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A toll bridge carries 5000 vehicles per day when the toll is $1.50/vehicle. It is estimated that when the toll is increased by 25 cents, the traffic on the bridge will decline by 10% of the current volume. What is the toll that should be charged if it is desired to maximize the amount of money collected from motorists? I was able to figure out the equation for volume in terms of cost but wasn't able to figure out the cost equation in terms of volume.
Determine the diameter of glass tubing that is necessary for the capillary rise to be less than 0.5 mm. Assume the fluid is water with surface tension equal to 0.0728 N/m and specific weight equal to 9800 N/m3
A circular hatch, 2-m in diameter has its top 10-feet under water ( fresh water s.g. = 1.0), and is hinged on the bottom, and held closed on the top with a single bolt. Perform a moment balance about the hinge to calculate the force that the bolt mus..
A conventional water treatment plant treats 2.40m^3*s^-1 of river water. The filters in the plant are 8.0x8.0m surface area and operate on the following schedule. A filter is cleaned once in each 24-hr period
Incinerators can be a source of hazardous emissions into the atmosphere. Stack gas samples were collected from a sample of 50 incinerators in Chicago. Of the 50 samples
The beam has a rectangular section which is to be singly reinforced. Given pt=1.1% design and detail the steel reinforcement for the section where the moment is maximum
An overflow spillway 1,600 feet long is designed to pass 120,000 ft3/s of water. A 1:20 scale model of the cross section of the structure is built in the laboratory. It is assumed that the flow is two dimensional so only a 1-foot section
A loose, uncompacted sand fill 6 ft in depth has a relative density of 40%. Laboratory tests indicated that the minimum void ratios of the sand are 0.46 and 0.90, respectively. The specific gravity of solids of the sand is 2.65.
Truck B has an 8000-lb single axle and a 43,000-lb tandem axle. On a flexible pavement with a 3-inch hot-mix asphalt (HMA) wearing surface, a 6-inch soil-cement base, and an 8-inch crushed stone subbase, which truck will cause more pavement damage
How does aggregate size influence the coefficient of permeability of concrete? List other factors that determine the permeability of concrete in a structure.
A race car C is being tracked via telemetry. The on-board acclerometer records and acceleration level of -.7get+.5gen. If you know that the v at this instant is 200km/hr, what is the tracks radius of curvature at this instant
The column bearing is 12 in. measured along the beam, and the bearing plates at the end supports are each 8 in. Investigate this beam of A992 steel for (a) flexure, (b) shear, and (c) satisfactory transmission of the reactions load
A glass jar is heated in an oven and sealed when the air pressure is 103 kPa and the temperature is 105 C. Find the absolute, gage, and vacuum pressures in the jar when it cools to 20 C.
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