Recent content by DaveE

How would you know? You never see the counterfactual. Maybe one of your neighbors is a genius but is lazy and content. I've worked with some truly brilliant people at the laser company, you'll never see their names in the news. They're not trying to win a Nobel prize, they're on a different path.

I suspect it's a disconnect between what the physics community thinks "correlation" actually means versus the general public. It's not about age, it's about vocabulary and education. Better questions get better answers. In the context of a vague question, a vague understanding of the terms isn't...

Anyway, Yes. But I wouldn't let that stop anyone. There are many other factors involved. https://www.researchgate.net/publication/222403422_Intelligence_and_Educational_Achievement

What an odd question. Perhaps you could be more specific? 1) STEM is not a measurement. Perhaps you need a performance metric? Or are you just counting some (undefined) count of participation? What do you think STEM is and how is it measured? 2) Yes, many things can have some correlation with...

Most zoonotic tickborne disease in humans comes from blacklegged ticks (deer ticks), not from dog ticks (RMSF is the biggest exception). Granted they could bite or hitchhike on your pet which isn't insignificant in some areas. But you won't eradicate them by treating dogs or cats. Still, you'll...

One of the things you'll need to learn in the real world, after you leave school, is that there usually is no answer key, and there often isn't anyone to ask. Either they don't know how to solve it, or they are too busy doing their own work. They didn't hire you to ask them for the answers, they...

Yes, so there is no unique answer for the purely vertical motion of the particle. It will hit the wheel at the same height it left without regard to the velocity. I suggest removing this trivial solution. Anyway, just to clarify. "at the same height" has nothing to do with the same location on...

Wait. Are you disrespecting the 100pW of charging power my previous data clearly demonstrated (at least once, anyway)? :wink: Yea, maybe a poor choice of words. I'd bet there are other, better, ways to collect picowatts.

Not precisely true. While larger in electrolytics, this is a well known effect in HV film and oil caps, which is why they are always stored with the terminals shorted. https://en.wikipedia.org/wiki/Dielectric_absorption#Measurement

This is a DC effect. 60Hz energy harvesting would require a rectifier of some sort (like dissimilar metals?). Yet dielectric absorption is evident in essentially all capacitors with a dielectric. This includes simple ceramic, paper/oil, or film capacitors which can have virtually identical metal...

No worries. You may find this article interesting, I did. https://www.physicsforums.com/insights/wont-look-new-theory/

My thoughts are that you should read the forum rules you agreed to. In particular the ones about espousing personal theories and the use of AI. You might be in the wrong place. We focus on mainstream published science here.

Sorry, that wasn't my intent. My point is that it can be very hard to do a good job on a modern PCBA without good tools. The "Radio Shack" type of soldering iron that plugs directly into the wall, isn't temperature regulated, and has a big tip that isn't treated well or ever replaced is really...

The USB-C charging rate will be the least of the power supply capacity and the PCs capacity. There should be documentation somewhere for your PC that says what it can handle. The fact that they still use a separate power connector suggests a lower USB rate...

In my experience the ratio of people that really know how to solder on PCBAs to those that think they know how is a relatively small number. This is exacerbated by their lack of good tools. Personally, I always preferred Metcal, but YMMV. Still, if you can get the part, and you'll scrap the...