Refers to the electronically lop-sided condition of a molecule that has one half more negative than the other half. A state or condition of having poles or possessing parts or regions of opposite or contrasting effects. Polar (hydrophobic) and apolor (hydrophilic) portions of a molecule may be present on a surfactant or a pesticide.
1) The condition of being positive or negative with respect to some reference point or object. 2) The direction of flow of electricity either negative to positive or positive to negative. Matching polarity between different amplifiers can greatly reduce hum and the risk of elictrical shock. Most amps come equipped with a 'polarity switch'.
Found on http://www.encyclo.co.uk/local/20447
(from the article `geomagnetic field`) ...a magnet aligned with the planet`s rotation axis. The figure shows such a field for a bar magnet located at the centre of a sphere. If the sphere ... [2 related articles] Found on http://www.britannica.com/eb/a-z/p/86