You stroll into your favorite food-jobber, looking to pick up a few things on your way home from work. Lots of people are on their way home from work. There are lines at every register and someone is in the self-checkout with $600-worth of groceries, beginning what will eventually become a 30-minute stop-start process that could have been handled in a five minutes by even the most incompetent cashier.
That’s when you start considering your options. Do you take the slightly shorter line manned by yet another interchangeable teen who is only working a register because the manager scrambled help to the front — one who would otherwise just be at the back of the store milking…
It’s been nearly four years since the Arecibo Telescope collapsed, an event the world got to witness in unprecedented detail thanks to strategically positioned drones. They captured breathtaking video of one of the support cables pulling from its socket as well as the spectacularly destructive results of 900 tons of scientific instruments crashing into the 300-meter primary reflector. But exactly why did those cable sockets fail?
A new report aims to answer that question, and in the process raises some interesting questions of its own. The proximate causes of the collapse have been known for a while, including the most obvious and visible one, the failure of the zinc “spelter sockets” that were cast around the splayed…
External feed Read More at the Source: https://hackaday.com/2024/11/05/zinc-creep-and-electroplasticity-why-arecibo-collapsed/