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Fluid Flow Exponential Decay. Experiment 4 was the study of exponential decay and how closely a fluid flow follwed the half-life trend. The experiment was carried out by filling a tall cylinder with water to a known height. The water is then allowed to flow out of a small capillary tube at the bottom. The first part of the experiment tested how the height of the water column affected the pressure exerted by air on the water, which in turn affected the rate of the water flow, the height of the water was kept constant for each event. By comparing the amount of time needed to collect roughly 100ml of water at varying heights of water, it was found that the higher the column of water the faster the rate of water flows. This is explained by the equation [pressure] = [density of water] x [acceleration due to gravity] x [height...

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