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If the interfacial tension between air-mercury interface in a capillary tube is 480 dynes/cm and the contact angle through the mercury is 140, what would be the capillary pressure between oil and water if the capillary pressure between air-mercury is -15 psia? Assume that the interfacial tension between oil-water is 22 dynes/cm and the contact angle through water is 93
To protect the channel from erosion, the normal flow velocity for the design discharge has to be reduced to 7.0 fps or below, and the flow Froude number must be reduced to 0.80 or below.
You are the Chief Engineer for a prominent hydraulics consulting company. Your client wants to pay you lots of money to design a system to deliver 1 m3/s from reservoir A at elevation 300 m to reservoir B at 500 m.
A 12in diameter water main in your city has become very rough due to rust and corrosion, it has been suggested that the flowrate through the this pipe can be increased by inserting a smooth plastic liner into the pipe.
A w14X74 of A992 Steel has a length of 20 feet and fixed ends. Compute the design compressive strength for LRFD and the allowable compressive strength for ASD.
A 1.2-in. rainfall occurs in a 6-hour duration. If this represents an exceedence probability of 10%, what is the probability it will be equaled or exceeded at least once in the next 3 years. What is the probability it will be equaled or exceeded e..
A 1 m diameter mass, M is connected to a 2 m wide rectangular gate. The gar is to open when the water level ,h, drops below 2.5 m. Determine the required value for M.
What is the maximum length of trench that can be excavated by hand economically rather than by a trenching machine. It will cost $900.00 to transport a trenching machine to the job and back to the storage yard.
The average flow rate of the River Tiger into the lake was determined to be 3.5 m3/s and the average flow rate of the River Yankee out of the lake was measured at 2.5 m3/s (ignore any loses due to evapotranspiration).
The suitcase has a mass of 15kg, and a constant friction of 15N opposes the motion. She starts with an initial speed of 0 and moves the suitcase a distance of 20m. Find the speed of the suitcase at the end of the path.
Equation for head loss in a pipe when it is laminar flow: head loss, h= (32*dynamic viscosity,u*pipe length,L*average velocity of fluid,V) / (gravitational acceleration,g*pipe diameter,D^2) Give an equation for relative uncertainty of head loss
If the channel is overtopped for 2 years in a row, renovation cost will increase too much. What is the probability that the channel will be overtopped for only 2 years in a row in a 4 year period
At a section in a beam the tensile stress due to bending is 70 N/mm2 and there is a shear stress of 25 N/mm2. Determine from first principles, the magnitude and direction of the principal stresses
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