Recent content by freeelectron

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    I Optimal space between anchor points on a long piece of material

    That would be a good idea indeed. My question is more at a "mathematical" level. I'm mostly curious about the optimal way to place the last/first anchor points on a finite length.
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    I Optimal space between anchor points on a long piece of material

    I mean an even pressure by the lumber on the board all along the length, but you could also call it an even pull by the screws on the board. Basically, the idea is to spread the screws evenly, even though the lumber has ends. Baluncore's answer sounds perfect. If someone has an explanation for...
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    I Optimal space between anchor points on a long piece of material

    Let's say I want to fix a 4x4 lumber against a flat board, or any other material against any other. Depending on the situation, I may use 3, 4 or 5 screws or even more. Regarding the last and first screws, what distance should there be between them and the end of the lumber to ensure an even...
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    Energy consumed by weight of gear on a multiday hike

    Thanks It looks like every additional kg on a 6h hiking day (3h going up, plus some energy for the flat parts and downhills) with a 10% grade would add ~200 kcal, which doesn't sound totally off, but I expected more. That's another interesting calculator...
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    Energy consumed by weight of gear on a multiday hike

    I'm trying to figure out how many extra kcal I would burn on a 600km hike with a 30,000m (30km) positive gain for every additional 100g (or 1kg, whatever) of gear in my backpack. It would obviously be a quite rough approximation, as there are significant variables such as the efficiency of a...
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    I Heat transfer via air cooling -- which airflow direction is best?

    I'm using a stainless steel pan and a fan to cool my coffee down as quickly as possible. Usually, I have the fan blowing down towards the coffee, but this morning I flipped it over to suck the heat out of the coffee and I'm wondering which of the two is the most efficient, especially as, in the...
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    Best outside color for thermal insulation

    I'm wondering if the outside color has an influence on the thermal depletion of things such as a thermos, a wall, etc. Assuming, obviously, there's no sunlight hitting on them. It certainly has, but what difference percentage can we typically expect for example for bottles such as the ones on...
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    What Math to learn for Cosmology?

    Summary: Roadmap of most useful math to learn to better understand cosmology I just watched ~20 hours of a serie of videos about cosmology, which stayed at a conceptual level for easier understanding (= minimal math). I understood about 98% of it and now have a decent understanding of...
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    I Where does gravity switch from stronger to weaker, if it does?

    I read everywhere that gravity is slightly stronger at the bottom of a mountain than at the top because the place is closer to the celestial body that causes the "attraction". What I don't understand is that, as you get closer to the center of the planet, there's less matter below you and...
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    Uncertainty principle - Nature of observer

    Uncertainty principle -- Nature of observer About the fact that electrons have a determined position only after having been observed/measured, I don't understand how they make the difference between being watched by an eye/instrument or any non-measuring object just sitting there.
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