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For the free-falling patachutist with linear drag, assume a firstjumper is 70 kg and has a drag coefficient of of 12 kg/s. If a second jumper has a dragcoefficient of 15 kg/s and a mass of 75 kg, how long will it take him to reach the same velocity the first jumperreached in 10s?
First solve for the velocity of jumper 1 after 10s: V1 =________________________
(show work here)
Next solve for the time (t2) jumper 2 needs to to reach v1: t2 =________________________
The drinking water needs of an office are met by large water bottles. One end of a .25 in diameter plastic hose is inserted into the bottle placed on a high stand, while the other end with an on/off valve is maintained 2 ft below th bottom of the ..
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 each step.
When in use, a fishing rod can be approximated to act as a cantilevered beam. Assume that the force (P) is applied to the end of the beam by a fish while the fisherman rigidly holds the other end of the beam.
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The shape below has a cut along the entire length of the member thus making it an open section. The uniform thickness is 0.125in. Determine the maximum shear stress for the shape. Compare the stress for this open shape to a shape without a cut.
The platform itself weights 30 kN in air, and each cylinder weighs 1.0 kN per meter of length. What total cylinder length L is required for the platform to float 1 m above the water surface
Find the point load strength index in the two directions and compute the point load strength anisotropy index 1,(s0)
The evaporation rate from the surface of a 3650-acre lake is 100 acre-ft/day. Estimate the depth change in the lake in feet during a 1-year period if the net inflow to the lake is 25 cfs. Is the depth increasing or decreasing
Giving the classes, explain how rocks are put intofive (5) classes by each of the above parameters. Alsogive the parameter rating in each of the fiveclasses. Hint; use a table to answer this question
A compaction test was conducted in a soils laboratory, and the standard proctor compaction procedure (ASTM D698) was used. The weight of a compacted soil specimen plus mold was determined to be 3815 g.
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