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0.00273 megatonnes is about 20,000,000 times as heavy as a Baseball
In other words, it's 18,789,837.2921670 times the weight of a Baseball, and the weight of a Baseball is 0.0000000532202586137810 times that amount.
(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 0.0000000001417476156250 megatonnes and 0.000000000148834996406250 megatonnes. 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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