Correction for the weight of a Compact disc
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How heavy is 742 fluid drams (ʒ)?
It's about 200 times as heavy as a Compact disc
The weight of a Compact disc is about 3.90 fluid drams (ʒ).
(a.k.a. CD)
A compact disc typically weighs 3.90 fluid drams (ʒ). Data is stored on CDs by encoding into the track a series of tiny pits — each between 3.5 and 850 µm (0.00014 and 0.033 in) in length.