• 84 Posts
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Joined 2 years ago
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Cake day: August 15th, 2023

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  • I’ll walk through it again, as you are probably right, and I can find the mistake.

    1800g is the estimate weight of 450gml silver powder.

    The total weight is 1464g.

    There is 250ml (g) of water at the top of the container, which we subtract from the total weight, leaving 1214g of a silver/water slurry.

    1800g should be the weight

    1214g is the weight.

    (Here is the mistake) The weight difference is 516g, which is the weight of the missing silver in the slurry, not the weight of the water in the slurry.

    So, I would need to convert 516g to an approximate volume of silver powder. Since we have volume, we can now compute the weight of the water in the slurry.



  • Just got it.

    It’s tap and hold thumbnail with one finger -> use another finger to do a “zoom out” gesture on the screen.

    It seems to happen only on image posts, and when you don’t trigger a page reload or side menu open behind the opened preview.

    (Also, it’s still super rare to trigger the bug. I only just got it twice since I started responding to your comment.)

    Edit: Reliable trigger:

    Press and hold thumbnail -> use another finger open side menu -> click “All” or other menu choice -> release first finger.



  • 250ml solution (mostly water on top) = 250g

    700g (if 700ml water) - 250g = 450ml silver slurry

    450ml silver powder weight (dry) = 1800g

    1464g (total) - 250g (excess water) = 1214g

    450ml slurry = 1214g slurry

    1800g (dry silver) - 1214g (silver slurry) = 516g (516ml water in slurry)

    1464g (total) - 516g (water) = 948g silver powder.

    I always miss something obviously stupid when doing math in public. However, it sounds suspiciously close to a 1kg starting weight of silver though.








  • There is a caveat, but yes: By definition, 3D printed parts should not be considered food safe.

    Single-use cookie cutters are generally OK if you don’t use them multiple times a day every day.

    There are probably minor chemical risks but it wouldn’t be in high enough quantities to kill you. There isn’t really anything inherently food unsafe with PLA, ABS or PETG.

    Bacteria is a much bigger risk during reuse because you can’t fully clean the prints between the layer lines and other surface defects. The plastic generally won’t survive a proper sanitization process either.

    What your own risk tolerance is for plastic additives is up to you. If you do print a cookie cutter, toss it after you are done.


  • HF tools are not designed for the long term, generally. If you need a tool to work at least once, for one job that you are never going to do again, HF is “good enough”.

    The rule of thumb is to never buy a tool there that could result in a gruesome death if it fails to protect your life, like jack stands. (Invest in quality safety equipment first if you get something like an angle grinder.)



  • And it’s about a mile? Many common rifle bullets will be starting to nope-out of supersonic around that distance, so you would need something really beefy, like a .338 Lapua or even a .50 to be accurate. (A bullet will generally start tumbling when it drops sub-sonic.)

    Don’t mistake me: many bullets can and do travel past a mile regularly, especially depending on the shot angle. Yeah, they can still kill. I am referring to the uncertainty and inaccuracy at those ranges, especially if a bullet has lost a ton of speed.

    My main point is that long range sniper rifles are quite large caliber and generally require long heavy barrels. You aren’t going to swing one of those around without being noticed.

    The shot speed approximation is the easy part, believe it or not. Since the bullet must be a large caliber you can guess at about 200-300 grains for a “smaller” large caliber bullet, or between 650-900 grains for a larger one. (Maybe a few more, but I am sticking with a 338 or a 50.) Muzzle velocity is also going to be on the high end at between 2900fps and +3100fps for most all of them. The math is easy to work out with a common ballistics calculator by estimating the ballistic coefficient of available bullets in the category we are talking about. (Bullet speed at the target is the most important number to calculate.)

    Still, it’s not perfect math. If you look for a camera flash at an estimated time when a bullet was supposedly fired, you are probably going to find one, especially if you have a second or two of footage across multiple cameras.