In 1857, Irish scientist John Tyndall recognized that sound waves could extinguish flames. Now, scientists hope that phenomena could lead to the development of new fire extinguishers that would be useful, say, in a spacecraft or terrestrially to avoid water damage from sprinklers. First though, they need to figure out why exactly sound can snuff fire. Most likely, the sound wave causes a drop in pressure that extinguishes the flame. From Scientific American:
In 2004 Dmitriy Plaks and several of his fellow students at the University of West Georgia tested whether sound waves can douse fires in hopes of using sound to extinguish flames in a spacecraft. They placed a candle in a large topless chamber with three bass speakers attached to the walls. The candle was lit and the Canadian rock band Nickelback's "How you remind me" was pumped through the subwoofers. Within roughly 10 seconds, once the song hit a low note, the flame was out, according to results published in 2005 in The Journal of the Acoustical Society of America.
The text of the proposed legislation has not been released.
“YouTube is disabling all comments on videos featuring young children as it attempts to head off an organised ring of paedophiles who were using its site to trade clips of young girls in states of undress,” says the Guardian’s Alex Hern.
The company says 190 employees in Santa Clara and Sunnyvale, CA will lose their jobs.
Big companies want automation on a big scale. Doing that means diving into the tricky world of machine learning and data science. And no matter what platform you’ll be implementing it on, you can learn how with the Machine Learning & Data Science Certification Training Bundle. In 48 hours and through eight courses, this bundle […]
Big systems need tight security – and the experts who can implement it. Cisco Networking Systems are the go-to providers for network infrastructure, but maintaining it takes a lot of up-to-date knowledge. If you want that knowledge right from the source, there’s an online course that can get you certified painlessly: The Foundational Cisco CCNA […]
Computer slowing down? There are a ton of reasons why that might be, especially if your unit has a few years on it. Junk files and programs can accumulate over time, some even left over from otherwise uninstalled software. This virtual debris can slow your PC down dramatically, but there’s a surprisingly quick fix. Lauded […]