Record Player Construction Fishing Buoys Blood Filtration Units Airplanes 
Answer: Airplanes
Magic Eraser cleaning sponges might seem magic when they remove that ugly stain from your patio furniture or brighten up the plastic on an old toy, but it’s not magic (no matter how impressive), but microscopic science. Magic Erasers are made from a compound known, formally, as melamine foam, and melamine is a micro-abrasive. The reason the erasers remove stains that your other cleaning products wouldn’t touch is because you’re sanding, with a very very fine grit, the surface of the object and physically removing the stain.
In addition to serving as an excellent micro-abrasive, melamine foam has properties that make it useful in the construction of airplanes (as well as high speed trains and other transportation applications). First, the melamine component of melamine foam is naturally fire retardant as it is 67 percent nitrogen by mass and, when mixed with resins, releases lots of fire-retarding nitrogen gas when burned. More importantly, however, and the reason it is used in newer planes and trains, it is an extremely lightweight but highly sound deadening material and an excellent insulator.
Pack the empty spaces in a plane’s body with melamine foam and you add hardly any weight (a cubic foot of the foam weighs a fraction of an ounce), but you add significant amounts of sound and heat insulation.
Image courtesy of Andrew Malone.
We all have a pretty good idea of the fonts that we do and do not have installed on our computers, but what is going on when you receive a Microsoft Word document that ‘displays’ a font you know is not installed on your computer? Today’s SuperUser Q&A post helps clear things up for a confused
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If you order a lot of stuff off of Amazon, you probably have an extensive order history. Today, we want to discuss how you can manage past orders and even archive them so they’re no longer visible in the list.
Ask anyone who’s tried to make an extra buck or two on Wall Street on their own, and they’ll all tell you the same thing: investing is hard. But, thanks to a new collection of apps, now it doesn’t have to be so confusing that only the financial elite can really understand when the market is up, when
Apple offers a “Find My Mac” service to track a lost or stolen stolen Mac computer. However, Microsoft doesn’t provide an equivalent service for Windows PCs — not even for tablets running Windows 8.
Whether we’re comparing Firefox to Chrome or testing the real-world speed benefits of a 64-bit browser, I see a lot of comments saying one browser feels faster. When people compare web browsers, they don’t usually perform rigorous benchmarks.
Windows 10 includes OneDrive, and Microsoft’s official party line is that you can’t disable it. That’s not true — there are several ways to disable OneDrive and remove it from File Explorer on Windows 10.
You might know that there are special cameras for shooting panoramic pictures. Today, we’ll put one together in seconds that we shot with a regular digital camera and a tripod. Grab your favorite image editor and camera, and let’s go!
The internet exploded Friday with the news that Google Chrome extensions are being sold and injected with adware. But the little-known and much more important fact is that your extensions are spying on you and selling your browsing history to shady corporations. HTG investigates.
The 10 most important things from Apple’s iPhone 6S event
