11–124 Water at 108C flows over a 1.1-m-long flat plate with a velocity of 0.55 m/s. If the width of the plate is Document Preview:
Questions – Mechanical Eng – Fluid Mechanics – Class Homework assignment – set 124 Problem 11-124
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11–125 Water at 108C flows over a 3.75-m-long flat plate with a velocity of 1.15 m/s. If the width of the plate is 6.5 m, calculate the average friction coefficient over the entire plate. (Water properties at 108C are: r 5 999.7 kg/m3, m 5 1.307 3 1023 kg/m·s.) (a) 0.00508 (b) 0.00447 (c) 0.00302 (d ) 0.00367 Document Preview:
Questions – Mechanical Eng – Fluid Mechanics – Class Homework assignment – set 125 Problem 11-125
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11–123 The turbulent boundary layer can be considered to consist of four regions. Which choice is not one of them? Document Preview:
Questions – Mechanical Eng – Fluid Mechanics – Class Homework assignment – set 123 Problem 11-123
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11–122 The region of flow trailing the body where the effects of the body are felt is called (a) Wake (b) Separated region (c) Document Preview:
Questions – Mechanical Eng – Fluid Mechanics – Class Homework assignment – set 122 Problem 11-122
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11–120 A person is driving his motorcycle at a speed of 110 km/h in air at 208C. The frontal area of the motorcycle Document Preview:
Questions – Mechanical Eng – Fluid Mechanics – Class Homework assignment – set 120 Problem 11-120
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11) What is the best way to cleanup a small nanoparticle spill on the floor? a) Swiping b) Wet towel cleaning c) Washing with water d) Dusting and vacuuming 12) What should be the daily routine practice to prevent the cross contamination of laboratories? a) Removing glows when left the room b) Changing the lab coat for each lab c) Washing hands d) All of above
11.Supplier-buyer relationships are categorized into A.Four categories B.Five categories C.Seven categories D.Eight categories 12. Industries such as agriculture, fisheries, construction and transportation, together up the A. organization market B.large markets C.large buying D.business market 13. Companies shift ordering responsibility to specific supplier?s in managing systems are classified as A. vendor managed inventory B.replenishment programs C.continuous programs D.inventory management 14.People having authority to prevent information to reach deciders and approvers are classified as A.approvers B.gatekeepers C.evaluators D.initiators 15. Companies join together to gain more discounts on volume purchases are classified as A.barter alliances B.buying markets C.buying alliances D.private exchanges
12. Which of the following is most likely to occurif the Federal Reserve engages in open market operations to reduce inflation? (A) A decrease in interest rates B) A decrease in reserves in the banking system C) A decrease in the govemment deficit D) An increase in the money supply increase in exports pon
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11. Modern Computer are very reliable but they are not a. Fast b. Powerful c. Infallible d. Cheap 12. What is the name of the display feature that highlights are of the screen which requires operator attention? a. Pixel b. Reverse video c. Touch screen d. Cursor 13. IMB launched its first personal computer called IBM-PC in 1981. It had chips from Intel, disk drives from Tandon, operating system from Microsoft, the printer from Epson and the application software from everywhere. Can you name the country which contributed the video display? a. India b. China c. Germany d. Taiwan 14. Personal computers use a number of chips mounted on a main circuit board. What is the common name for such boards? a. Daughter board b. Motherboard c. Father board d. Breadboard 15. In most IBM PCs, the CPU, the device drives, memory expansion slots and active components are mounted on a single board. What is the name of this board? a. Motherboard b. Breadboard c. Daughter board d. Grandmother board
12. What is the most common magnetic nanoparticle oxide compound family? What are the variants, and why is it used more commonly than other compounds? 13. Is diffusion of solutes in nano-channels the same as in bulk solvent? Give two mechanisms that can be expected to modify the diffusion coefficient. 14. Can the chemical properties of materials change at the nanoscale? Give an example, and a plausible cause for such a change.
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