Oil spill cleanup costs for a nation or region can be estimated by taking the average cost for the specified region and multiplying it by various “modification factors” that are a function of oil type (light crude, heavy crude, No. 4 fuel, etc.), spill size (< 34 tons, 34–340 tons, etc.), location type (offshore, nearshore, in-port), cleanup method (dispersants, burning, manual), and extent of shoreline oiling (0–1 km, 2–5 km, etc.). For an average cost of $23.3 per liter and modifiers for a region in the United States of 1.35, 0.65, 1.28, 0.25, and 1.36 for oil type, spill size, location type, cleanup method, and extent of shoreline oiling, respectively, determine the estimated cleanup cost per liter of an oil spill in the region of the United States. The cleanup cost per liter of an oil spill in the region of the United States is estimated to be $
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Aheavily insulated piston-cylinder device contains 0.02 m3 of steam at 300 kpa and 200 °c. 1.2 mpa. d this process. team is now compressed in a reversible manner to a pressure of etermine the entropy change and the work done on the steam during this process

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?

A)-in the process of engineering design, explain the contribution of material selection. b)- explain the procedure of synthesis as is employed in engineering design. c)- is there any relationship between ergonomics and engineering design? explain. d)- safety consideration in engineering design includes human, product and the enviroment . explain how safety will be incorporated into the design?