Hvyj How Scientists Suck the Salt Out of Seawater With Electricity
They rolled them. Actually, to be more precise, this new idea is a variation of an older idea, which theorized that the Egyptians attached circle rockers to the blocks, turning them into cylinders that could easily be rolled to their destination. But, as the Physics arXiv blog points out, this ideas has some flaws: the cylinders would have exerted huge pressure on the ground causing considerable damage to roads. Modern estimates of the rate at which the pyramid was built suggest that workers moved some 40 blocks per day. If so, then even well-engineered roads would have required considerable maintenance. In a recently published paper, Indiana University physicist Joseph West and some c
stanleys cups olleagues propose a different approach that considerably reduc
stanley cup es the ground pressure but at the same time allows the blocks to be moved with significantly less effort than dragging them. As Physics arXiv notes: Their idea is remarkably simple. They strap wooden rods to a block, turning its profile from a square into a dodecagon, which can then be moved more easily by rolling. West and co have tested their idea on a scale model consist
stanley gertuve ing of a concrete block the shape of the square prism. This block was 20 cm square; 40 cm long and weighed almost 30 kilograms. They attached a set of three wooden dowel rods to each face of the block transforming its cross-section from a square to dodecagon. Finally, they attached a rope to the top of the block and measured the force required to set the block rolli Ilzv If the Rapture Really Happened, It Would Look Like This
has set up on installation that combines 15 wooden stairways, creating a dizzying maze designed to confuse visitors. The installation is part of the London Design Festival, which starts tomorrow. There no specific function it serves, except to give visitors a
stanley becher beautiful view of London overlooking the Thames. dRMM founder Alex de Rijke told Dezeen that 8220 tairs are always the most interesting things about architecture [because they ;re] the places where people meet. Some of the staircases go so high you can see all the way to St. Paul Cathedral. Others have dead ends. Others will lead you to more staircases. It an Escher-esque maze brought to life, and even if there is no point, it an amazing, real-life optical illusion. [Dezeen] Image credit: Dezeen
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