Recent content by henry1

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    Mini circular saw not cutting straight

    Have you been going through my internet history? i've just bought a Makita saw at only £60 this week.
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    Mini circular saw not cutting straight

    I've just done a few tests. I was (obviously) wrong when I said that cutting freehand makes it veer to the left. There's no base plate fighting it so when I cut without a baton, it cut along the line. I removed the blade and put another in place and it cut perfectly fine the first time...
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    Mini circular saw not cutting straight

    Well the top looks different to the bottom but I think only because the bottom has been polished on purpose. Otherwise it looks like a thin plate that has been bent. The plate is by no means flexible though. Attached is a pic of the saw.
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    Mini circular saw not cutting straight

    All good suggestions. The circular saw was working perfectly fine for years. It's only recently that I have started having this problem. I may have dropped it in the past or knocked it, although i don't remember. That would explain why it doesn't cut in a straight line anymore. The baton is...
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    Mini circular saw not cutting straight

    Before I throw it away, I want to make sure it's not possible to save it. It's a Parkside one I've had for a few years. When cutting with a batten to the left to guide it, it forces its way to the left. This tells me the blade is not aligned with the left side of the base plate and points to...
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    Some brain teaser for the scientific-minded

    Who wallpapers a ceiling? So the tile can be infinitely large (and heavy) and as long as the adhesive's strength is higher than the force of gravity per unit area, it will always hold?
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    Some brain teaser for the scientific-minded

    I didn't expect that for pins. I know some spiders can walk on water. The pin floats because the weight is not enough to break the surface tension. If you put 1000 pins next to each other, I would expect them to float as well as long the surface tension is the same. In reality I suppose the...
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    Some brain teaser for the scientific-minded

    More than that of water. I don't know, I don't think it matters as it's the same for both tiles.
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    Some brain teaser for the scientific-minded

    Tile ain't gonna flex?
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    Some brain teaser for the scientific-minded

    Area is not relevant for gravity but it is relevant for the adhesive. We all know it doesn't work that way and that the large tile will fall off but so far no one has been able to explain why.
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    Some brain teaser for the scientific-minded

    Of course the bigger tile is heavier but so is its surface area, in fact 40,000 larger. So that's plenty of surface for the adhesive to grip on.
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    Some brain teaser for the scientific-minded

    It doesn't have to be linear or non-linear. The adhesive will only act where it is applied, so we could consider it acting only in its tiny 1 cm x 1 cm little square within the large tile. What the adhesive is doing in one corner doesn't affect the adhesive in the other corner as long as both...
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    Some brain teaser for the scientific-minded

    a steel pin doesn't float although steel does float if shaped appropriately.
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    Some brain teaser for the scientific-minded

    We all know the large tile won't hold up and we all intuitively say because it's too heavy. But is that really the case? The bonding property of the adhesive many not be uniform but over a 2 m x 2 m surface, could any irregularity be negligible? It's not as if 25% of the surface won't bond.
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    Some brain teaser for the scientific-minded

    If I have an adhesive that holds a 1 cm x 1 cm tile onto the ceiling, will the same adhesive hold a similar tile 2 m x 2 m onto the same ceiling? If not, why not? Before you say it's heavier, consider that the adhesive is providing the same force per unit area for both tiles, and the force of...
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