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A standard men's basketball weighs between 20 and 22 ounces, and a standard women's basketball weighs between 18 and 20 ounces. Smaller basketballs used by young children can weigh between 10.5 and 16 ounces.


The standard weight of a volleyball in both professional beach and indoor competition is between 8.36 and 9 ounces. This is based on the rule book of the Federation of International Volleyball (FIVB), the governing body of Olympic and international play.


The male American black bear averages around 250 pounds although some may weigh as little as 125 pounds or as much as above 600 pounds. Female black bears average around 150 pounds, although their weights can range from 90 pounds on the low end to over 300 pounds on the high end.


The most that a letter can weigh and still be shipped using the United States Postal Service's First-Class service is 3.5 ounces. Letters weighing more may be subject to additional postage charges. Letters that do not bend, have clasps or are lumpy may also incur a nonmachinable surcharge.


Common table salt, or sodium chloride, has a molar mass of 58.4 grams per mole. Chlorine accounts for roughly 60 percent of this chemical's total mass.


Male tigers usually weigh from 220 to 675 pounds; female tigers weigh from 200 to 368 pounds. A male Siberian tiger shot in 1950 reportedly weighed 847 pounds.


The average passenger car tire weighs between 20 and 22 pounds, light truck tires less than 17 inches in diameter weigh around 35 pounds, and semi-truck tires weigh between 105 and 110 pounds. The weight of off-road tires varies depending on use, such as for agriculture, mining or large equipment. S


The moon is moving through space in free-fall and is therefore regarded as weightless. Weight, defined as the net force of gravity on an object, is not relative to an orbiting body such as the moon.


A liter is the metric unit of volume, not of mass or weight. The weight of a substance occupying 1 liter depends entirely on its density. For example, water has a density of approximately 1 gram per milliliter; hence, 1 liter of water weighs about 1 kilogram, or 2.2 lbs.


The original 747-100, launched in 1970, weighs 385,000 pounds when empty and has a maximum takeoff weight of 750,000 pounds, according to Airliners.net. The 747-400 model, which entered service in 1989, has an empty weight of 399,000 pounds.