The Not-So-Perfect Kilogram and Why the Metric System Might Be Screwed…


mentalfloss.com

Image credit: International Bureau of Weights and Measures

Hidden in a vault outside Paris, vacuum-sealed under three bell jars, sits a palm-sized metal cylinder known as the International Prototype Kilogram, or “Le Grand K.” Forged in 1879 from an alloy of platinum and iridium, it was hailed as the “perfect” kilogram—the gold standard by which other kilograms would be judged.

Although it’s arguably the world’s most famous weight, Le Grand K doesn’t get out much. Since hydrocarbons on fingertips or moisture in the air could contaminate its pristine surface, it goes untouched for decades, under triple lock and key at the International Bureau of Weights and Measures. Every 40 years, however, it makes an appearance. The weight is ushered from its chamber, washed with alcohol, polished, and weighed against 80 official replicas hand-delivered from laboratories around the world.Today, whenever scientists need to verify something is precisely one kilogram, they turn to one of these replicas, over which Le Grand K reigns supreme.

This system sounds absurd, but not too long ago, lots of units relied on similar methods. The kilogram was just one of seven standards of measurement established by the French Academy of Sciences in 1791, all based on physical prototypes. These benchmarks caught on worldwide because standardization was sorely needed. At the time, some 250,000 different units of weights and measures existed in France alone, which meant that the only constant was complete chaos.

Weight Problem Continuar leyendo «The Not-So-Perfect Kilogram and Why the Metric System Might Be Screwed…»

Once A Like Not Always A Like On Facebook

The race is on for Facebook likes. Every brand, small business and individual around the world are looking for them but I wanted to have a look at what happens after you get those elusive likes. Nobody thinks about what happens to the likes that they already have with most just looking at the top line figure. I wanted to ask…Do people who like your page automatically see your content? How many people are un-liking your page? Are people hiding your content or are they just ignoring you? Getting likes on Facebook is as easy as paying a few cents per like (and you can be sure at that price they are not worth much) but the real challenge is keeping them and making sure you engage with the people who like your page through lasting content. So here is how Facebook determines just what you see each time you log in to Facebook…


by Niall Harbison
http://www.simplyzesty.com/facebook/once-a-like-not-always-a-like-on-facebook/

 

The race is on for Facebook likes. Every brand, small business and individual around the world are looking for them but I wanted to have a look at what happens after you get those elusive likes. Nobody thinks about what happens to the likes that they already have with most just looking at the top line figure. I wanted to ask…Do people who like your page automatically see your content? How many people are un-liking your page? Are people hiding your content or are they just ignoring you? Getting likes on Facebook is as easy as paying a few cents per like (and you can be sure at that price they are not worth much) but the real challenge is keeping them and making sure you engage with the people who like your page through lasting content. So here is how Facebook determines just what you see each time you log in to Facebook… Continuar leyendo «Once A Like Not Always A Like On Facebook»

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