14 more posts in this thread. [Missing image file: 00000615.jpg]
Why the fuck do unmyelinated axons with larger diameters conduct action potentials faster?
I can't wrap my head around it. Sure, if you have a larger diameter, then that means more overall membrane, which means more ion channels, allowing a larger amount of ions to cross the membrane at any one time, increasing the current, which makes the membrane reach the threshold potential faster.
BUT CONDUCTANCE IS FUCKING LATERAL, isn't it? I mean, its along the membrane. An axon depolarises depending on the activity of the ion channels directly adjacent to it. So wouldn't it be a case of ion channel density that increases conduction velocity?
Not homework, not asking /sci/ to do shit for me, just reading up on this shit and can't seem to understand this little part right here.
7 more posts in this thread. [Missing image file: wrapping_paper-binary.jpg]
I have a test today on binary operations, everything seems simple enough with addition, multiplication and division, however when I have to subtract without changing the number to be subtracted to a twos compliment, I run into issues.
I understand the borrowing technique, and it is easy enough when there is a one to borrow on the immediate column to the left, however, I am really unclear on the mechanics when you have to borrow from a further place to the left, what happens to all the numbers inbetween?
for example, 10001- 11, so its 1 - 1 first, easy, 0; then its 0-1, so you have to borrow, but what happens to all these zeroes inbetween? do I just ignore them and take the one from the very left and make the zero im working with 10 (2) ? i have a feeling this is way wrong... any help?
6 more posts in this thread. [Missing image file: Schrodinger.jpg]
I have a question pertaining to skipping college classes.
I've done an immense amount of independent studies outside of the AP curriculum. This includes linear algebra, differential equations, classical mechanics, and introductory quantum mechanics (not quite finished, still in progress).
When I say independent study, I mean that I purchased a book, bought all of the material that comes with it, and did all work and exams (passing).
Is there college tests I can take so that I can skip the college courses (outside of the AP curriculum) I have already rigorously studied? previous AP exam scores: 5 5's, 3 4's, and 1 3.
0 more posts in this thread. [Missing image file: whycanti.png]
So I don't really want anyone to do my homework for me, I'm gonna work it out on my own anyway and I'm certainly not asking anyone to write out the proof.
Anyway, I've got this question on my abstract algebra homework:
Prove that the dihedral group of order 6 does not have a subgroup of order 4.
And I don't really get the concept here. What, exactly, is the dihedral group of order 6? I know D4 is the symmetry lines of a square, does that mean D6 is just gonna be all the symmetry lines of a hexagon? And how would I go about proving this, like my gut response is just to say that D4 includes diagonal symmetry that D6 doesn't have but that seems way too simple, would a subgroup of order 4 have to be D4 or could it just be any group or symmetries with 6 elements.
Or wait, do I have this completely wrong and D6 is a triangle's symmetries?
Sorry to spam with homework, I haven't bought the textbook yet and really just do not get what this question is asking, I'd appreciate if anyone could clarify, I don't get this shit at all.