Did you know? Mass of a bottle of champagne (1.6 kg) is 200 x Mass of a British gold sovereign coin (7.99 g)
Mass of water in an Olympic Swimming pool at minimum depth of 2m (2.5 million kg)
/fact/mass-of-water-in-an-olympic-swimming-pool-at-minimum-depth-of-2m
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If this was a standard unit ...