His previous work went on hold as he developed more and more elaborate ways to measure the movement of the fluid, culminating in a series of experiments in which the tip of an aluminum rod, dropped from above, slammed into about 7 gallons of cornstarch and water. An accelerometer in the rod told Waitukaitis how fast it was accelerating and decelerating, which, when coupled with the rod's mass, let him calculate the force the fluid was exerting when hit. After developing a mathematical model that incorporated all of these measurements and a few other parameters about the fluid, including the concentration of cornstarch grains, Waitukaitis and Jaeger developed a whole new theory to explain the stepping-stone phenomenon. In addition to providing an explanation for what happens when the fluid is struck, Waitukaitis and Jaeger have confirmed an intriguing phenomenon that does have practical implications - but only for cornstarch pool partiers.
Source: TIME
Link: http://morene.ws/Iml2E3
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