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Assume that a gallon of gas contains 114,000 BTUs of energy and that a brilliant engineer has created an 80 percent efficient solar cell. Find the area (in square smoots and in square feet) that an
They each completely penetrate a homogeneous, confined aquifer, and pump at exactly the same rate, 5m^3/day. Prior to pumping, the piezometric head was 30m, the same as the thickness of the aquifer.
Using the tables in the AISC manual, make a preliminary selection of member size, using a HSS shape. Do not simple state a choice - state your logic step by step, quoting page numbers (AISC) for eac
Extend the editing of vehicles to allow editing of the weight (importance) of a sensor in determining the motion of the vehicle.
A PVC pipe has an inside diameter of 40 mm, is 30 m long and carries 10°C water at a rate of 3.5 m3/hr. At this rate, the friction factor of the pipe is 0.0814.
a .65% Carbon hypoeutectoid plain carbon steel is slowly cooled from 950 degrees C to just slighty above 723 degrees C calculate the weight percent austenite and weight proeutectoid ferrite in this
Assume the section has cracked and use the transformed area method to compute their flexural stresses for the load. Given: Beam 30 ft long with uniform load of 2 k/ft and a point load of 30 k at 10
John Adams has a $65,000 adjustable gross income from Apple Corp. and allowable itemized deductions of $7200. Mary Eve has a $75,000 adjustable gross income and $2000 of allowable itemized deduction
a mild steel component in a form of a finite slab with a thickness of 2L=2.5 mm is to be hardened by packing it in a carbonaceous material in a furnace for a predetermined time. the uniform initial
The divers work at a depth of 15 m and the seawater density is 1027 kg m-3. They are known to consume 130 litres of air at the ambient temperature is 10oC over the time taken to do the job.
A tank with a volume of 5,000 gal contains salt solution at an initial concentration (C0*) of 70,000 mg/L, but the concentration in the tank (C) needs to be reduced to 500 mg/L. Two approaches are b
A brief summary comparing the rule-based and preprocessor-based approaches used in Homework Assignments #2 and #3, with an emphasis on identifying any strengths or weaknesses associated with each ap
The viscosity of a fluid can be measured in an experiment by dropping a small ball into a calibrated tube containing the fluid and observing the random variable X, the time it takes for the ball to
The compressive strength of concrete has a (population) mean of 2500 psi and a (population) standard deviation of 50 psi. Find the probability that a random sample of n= 5 specimens will have a samp
Determine the dimensions of the best hydraulic trapezoidal concrete channel section to convey water at a rate of 2200 gal per min on a channel slope of 0.015 m/m.
Nitrogen is compressed from 80 kPa and 27?C to 480 kPa by a 10-kW compressor. Determine the mass flow rate of nitrogen through the compressor, assuming the compression process to be (a) isentropic
Determine the discharge of a trapezoidal concrete channel section with a bottom width of 4 ft and side slopes of 2:1. The depth of flow is 5 ft and the channel slope is 0.5%
Assume that a new method allows her to sort 20 rings/min but costs $500 to implement. Is it worth implementing the new method for a batch of 50,000 rings. At what point does the new method pay off.
A wastewater treatment plant produces 34, 500 pounds of secondary sludge each day. Wastewater flows into the plant at a rate of 5.6 MGD and has an influent BOD of 325 mg/L. How many pounds of BOD ar
In Chlorine disinfection (3-log reduction in Giardia- Cysts), determine the water pH for a contact time of 90 minutes using a chlorine concentration of 2 mg/L at 20 degrees C
The absolute viscosity and density of water are 1.4X10^-3 Pa-s and 998 kg/m^3, respectively. For a head loss of 0.1 m, determine the filtration rate (m/d) if the depth of this layer of sane is 0.1m
A water treatment plant is processing water at s flow rate of 0.26m^3/s. The hydraulic detention times for the rapid mix tank, flocculation basin and the rectangular sedimentation basin are 10 sec,
Consider again the proposed water treatment plant for a city of 100,000 people where the maximum daily water usage rate is 99 X 106 L/d. Determine (a) the number of kilograms of chlorine needed per
Assuming a density of 120/ft^3 for masonry brick work, determine the max height of a brick wall if the allowable compressive stress is limited to 150/in^2 and the brick is a) 4" wide b) 6" wide.
The settling velocity of alum floc in a sedimentation basin is approximately 0.0014 fps. Calculate the equivalent overflow rate in gpd/ft2. What is the minimum detention time in hours to settle out