Mqyz When scientists work with creative people, cooler stories get told
With only a few exceptions*, high rise buildings use elevator designs that haven ;t radically changed in decades. We place a single elevator cab into a long vertical elevator shaft that runs either the full height of a building or, in the case of some very tall buildings, for a small portion of the building full height. This means that at any given time, only one floor of an elevator shaft is in use, while all of the remaining floors are empty
stanley gertuve and must remain empty until the elevator cab returns to or passes by the floor again. P
stanley kubek ut succinctly, this is fundamentally wasteful. To give the discussion some actual numbers, lets take a real
stanley website building. The John Hancock Centermakes an excellent example, as it is conveniently, exactly 100 floors tall and has a whopping 50 elevators. Elevator shaft dimensions can vary considerably, but a reasonable size is 8 215;8 feet, or 64 square-feet. Now, not all elevators service all floors, so let assume, just for argument sake, that 17 elevators serve the first 33 floors, 17 service the next floors 34-66 , and the remaining 16 service the last floors 67-100 . Remember, even if an elevator only opens for some floors at the top of the building, all of the floors below are still filled with a shaft and the space is unusable, even if there is no door. So, we have a total of 17 215;33 + 17 215;66 + 100 215;16=3283 elevator spaces, and from above, we ;ve estimated that each elevator space takes roughly 64ft^2 Oohy These Salt Mines Look Like Landscapes From Another Planet
Potassium chlorate isn ;t particularly dangerous. It nothing but a potassium atom, a chlorine atom, and three oxygen atoms. Hardly sinister. If anything, it generous to a fault, willing to give out the oxygen atoms to anything nearby. And the video you watched above is what it looks like when it gives out those oxygen atoms to some red phosphorus. The mixture is so volatile that most people are cautioned against even trying to stir it. And this is what on the head of most strike-anywhere matches. It true that manufacturers add a little sulfur to the phosphorus, but they also add ground glass to the mixture, to give it built-in friction. Hit the match somewhere and the whole thing goes up. Safety matches, on the other
stanley cup hand, have the oxidizer on the head of the match, and the phosphorus on the red friction strip on the side of the box. Image: Sebastian Ritter Via The Department of Chemistry. ChemistryScience
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