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26 October, 22:19

A tennis ball weights about 56.7 grams. About how many ounces would a dozen tennis balls weight?

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  1. 26 October, 22:48
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    Nothing "weighs" 56.7 grams. "Gram" is a unit of mass, not force or weight.

    On Earth, 28.35 grams of mass weigh about 1 ounce.

    1 dozen of anything = 12 of them

    If each tennis ball has 56.7 grams of mass, then a dozen of them

    have

    (12) x (56.7) = 680.4 grams of mass.

    Their weight is (680.4 grams) x (1 ounce / 28.35 grams) =

    (680.4 / 28.35) = 24 ounces.

    That's 1.5 pounds.
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