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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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Number of Estimated British civilians killed in World War I (2,000 )
If this was a standard unit ...
"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
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