You may have heard that concrete shoes were used by mobsters to resolve certain “disagreements”. As it turns out, the composition of the concrete the mobsters used would determine the shoes’ buoyancy.
Whether something can float in water seems pretty straightforward at first blush. Light things float, and heavy things don't — wood, ducks, and witches float, while rocks, metal, and Russian boss ...
INNOVATION: Students Te Wainui Mansell (left), Adam Filer and Roze Robertson test the concrete boat model at Wanganui City College.PHOTO/ STUART MUNRO Wanganui City College students have been learning ...
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