Did you know? Mass of the lightest allowable regulation baseball (142 g) is 40 x Mass of a UK penny (1p piece) (3.56 g)
Energy in an Olympic Javelin throw (360 J)
/fact/energy-in-an-olympic-javelin-throw
Link
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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