To be fair to long time puzzle followers,sTEm-at-Work Puzzle 36does violate the rules for sTEm-at-work puzzles. The solution to the puzzle is supposed to be provided in the combined information presented in the puzzle text and the puzzle plot(s). For puzzle 36, the reader needed to also know that when pressure is applied to a fluid the fluid demonstrates a capacitive like effect. The magnitude of that “RC” effect depends on the properties of the fluid, and when necessary, can be reduced but not eliminated. This valve does leak, but the “RC” rounding of the edges of the square wave shape is not because the valve leaks. The rounding is because of the capacitive effect of the hydraulic fluid. This is the reason for the suggestion in last month’s answer text that sTEm-at-Work puzzle 36represents a great segway for lessons on related RC time constant concepts including the material properties and mathematics that generate and predict an RC response, respectively. Since a material’s “RC” type response to an applied forcing function like pressure, or voltage is so common, taking the time to have students explore the concept in as much detail as can be assimilated is good use of instructional time.
The Tech rejected the actuator because the test results shown below were not the same shape as the applied pressure test pattern shown above. NO
The State of Florida has the third largest population in country, with an official 2010 estimate of 19 million persons and approximately 50% of the population is in the civilian labor force (9,000,000).
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FLATE’s administrative core is a partnership between St.Petersburg College, the College of Engineering at the University of South Florida and Hillsborough Community College. The Center is housed at Hillsborough Community College on its Brandon Campus under the leadership of Campus President, Dr. Nancee Sorenson. It occupies 1500 square feet of office space and shares the laboratory resources of the manufacturing /engineering technology program.
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