I can use ArcGis, however the 'data' is yet to be collected. ArcGis can actually perform slope calculation based on digital elevation models and trail line data, but it will not be very accurate vs on-the-ground measurments. I have yet to collect any on the ground data, and that is part of the...
Hi all.
I am tasked with quantifying hiking trail grades (percent grade) and their 'typical' grade.
I am not sure if 'typical' is really a math term, but my first inclination was that it equates to 'average.' However, I now think there are two ways to approach this with different results.
Is it...
A changing current in a transformer primary produces a changing magnetic field, which induces a voltage in the secondary (correct?), but if no circuits are closed on the secondary, there's no current in the secondary (and therefore primary as well). So how is this voltage induced?
And it wasn't intended to be my own theory, rather my own phrasing. Perhaps that could be missed. It is my way of learning. I was hoping for insights. Instead: delete. Hopefully some understand how that comes off, even if I'm the bad guy here. (Which I am and will be at this point no matter).
Sometimes in life people are offended by things. I am simply making an observation and offering my perspective-- one I know others share based on comments. But I understand that I will be viewed as an outsider casting stones on a culture, and so there is little benefit to come of this. Sorry...
I really appreciate the replies. That, in fact, is what i find helpful-- discussion and correction.
Simply shutting down/silencing those who have spoken scientifically inaccurate words runs counter to education.
Funny too, I consider educating science advancing science. And in no way do I...
Summary:: PF forums is afflicted with 'mentors' on power trips
Just sayin.
Power trips--shutting down discussion because it conflicts with some old farts internal monologue--doesn't advance science.
But I'm sure they feel important.
Thank you, this clears it up.
My focus on the transformer, I suppose, is because it's a real world situation (and the point of contention) and I cannot think of an equivalent scenario with a simple conductive circuit. By scenario I mean where there is a closed loop and then another closed loop...
Thanks anorlunda.
Let me clarify a bit more the principle I am getting at:
I understand that SWER's exists and that typical distribution systems are not relying on Earth return current. My question is really more about concept and this is an example to get at that.
So even with SWER, could the...
I am not sure if I should use the word 'current' or 'charge' but my question is whether, in a typical U.S. residential 120/240 split phase system, is the local transformer always the source to which current (charge?) must return? Or can it bypass and go direct to other PoCo elements/generators...
Yes M and m are factors, of course. Makes perfect sense and a bit of a duh moment there.
I was also heading where hmmm27 went in thinking about $$F={m}{a}$$ (or g instead of a if you want to be technical, sure o0)) to describe why without another force (air resistance) acceleration would be...
I came here thinking I knew something, then reading the thread actually confused me. That's good.
The OP's statement in post #7 is really interesting: "So why do 2 identical balloons fall at different speeds? The air resistance is identical."
It posits that the gravitational force must be...
But the rope tension is not 'divided,' it adds. Meaning with a given tension of 10lbs on the roope, when through a pulley, will add to 20lbs of supporting force.
As said before, the rope tension is (theoretically) constant throughout the system when going through pulley's. So it is not...
This is confusing to me. THis is from the distribution grid. How would one of the phase conductors from a 3-phase dist. grid be used as a primary neutral? I understand you could have a neutral on the secondary. Or are you positing that there's a transformer upstream doing some reconfiguration?
Perhaps someday. I have one in mind with possible access, but by and large not likely for me. Some may scoff but this is really just an exercise in concept for me, not serving any practical need.
I won't continue to post endless photos, but here's one last one with a clearer shot of the 'taps.'...