and (211) sets of planes
Consider an L-shaped breakwater that protects a small harbor dredged to a uniform depth of 6 m. For a 2 m high, 10 s period incident wave at the head of the breakwater having incident wave direction of 60 degrees
Determine the air pressure at the top of a 300 m high building by assuming the density of air stays constant at the z = 0 value. Now compute the pressure assuming the density of the air varies. Is there a significant difference.
What is the concentration of tracer in the reactor 1 h after tracer addition is terminated? The reactor had an initial concentration of tracer of 1.0 mg/L when tracer addition commenced.
given that E for the tube material is 70 GN/m2 and the stool legs are 75cm long, how much will each leg shorten under the applied compressive load (take g = 9.8m/s2)
A corporation issues a new 10 year bond that has a coupon rate of 4.65% with quarterly dividend payments. Alex purchases 200 of these bonds at a price of $98.75, for a total investment of $19,750. Assuming he holds them to maturity, what will be h..
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