Did you know?
Mass of a half-filled sandbag as used in flood control (13.6 kg) is 5 thousand x Mass of a table tennis ball (2.7 g)
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Diameter of US dollar coin (26.5 mm)
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.