Recent content by DaveE

OK, It's not a great sailboat, and it's not a great power boat. But it is suitable for it's purpose. Jack of all trades, master of none. Everyone knows this, it just takes one look. Don't #@%$ on other peoples boat choices, they may want different things than you do. They may have different...

I'm not sure what you mean by "a spike", the circuit oscillates chaotically, so everything is changing. But, generally, you won't get a current spike out of an inductor. The negative resistance current is proportional to the voltage on C1, which also doesn't change quickly. OTOH, the resistor...

https://www.khanacademy.org/math/ap-calculus-bc/bc-differential-equations-new/bc-7-1/v/differential-equation-introduction?

Simulations can be very valuable when used appropriately. That's the problem; people think it's an easy answer to every circuit question. They are not. They are a tool that can help an engineer that knows the subject matter and knows their limitations. I would break down their appropriate use...

In the ideal circuit model: The only element that can dissipate energy is the resistor. The negative resistor (Chua diode) can only produce energy. These must be in balance on average for the oscillation be bounded and sustain itself. But clearly they both vary chaotically throughout the...

If y'all think repeating your position over and over, and over and over, and... will convince the other guy, you may want to focus a bit more on communication and negotiation skills than physics. Let it go. This problem is solved. You don't have to be more right than the other guy.

This reminds me of a similar story about the old 12 meter America's Cup yachts. A classic yacht designer designed a hull with a fine bow and rounded stern for the race. The yacht club hired a Caltech physicist*, who did aerodynamic work among other things, to help. He said it looked like a...

Yes, but the information is out there. It's not that hard to find, but it is hard to understand. Fluid dynamics is a complex subject. Sailors want easy answers, but it's just not an easy subject. You can start with this:

Think of a fin keel more like an airplane wing. It generates lift in exactly the same way. So to some extent it isn't just resisting drift to leeward but pulling the boat to windward. Fins make more efficient lifting devices. So, "why do airplanes have long wings?" is a similar question. Lift...

Probably with Thermo-electric coolers (TECs) based on the Peltier effect. You can google these keywords to learn more.

Unless you actually had to use them. The 2nd worst way to program a computer.

Enough. If they are desiccated and distributed in the HVAC system. But there's little point in speculation. There are several good possibilities that experts can probably sort out. But that will take time, which apparently isn't sufficient in the SM/News environment today. What needs to happen...

"Tinkerer is spelled T-I-N-K-E-R-E-R" proof that some AI has no "I". Perhaps the most useless, redundant sentence ever written? IDK. Welcome to PF from a fellow tinkerer. AI is not encouraged here as a substitute for what YOU think, what YOU want to say, what YOU want to ask. Say it yourself...