Depending on the size and method, defrosting a refrigerator or freezer can take anywhere from 10 minutes to a day. The most common method is to unplug the refrigerator or freezer, prop the door open and allow the ice to melt on its own. However, this method may take up to a day to defrost the appliance completely.
Circle is the locus of points equidistant from a given point, the center of the circle. The common distance from the center of the circle to its points is called radius. Thus a circle is completely defined by its center (O) and radius (R): C(O, R) = O(R) = {x: dist(O, x) = R}.
sphere. great circle - Any circle on the surface of a sphere that lies on a plane through its center, or a circle that divides into two equal partsâas the Equator. quadrant - A quarter of a circle or sphere. rhumb line - A line on a sphere that cuts all meridians at the same angle; the path taken by a ship or plane that maintains a constant compass direction. diameter - From Greek, meaning measure through (a circle or sphere, etc.). Sphere the persons with whom one is normally in contact, 1839; a group of persons of a certain rank, standing, or interest, 1601.