Recent content by That Neuron

Lately, I've done a lot of research on this and m currently building a portable methanol micro reactor targeting portable electronics. If you're willing to use a hydrocarbon fuel (2-3.something Wh per ml depending on the efficiency) then Direct Methanol/Ethanol or Direct Borohydride Fuel Cells...

Hi Orion! I've actually recently been starting to build a micro-DMFC stack for portable electronics of my own. From my understanding, each cell, when no current is moving through an external circuit, produces a given OCP (Open Circuit Potential) that is a little less than its theoretical...

Hi All! Haven't been here for some time, the changes are looking good! Anyway, formalities aside, I am having serious problems sourcing and implementing a suitable stainless steel (Grade: 304; thickness: 0.3mm) substrate for my etching process. I'm currently working on developing a...

Oh, I see the mistake in my logic, I was looking at the cartesian equation being ambiguous as a result of the vector equation, I suppose that the vector equation is ambiguous until we add the actual vector, then we get a unique equation for the plane. Don't know what I was thinking. There's...

Right, BUT my book says that it is a definition (Or at least says that it determines a single plane) which is weird. Also, how can we derive the standard cartesian equation a(x-x0) + b(y-y0) + c(z-z0) from the vector equation?

Just curious about a certain facet of the vector description of a plane. My query is as to why it is defined as n • (r-r0) = 0. Great, that's because any two vectors with a dot product of 0 must be orthogonal to each other and if we have a point on a infinite plane with an associated vector we...

Okay, I would suggest is a power tower derivation in conjunction with L'Hospital's rule. If we derive 8x we get ln8 (ex). If we derive xx we get (ex)lnx, if we take u as equal to ex and say that u approaches infinity as x approaches infinity we end up with lim u → ∞ ln8 (u/(uln2u), if we use...

Homework Statement The problem contained five answer choices, of which I the answerer was to find one that fit the criteria of the question. The question was: "Which series of the following terms would be convergent?". It listed five series, The answer was this term: 1 + (-1)n / n. Homework...

That's exactly what I seem to have done, you see I thought that the change in change of the direction of the object's momentum would be proportional to it's velocity. I now understand how the individual second derivatives of x(t) and y(t) respectively determine the rate of change of rate with...

Okay! Earlier today I was thinking about potential energy and how it is related to an orbiting object, O, around a centre, C, from which force emanates if the object O is traveling at radius r from this centre, we conclude that the force given by the change in direction must be equal to the...

Oh, no y is a function of t! Not the height! I actually think that I found the correct function simply by playing around with the constant k. Let me revisit this!

Okay, this is a really simple question, so to anyone looking for some extraordinarily complex differential equation question turn away now, or be blinded by boredom. My query is rooted in a question I had about building a water clock... so seemingly relevant to Differentials, I know...

I've just finished it, well, the third edition anyways. I like it, it is an illustrious (not in the figurative sense) book, it explains things visually, which I find easily digestible. The only problem which I have with the actual book is that it doesn't really delve into much depth, for...

But wouldn't a function defined as (r, g(r) ) not be an actual function since f(\theta) = f(\theta + 2 \pi ) , so for every r there would be a myriad of possible values of \theta that would be solutions. Just as we can only define inverse trigonometric (sine for example) functions on a...

I'm sorry, but did anyone else notice the "Christian Mingle" ad right next to the original thread starter post. If not, I took a grab of it in case anyone wants a good laugh.