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A solid one-way slab is to be used for a framing system similar to that shown. Column spacing is 33 ft, with regularly spaced beams occurring at 11 ft center to center. Superimposed dead load on the structure is 50 psf and the live load is 75 psf. Use fc'= 4ksi and fy'= 60 ksi. Determine the thickness for the slab and select the size and spacing for the bars.
The zebra mussels have a net growth rate of 0.09 yr-1. At the current time there are 176 zebra mussels in the stream. What is the predicted number of zebra mussels 5, 10, and 20 years from now
To achive a specific level of disinfection a water treatment plant operator determines the" Ct" value 180mg min/l is necessary with units for disinfectant concentration C in mg/l and disinfectant contact time t in minutes
A 3000-lb car has a maximum speed (at sea level and on a level, paved surface) of 140 mi/h with 16-inch-radius wheels, a gear reduction of 3.5 to 1, and a drivetrain efficiency of 92%. It is known that at the car's top speed the engine is producin..
A simply supported span of 28 feet must carry a uniform loading that produces a total factored maximum moment of 300 K-ft including the beam weight. The concrete can be 3.5 ksi and the steel is grade 60.
jar tests were perfomed on untreated river water. an optimum dose of 12.5 mg/L of alum was determined. determine the amount of natural alkalinity (mg/L as CaCO3) consumed.
What is the maximum safe speed around the curve? If the speed limit on the roadway is 60mph, what action should be taken by the engineer?
Consider the air over a city to be a box 100km on a side that reaches up to an altitude of 1.0 km. The air is blowing into the box along one of its sides with a speed of 4 m/s
the hull of a boat has a volme of 150m and the total mass of the boat when empty is 8560kg. determine how much load this boat can carry without sinking in a lake.
A state legislator wishes to survey residents of her district tosee what proportion of the electorate is aware of her position on using state funds to pay for abortions. a)What sample size is necessary if the 95% Confident Interval
For a multi-file project that contains just one class, list and describe each of the files that would be required to implement and test the functions of the class.
An energy efficiency project has a first cost of $300,000, a life of 10 years, and no salvage value. Assume that the interest rate is 9%. The most likely value for annual savings is $60,000.
Friction on the concrete surface creates a couple moment of 100 Mm on the blades of the trowel. Determines the magnitude of the resultant couple forces so that the resultant couple on the trowel is zero.
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