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37
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130
Joined
2 yr. ago

Albama

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  • I don’t think this is quite right. Read up on “time of useful consciousness”. I think if you exhale the air in your lungs and inhale oxygen-free air you’ll be out much faster than if you just held your breath. I’m not entirely sure if total pressure matters or partial pressure matters, but I’m quite sure that there will be some similar effect. I have found some claims that the partial pressure is the major factor, so breathing pure nitrogen seems like it would incapacitate someone faster than holding their breath does, because the nitrogen is actively removing oxygen from their blood.

  • It’s true they’re at worst 100% efficient, but they’re also typically sized lower than resistive electric heaters in terms of input power. In the US, a residential heat pump likely draws about 4kW, whereas resistive heat strips or baseboard heating could be multiples of that. As an air source heat pump’s output drops on very cold days, a unit rated for e.g. 48000BTU/hr at 47°f might produce only half of that at 5°f/-15c. A “good” unit here would produce perhaps 75%. The way we do HVAC sizing, unless you radically oversized the system for most weather (including air conditioning) you’ll need a backup source of heat on the coldest days.

    Code (law specifying how much heating / cooling capacity is required in normal worst-case weather conditions) where I live would require me to use about 2x the normal sizing to achieve pure heat pump heating at the required design temperature (around 5f/-15c). That means at the peak of summer (about 100f/38c) the unit would be operating at less than half of its full cooling capacity.

    Apologies for weird units; I live in MAGAland.

  • You don’t have to be a jerk about it. And after reading about this briefly I think that your presentation is misleading (and possibly factually incorrect; I didn’t immediately find sources that ISIS terrorists died from chemical exposure, though I didn’t look long).

    Wikipedia says weapons there were being decommissioned, and The Guardian says when ISIS took the facility the US wasn’t particularly concerned because there was nothing usable or intact there.. We didn’t invade Iraq for decommissioning old weapons.

    And it was not far-fetched that Hamas could have been using tunnels under hospitals as a command center. Most people just don’t think attacking the hospital on the surface is justified even if so, since the people on the surface had no way of avoiding it. But any excuse to ethnically cleanse Palestine will do for right-wing Israelis.

  • Hmm, planning would require coordination. The shift A team would need to agree to stay until the shift B team expects to arrive. How could we make sure they’re on the same page?

    Maybe they could do it based on the sun being at a certain spot in the sky? That might be hard on cloudy days. Maybe we could invent a device that tells us approximately where the sun would be if we could see it. We could call it “cock” like roosters that crow to wake us up…but that might make 12 year olds chuckle so how about we call it a “clock” and then fixate on the number it shows?

    (If you were being sarcastic / facetious in your initial post I apologize, but I took your original post as one of the “hurr durr just ignore the clock” posts some people have been making, which completely fail to recognize why we do make ourselves slaves to the clock).

  • Because I know how to use vim, and haven’t really tried vscode. I doubt there are any real advantages of vim other than inertia, and as I understand vscode plugins / extensions could give me vim keybindings if I wanted them. I’ll try it some day.

  • For a business, Prusa probably makes sense. You lose money when things don’t turn out right, so spending a bit more up front is the right choice.

    Beware that FDM prints are full of tiny holes which are basically impossible to thoroughly clean, so they can be “food safe” for the first use, but once they’re used they may be dirty forever.