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Viscosity is a measure of a fluid's fee-dependent resistance to a change in shape or to motion of its neighboring portions relative to one another. For liquids, it corresponds to the informal concept of thickness; for instance, syrup has a better viscosity than water. Viscosity is outlined scientifically as a drive multiplied by a time divided by an space. Thus its SI models are newton-seconds per metre squared, or pascal-seconds. Viscosity quantifies the interior frictional force between adjacent layers of fluid which are in relative motion. For instance, when a viscous fluid is forced via a tube, it flows more quickly close to the tube's center line than near its partitions. Experiments present that some stress (reminiscent of a pressure difference between the 2 ends of the tube) is required to sustain the move. This is because a force is required to beat the friction between the layers of the fluid that are in relative motion. For a tube with a continuing price of movement, the energy of the compensating pressure is proportional to the fluid's viscosity.
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