Recent content by Theseus

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    Where can I find free physics video lectures?

    Thanks, great resource. I haven't touched Algebra through Calculus since college (a while ago). After about a week and a half, I've reviewed that whole area.
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    Music Crafting Mood in Music: Techniques and Tips for Composers

    Hi Tyler When you record your music in Musescore do you 1) play the part or do you 2) enter the notes on the staff? If 2), each note will fall exactly on the beat with the same length and same volume unless you manipulate it. You mention that you can play with feeling. I would suggest you...
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    Time Travel: What are the Theories & Factors?

    There has been much discussion of time travel, but I haven't yet found an answer to a question I have. That is, what are the specific theories or factors that allow for the possibility of time travel? The issue has been discussed and debated many times on this forum and I'm not so much...
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    What is the upper limit of harmonics in standing waves?

    OK, if I have the decimal point in the right place, that would put the upper limit at about 4.8 GHz which is some 25 octaves above middle C. I guess there's a lot going on up there that we don't hear. I think the equivalent in the EMF spectrum would be the HF radio band. I wonder, do sound...
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    What is the upper limit of harmonics in standing waves?

    Are we talking atoms of "air"? Any idea what the frequency would be at that level? Also if we look at, say, a sine wave for alternating current, would we use the space between electrons as opposed to atoms to set the maximum frequency? Or is this a whole other subject? Coming from a practical...
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    What is the upper limit of harmonics in standing waves?

    As an example of a standing wave we have a musical tone, which is a combination of a fundamental pitch and a series of harmonics. Is there anything to suggest that additional harmonics don't continue up far beyond the range of hearing, perhaps even approaching infinity? Or is there some point...
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    How do you evaluate product claims?

    I have a confession to make ... I don't actually have an Aunt Sally. I do, however, have an aunt although to my knowledge, she has never tried the Magic Bracelet. Just to be clear, this was never a point I tried to make.
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    How do you evaluate product claims?

    Thanks, there is a lot of good information here. It may not tell you that the thing works but it does tell you something. As you say, you do not know whether it was the bracelet, the placebo effect, etc. Someone weighing the purchase of a bracelet is most likely experiencing pain for which...
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    How do you evaluate product claims?

    Yes, I wouldn't want to perpetuate a scam. But if Aunt Sally used the bracelet and it eased her joint pain I probably wouldn't consider it a scam. A few more points, and I'm not arguing with you here, just trying to get more information: Should we consider all things a scam until proven...
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    How do you evaluate product claims?

    I think I would take more or less the same approach though with a product as simple and inexpensive as this I might just skip the studies and try it. Whether it worked or not would bear far more weight than the results of any studies. Of course this applies strictly to being a consumer...
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    How do you evaluate product claims?

    OK, I'm not going to tout the wonders of a magnetic bracelet. Rather, this is a survey on scientific evaluation and what you consider is valid evidence. It could apply to lots of things. I just happened to see one of those commercials where you can get your joint pains to go away for $19.95 and...
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    Dream Out of Time: My Surprising Experience with a Clock

    For sure it was a one time thing, I can't claim any special ability there. I'm not sure what you mean by an "infallible memory" as an explanation, can you amplify this?
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    Dream Out of Time: My Surprising Experience with a Clock

    Lots of interesting things to chew on: Coincidence It's easy to casually dismiss something as random, not inspect it and ignore it. I have had the experience of waking up just before the alarm goes off and didn't think much of it. This is different. The incident was some 8 hours after the dream...
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    Dream Out of Time: My Surprising Experience with a Clock

    I had a dream that goes like this: I was involved in some activity or other and suddenly I looked up at a clock on the wall and saw it was 3:20 and I exclaimed to myself “Oh no, I’m late for my guitar lesson!”. (Note: I was giving guitar lessons at the time and actually did have one scheduled...
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    Help with Lorentz Transformation

    I wanted to let you all know that each one of your responses was very helpful. I made it all the way to (7) and I'm currently slogging through that. Next time I get fully stuck I'll know who to ask.
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