DaveE's latest activity
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I think you're right. The slope prevents certain pencils from being touched. -
No, I did not. Sorry for the spoiler bar. By the way, there is another solution which can also be found by using Google. In my...
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DaveE reacted to Lnewqban's post in the thread Wood/Glass/Metal DIY lifting concrete blocks with a lever and a grabber with
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See some solutions here: https://pavetool.com/collections/clamps-wall-paver-slab -
DaveE replied to the thread Wood/Glass/Metal DIY lifting concrete blocks with a lever and a grabber.The mold for those blocks is conical (or pyramidal?). So grabbing solutions need to grab well. I think you want your wedges to be very...
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DaveE reacted to Baluncore's post in the thread Weird near-field phenomenon I get in my EM simulation with Like.
The group velocity propagates at the speed of light. The phase velocity moves at between the speed of light and infinity. Consider a...
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Is it? Consider the two configurations 1 and 2 below: Anthropomorphizing the scale, it can only "see" (respond to) what's inside the...
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Is that not also true of the two alternate scenarios I described in Post #7? Do you honestly believe that when you hang 3 lb of bananas...
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DaveE replied to the thread B Six Pencil Puzzle.Unsharpened pencils (like cigarettes), I presume.
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DaveE reacted to DaveC426913's post in the thread Wood/Glass/Metal DIY lifting concrete blocks with a lever and a grabber with Like.
Oh I see what you're illustrating. Drop a dowel in the hole, just a little smaller than the hole's diameter. Wedge in a shim or two...
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DaveE replied to the thread I Geometry problem of interest with a 3-4-5 triangle.I got to the video on Facebook by clicking "Video on Facebook".
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DaveE replied to the thread Wood/Glass/Metal DIY lifting concrete blocks with a lever and a grabber.Or some sort of wedgy thing you can cobble together from wood scraps. Expect it to slip at some point, just to be safe.
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DaveE reacted to Rive's post in the thread Wood/Glass/Metal DIY lifting concrete blocks with a lever and a grabber with Like.
There is this kind of self-locking thing...
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DaveE reacted to Andy Resnick's post in the thread A When should I analyze optical problems using ray tracing vs. wavefront analysis? with Like.
Thanks, that's helpful. I guess I don't understand why you think ray tracing does not give valid results; ray tracing through GRIN...
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It appears in Paul G. Hewitt's famous "Next Time Questions". In the instructor's guide, which accompanies his Conceptual Physics...
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DaveE replied to the thread A When should I analyze optical problems using ray tracing vs. wavefront analysis?.https://courses.washington.edu/me557/reading/geometric_optics_1.pdf
