Wind power is both old and new. From the sailing ships of the ancient Greeks, to the grain mills of pre-industrial Holland, to the latest high-tech wind turbines rising over the Minnesota prairie, humans have used the power of the wind for millennia.
piloerection (goosebumps), the physical part of frisson. Frisson (French for 'shiver') is a sensation somewhat like shivering, usually caused by stimuli other than cold. It is typically expressed as an overwhelming emotional response combined with piloerection (goosebumps). Stimuli that produce a response are specific to the individual.
Poisson's ratio (letter v) is a measure of the contraction that happens when an object is stretched.or example, if a block is being stretched as shown in the image to the right, the equation for the poisson's ratio will be: Poisson's ratio ranges from 0.0-0.5 for common materials, though for materials with certain structures, can be as low as -1.