Correction for the weight of a Grain of Sand
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How heavy is 0.019 pennyweights?
It's about six-and-a-half times as heavy as a Grain of Sand
The weight of a Grain of Sand is about 0.0028 pennyweights.
(medium grain)
With tremendous variety in the size of grain and the component material, grains of sand weigh an average of 0.0028 pennyweights. 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.