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4,000 kilograms is about 30,000 times as heavy as a Baseball
In other words, it's 27,530.897131380 times the weight of a Baseball, and the weight of a Baseball is 0.0000363228265039060 times that amount.
(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 0.1417476156250 kilograms and 0.148834996406250 kilograms. A major league pitcher can throw a baseball at up to 150 kph (91 mph) (with a fastball pitch), with record-setting pitches as fast as 171 kph (106 mph).
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