Ever notice that cocktail shaker cans get vacuumed together when you shake a drink? The encoldening of all the stuff inside is doing it, creating enough vac that you need to apply about 13.6 pounds of force to pull a small shaker apart.
First, the air that's in your shaker starts off at room temperature. As you are shaking, this air gets cooled just like your drink does. Cooling the air causes the pressure to go down, which causes a vacuum. That isn't all that's happening, though. Ice is less dense than water. When ice melts, it actually contracts in volume. When the volume of liquid plus ice in the shaker contracts, the volume of air in the shaker increases. Since you aren't adding more air molecules, increasing the volume decreases pressure, causing more vacuum. Third, as your liquor gets colder, its density increases, again shrinking in volume and creating more vacuum. A third factor may be a small amount of expelled air when the bartender slams down on the cans before the shake.
More Cocktail Science: Why Do My Shaker Cans Get Sucked Together?
(Image: Cocktail Shakers, a Creative Commons Attribution (2.0) image from walkn's photostream)
How did Twitter addict Jesse Singal become the anti-transgender spokesgoblin of his generation? When a Child Says She’s Trans continues his creepy fixation on gender-nonconforming minors. The “ex-trans” movement, similar to the discredited “ex-gay” movement, can always count on axe-grinding coverage that vastly over-represents their numbers and POV.
BeauHD, a Slashdot moderator, has Crohn's Disease, and he lives in an age of modern miracles, which means that he can have his small intestine surveyed by swallowing a tiny pill-sized camera, rather than having a scope threaded up his rectum or down his throat, or having his gut sliced open.
The National Institutes of Health maintain a 3D Print Exchange, a kind of miniature Thingiverse for open-licensed, 3D printable objects for teaching and practicing public health.
The cybersecurity landscape is changing, and now one of the most effective ways to counter hacking threats is to employ another hacker against them. Commonly referred to as ethical hackers, these professionals use a cybercriminal’s tools against them, checking networks for vulnerabilities and patching them up before they can be exploited. The Certified Ethical Hacker Bootcamp […]
The human eye is a powerful thing, but it’s not so great at seeing in the dark or around tight spaces, which is partially why most of us struggle with unplugging drains, cleaning under the fridge, and other hard-to-reach jobs. This 1080p HD Waterproof WiFi Wireless Endoscopic Camera, however, gives you the flexibility necessary to get […]
Macs are undeniably some of the most versatile computers on the market, but they can do so much more than what their stock apps allow. For those looking to get the most out of their Mac hardware, the Pay What You Want 2018 Super Mac Bundle features 10 of the industry’s top apps, including photo editors and […]