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Joined 1 year ago
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Cake day: July 3rd, 2023

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  • I think it falls into the same pitfalls as most super niche communities, like a lot of subreddits did.

    For example, the shaving subreddit (/r/wicked_edge I think?). Its mission statement was to introduce people to cleaner, safer, and more efficient shaving methods. And for the most part, with all of its resources and wikis, it successfully did it. But if you choose to stay after you’ve made your informed purchases, the posts were mostly braggarts showing off their latest hundreds-of-dollars handles, supreme razor blades, brushes made from actual gold, that sort of thing. My point is, the average person (by my guess, like 90% of people going to the site) gets the information they need and then never participate in the community again. But those who stay are those who really want to stay– people who are most likely to brag and boast. So over time, it falls more and more into plain old dick measuring contests.

    This obviously isn’t true of all communities, but I think it’s a common pitfall for a lot of them. I can imagine privacy is very similar: take all the steps you can to learn to protect your privacy, and then… you’re good, for the most part.


  • As a little nitpick, “extreme pressure” is partially true. We do need “extreme” pressure; not extremely high pressure, but extremely low pressure. We have these series of pumps that are able to remove more and more particles at each step. We have your standard pumps that get rid of most gases, then we have turbomolecular pumps that blow away a lot of the matter that remains, and then we have things like ion pumps, which electrocutes molecules in a vacuum and sucks them out using electric fields. This way, we’re able to create better vacuums here on Earth better than Space itself.

    And honestly, that’s pretty much wizardry to me.






  • funnystuff97@lemmy.worldtoScience Memes@mander.xyzThermal Energy Intuition
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    1 year ago

    My math: Boiling a cup (0.24 kg) of water from 25°C to 70°C ~45kJ (0.24kg×45°C×4182J/kg°C) Raising 0.24 kg of water up a height 30,000 m ~ 71kJ (0.24kg × 9.8m/s^2 × 30,000 m)

    So my math says raising the temp of a cup of water from room temp would be equivalent to raising it about 19 km high.

    Edit: I’m a moron who can’t read, boiling water from 25 to 100 °C takes:

    0.24 kg × 75 °C × 4182 J/kg°C ~ 75kJ