how do they measure the speed of a fastball?

Subject: how do they measure the speed of a fastball?

Date: Tue Mar 9 14:50:10 1999
Posted by No name entered.
Grade level: 7-9 School: No school entered.
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Area of science: Other
ID: 921012610.Ot

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Re: how do they measure the speed of a fastball?

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