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0.000003640 kilograms is about four-fifths as heavy as a Grain of Sand
In other words, it's 0.830 times the weight of a Grain of Sand, and the weight of a Grain of Sand is 1.20 times that amount.
(medium grain)
With tremendous variety in the size of grain and the component material, grains of sand weigh an average of 0.00000440 kilograms. In 2007, a team of seven in Myrtle Beach created the world's tallest sandcastle, which measured 15.10 m (49.55 ft) in height.
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