A refrigerant is a compound used in a heat cycle that undergoes a phase change from a gas to a liquid and back. The two main uses of refrigerants are refrigerators/freezers and air conditioners (cf. coolant). Since it was discovered in the 1980s that the most widely used refrigerants were major causes of ozone depletion, a worldwide phaseout of ozone-depleting refrigerants has been undertaken. These are being replaced with "ozone-friendly" refrigerants.
Nine holes
Nine holes is a two-player abstract strategy game from different parts of the world and is centuries old. It was very popular in Englan...
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Nureongi (누렁이) and Hwangu (황구; 黃狗) are Korean terms meaning "Yellow Dog" used to refer to tannish mongrel or landrace of dog in... -
Three portions of the post-creole continuum : acrolect ( linguistics ) The variety of speech that is considered the standard form. m...
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