15. Two circles of radii 17 cm and 25 cm intersect each other at two points A and B. If the length
of common chord AB of the circles be 30 cm, find the distance between the centren of
circles.
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In meteorology, precipitation is any product of the condensation of atmospheric vapor of water that falls under gravitational pull from clouds.[2] The main forms of precipitation include drizzling, rain, sleet, snow, ice pellets, graupel and hail. Precipitation occurs when a portion of the atmosphere becomes saturated with water vapor (reaching 100% relative humidity), so that the water condenses and "precipitates" or falls. Thus, fog and mist are not precipitation but colloids, because the water vapor does not condense sufficiently to precipitate. Two processes, possibly acting together, can lead to air becoming saturated: cooling the air or adding water vapor to the air. Precipitation forms as smaller droplets coalesce via collision with other rain drops or ice crystals within a cloud. Short, intense periods of rain in scattered locations are called showers.