Correction for the weight of a Baseball
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How heavy is 1.90 monme (匁)?
It's about one-twentieth as heavy as a Baseball
The weight of a Baseball is about 38.7443482708330 monme (匁).
(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 37.7993641666670 monme (匁) and 39.6893323750 monme (匁). 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).