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Bluebulb Projects presents:
451.6 cubic centimeters is about one-tenth as as a Bowling Ball.
In other words, it's 0.085703268271 times the of a Bowling Ball, and the of a Bowling Ball is 11.668166456 times that amount.
(USBC specifications; tenpin) According to United States Bowling Congress specifications, a tenpin bowling ball should measure at least 10.795 cm (4.25 in) in radius for a total volume of about 5,269.3439715 cu. cm. Because regulation balls measure the same diameter irrespective of their weight, ball density varies by size and balls weighing less than about 5 kg (11 lbs) will float in water.