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A catheter is a specialised needle intended for long-term insertion into a vein in a patient's arm. Engineers are redesigning them to cause less discomfort and damage. An intravenous chemotherapy system is based on a new catheter design. A liquid drug flows to the patient from a plastic bag via through a smooth plastic tube. The liquid drug completely fills the tube at the start of the procedure. The bag is at atmospheric pressure and it is 0.75 m vertically above the catheter. The tube is 2 mm in diameter and 2.0 m long. The average blood pressure in the vein is 6500 Pa gauge. The density of the liquid drug being supplied is 1020.4 kg/m3 and its dynamic viscosity is 2 x 10-3 Pa.s. Exactly 314 mL of the drug must be supplied. In a laboratory experiment, you measured a fitting head loss for the catheter equivalent to 0.068 m of the liquid drug.
(a) What is the key assumption you must make to do this problem?
(b) How long will it take to supply the required amount of drug?
(c) Show by calculation that the key assumption you made was correct.
The beam species is douglas fir-larch a) check for beam shear b) check the beam for deflection, knowing deflection limitation is L/360 (given L =12 ft) Given: L=12 Beam Size 9.50" x 10.50" fv= 1.50V/A Deflection Max = 19PL^3/384*E*I
The ship has a total weight of 155,000 tons, length = 1,600 feet and a beam = 150 feet (assume that it is the shape of a rectangular box). Calculate the height above the waterline of its center of Gravity (G).
THe upper end of the spring is welded to the lunger and the lower end is welded to the base plate. If the plunger is lifted 1.5" above equilibrium and released from rest, calculate its velocity as it strikes A.
A soil sample was taken from a proposed cut area in a highway construction project and sent to a soils laboratory for a compaction test, using the Standard Proctor compaction procedure. Results of the test are as follows:
Estimate daily evaporation from a lake (cm/day) using Penman's (combined) formula, given the following information: average air temperature is 28 oC, average water temperature is 15 oC, average wind speed at 8m height is 20 Km/hr
A tangent section of highway has a -1.0% grade and ends at station 0+1450and elevation 25m. It must be connected to another section of highway that has a -1% grade and that begins at station 1+345 and elevation 40m.
The casting has a mass of 3Mg. Suspended in a vertical position and initially at rest, it ia given an upward speed of 200mm/s in o.s^s using a crane hook H. Determine the tension in cables AC and AB during this time interval if acceleration is con..
A drilling engineer wishes to support pipes of length L on blocks so that the magnitude of the bending moment in the pipes directly over the supports is equal to the magnitude of the bending moment at the center of the pipes.
In addition to performing the cut-and-fill operations, the contractor needs to excavate the entire building footprint to a depth of 8 feet for a basement construction made of concrete masonry perimeter walls supported by 2'-0" X 0'-10" continuous ..
Is the system within membrane manufacturer's warranty requirement of maximum flux rate of 14 gfd? What is the annual power cost of the RO system?
Water flows i a 8-m-wide rectangular channel that has longitudinal slope of .0001. The channel has an equivalent sand roughness of 2mm. Calculate the uniform flow depth in the channel when the flow rate is 15m^3/s. Use the Darcey-Weisbach equation..
The volume of water in a reservoir is often expressed using the unit of acre-foot. A volume of 1 acre-foot is the amount of water covering an area of 1 acre to a depth of 1 foot. Lake Mead is the largest man-made lake in the United States.
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