Our Internet went out for a few hours today, so naturally my smart switches, lights, cameras, motion sensors, door sensors, and power monitoring... continued to work as of nothing was wrong.
Home Assistant is great, and using local-only devices is awesome. If my smart home stops working it's my own fault, not some 3rd party.
Your numbers seem reasonable --- more intuitive for me to work in terms of pressure. Atmosphere is (roughly) 1e3 Torr, good UHV can be around 1e-10, so that's 13 orders of magnitude, which is (roughly) the same difference that you calculated.
Aluminum foil is very common in physics labs. And a main use for it is "baking"! To get ultra high vacuum (UHV)* you generally need to "bake out" your chamber while you pump down. Foil is used same as with baking food --- keep the heat in and evenly distributed on the chamber.
Sadly, it's usually not food grade aluminum foil, as that can contain oils, and oils and vacuum are generally a big no-no.
*Just how good is UHV? Roughly: I live in San Francisco, which is 7 miles by ~7 miles (11km). Imagine you raise that by another 7 miles to make a cube. Now, evacuate every last molecule of gas out of it. Now take a family sedan's trunk, fill it with 1 atmosphere of gas, and release that into the 7 mile cube. That's roughly UHV pressure.
The couple used to physically fight regularly and, according to Osbourne, they would "beat the shit out of each other." She has described herself as "a beaten woman" when she was at the hands of husband Ozzy where he once knocked out her front teeth. She once retaliated by throwing a full bottle of scotch at his head.
Tbh that doesn't sound too bad? Like maybe take a nice shower but with cruelty free/plant-based soap that wasn't animal tested (and obviously there's no drought concern in this scenario).
Yeah, but do they like Huey Lewis and the News?
Hey Paulina!