BIEN 210 Lecture Notes - Lecture 10: Reynolds Number, Electric Potential, Viscosity
12 Aug 2018
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: butter y wings = layers of micro/nano structures and depending on material and distance between structures it will create an interference pattern of light and we end up with di erent re ection/refraction. Piezoelectricity & piezoresistivity: piezo = pressure, piezoelectric materials exhibit internal generation of electrical charge resulting from an applied mechanical force. Reynold"s number: a dimensionless number that helps us predict ow patterns, and indicates whether the uidic system is dominated by inertial or viscous forces. Capillary action: occurs due to forces of cohesion (attractions within the molecules of a liquid) and adhesion (attractions between the molecules of the liquid and the surface). These become a lot stronger because of close distance between everything: contact angle is between surface and pipe. Wednesday, march 28, 2018: e. g. uptake of water by roots, ow of tears from ducts, e. g. surface tension = alveoli of lungs, surface tension prevents the collapse of our lungs when we exhale.
