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Rigid members ABC and DEF are joined with steel links BE and CF using 25mm pins. The links are made of 25mm thick 50mm wide plates and are single shear. Determine the maximum normal stress in each o
Water flows in a 100-m long pipe at 3 m/s. If the water temperature is 20 degrees C, determine the minimum valve-closure time to avoid creating the water-hammer pressures. What is the maximum water-
5 Kg of water at 1.2 MPa, 120oC is contained in a frictionless piston-cylinder device. The water is heated until its temperature reaches 250oC. a) a)Determine the work performed in kJ
Determine the ASD reference and adjusted design values for the following members and loading conditions. All members are Select Structural Southern Pine and are fully braced to prevent lateral torsi
a spot speed study was conducted on a freeway on which the mean speed and the standard deviation were found to be 72 .4 mi/hr and 5.4 mi/hr, respectively. what is the range of the values that would
The operating cost will be $10,000 per quarter with a salvage value of $25,000 after its 2-year life. Process B will have a first cost of $250,000, an operating cost of $15,000 per quarter and a $40
The number of hours on each machine required to produce a product is given in the following table, along with the number of hours available per week on each type of machine. Assume that the company
A coal-fired power plant produces a net electrical output of 500 MW. The composition of the coal burned is C= 72 %, H= 6 %, S= 3.5 %, O= 6 %, N= 1 %, and ash= 12 % by weight. It's heating value (HV)
The total phosphate concentration (TOTPO4) in a river is 3.2 mg/L as P. The pH of the river is 7.8. What are the concentrations of H2PO4- and HPO42-
Using a design speed of 50 mi/h, determine the stations and elevations of PVCs, PVIs, and PVTs of the two vertical curves required to connect the highway segments, as well as the length of the const
The rate constant for decay of contaminant A in the reservoir is k=1.5 (1/year). Assuming the population, discharge rate, and reservoir conditions have been stable for a long time, estimate the conc
You are the winner of a sweepstakes and given a choice of a one-time payment of $1,000,000 or a guaranteed $80,000 per year for 20 years. Assume that you will collect all 20 years regardless of heal
A ballon is tethered at a height of 16.8 m above the ground by three cables. if the tension in highlighted cable is 60 N , determine the vertical force exerted by the balloon at the base of the ball
Given a sand with a moisture content of 10%, how much water needs to be added to bring the sand to a moisture content of 20%
A barge has the trapeziodal shape and is 22 m long into the paper. If the total weight of barge and cargo is 350 tons, what is the draft H of the barge when floating in sea water
CPM Construction plans to buy a truck for $150,000 and sell it for $15,000 at the end of 5 years. The annual operating cost of the vehicle is $60,000. What is the present value of the truck
Describe the basic principle of differential GNSS positioning and the difference between real time differential GNSS and post processed differential GNSS.
design a horizontal curve with a 40-degree central angle ( delta = 40) for a two-lane road with 11-ft lanes. The design speed is 70 mi/h and superelevation is limited to 0.06 ft/ft. Give the radius,
A flow has circular streamlines. At t=0 the flow is in the clockwise direction and the angular velocity is pi rad/s. This flow exists for 1 s, and then reverses to counterclockwise with an angular v
A 10cm diameter vertical tank holds 20cm of water topped with 15cm of ethyl alcohol. The cylinder is rotated about its central axis at a rotation rate of 20 rad/s. (a) What will be the shape of the
Air pollution in a city is caused by the following four sources: vehicle exhaust (V), industrial exhaust (I), dust (D), and pollen from plants and trees (T). On a particular day, the likelihood of a
A sample of soil was compacted into a 945 ml.laboratory mold. The mass of the compacted soil was 1850 grams and its moisture content was 13.1%. Specific gravity of solids is 2.70, Compute the moist
Design a horizontal curve with a 40-degree central angle (delta=40) for a two-lane road with 11-ft lanes. The design speed is 70 mi/h and superelevation is limited to 0.06ft/ft. Give radius, degree