BIO-240 FA5 Lecture Notes - Lecture 14: Sewage Sludge, Radioactive Waste, Centripetal Force
2 Apr 2017
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Document Summary
Tides are the sea rising and lowering. Early technology: observing water moving up/down on a stick. Tides can work alongside waves as water moves. Newton gave us an equation for gravity: every object that has mass in the universe is attracted to every other object. Ff = (g x m1 x m2) / r2. M1, m2 = mass of object 1 and 2. R2 = distance between object 1 and 2 sequared. Zenith: closest distance between the reference object and the three-dimensional main object. Resultant force: mathematical difference between centripetal force and gravitational attraction. Two lunar bulges at the nadir and zenith. Earth"s rotation pulls shorelines in and out of bulges: flood (incoming) and ebb (outgoing) tides. Diurnal one high tide and one low tide. Mixed/mixed semidiurnal - odd number of tides. Direct harm: oil clogs pores, block skin needed for breathing, makes feathers unable to separate, and cause local spikes in microbes that feed on hydrocarbons.
