Is 807 nanograms as heavy as a Tennis Ball?
It's about 0.00000002 times as heavy as a Tennis Ball
The weight of a Tennis Ball is about 57,700,000,000 nanograms.
(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must weigh about 57,700,000,000 nanograms. Competition balls are also tested for bounce height, with the standards requiring that a ball dropped from 254 cm must bounce back to a height of 135 cm to 147 cm.
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