Quirky Science
aktuálne záležitosti, politika, E1, S1606122255, 2015
Quirky Science
E02 Cooling is more than a luxury. Nowadays it is a necessity. Without refrigerated shipping and stocking, fresh food wouldn't reach our supermarket so easily. Can you imagine living without it? Before the invention of the refrigerator, icehouses were used to provide cool storage for most of the year. To cool our food and beverages, blocks of ice were simply cut out of frozen lakes and shipped to far and beyond. The so-called "ice-industry" came to its end when, in the late 1900s, our waters became too polluted to serve as a cool preserving agent. Air-conditioning, on the other hand, was actually invented to control the humidity that was ruining the paper of printing offices, rather than the technology being used to cool you off. The quirky part is, you can't create cold; you can only "move" temperature form one place to another. The first one to find a technology that cooled the inside of a box - the forefather of the refrigerator - was a medical doctor. In fact, he thought he...
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E01 Mankind has been flying for over a century. As early as the 1500s Leonardo da Vinci tried to build a flying machine. Drawing inspiration from birds he gave it wings. Unfortunately, his "Ornithopter" didn't work, and indeed, the airplanes of today do not have flapping wings! We also tried it with balloons. Huge 245-metre long airships that needed the guts of between 80,000 to 200,000 cows! But, it was the kite that became the forerunner of the flying machine. A kite made by the now famous Wright brothers. The two brothers were bicycle repairmen, which convinced them that a flying machine could be highly unstable and yet controllable, such as with bicycles. They built their kites as strong as their bicycle frames and used bicycle parts to test their workings. The early Wright planes could manage no more than 65 km/h. Nowadays, a commercial plane can top 800 km/h. What is it that make our current planes fly 12 times faster? Well, one British Royal Air pilot, Frank Whittle,...
Guías de TV
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domenica, 18:25 | Quirky Science |
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domenica, 18:55 | Quirky Science |
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martedì, 00:30 | Quirky Science |