Recent content by shrew

Thanks, this was the type of confirmation I needed. :) I understand now, and this may be closed.

I've memorized the following: pH<pka, then acidic form pH>pka, then basic form And I'm guessing that pH=pka means neutral. However, my instincts tell me it would be the opposite. Take NH3, ammonia, with a pKa of around 40. And then there's NH2-, which from a google search, has an...

I looked it up online, and read that the two batteries in parallel should have the same voltage then... so then my mistake was thinking that their "same" voltage was the sum of them (2emf), when they really just had the same voltage that was indicated (1 emf). I think I can memorize this by...

I know that in series, voltage is split around and shared between resistors, whereas the current stays the same. In parallel, I'm thinking of it as analogous and opposite: current is split around, and voltage stays the same. So if in a series, you calculate a current, and all the resistors...

Thanks for noticing that I meant circuit B. Resistors in parallel, like these, must have the same voltage yet do not necessarily have the same current. However, these resistors have the same resistance (R1), and they have the same voltage, which I believe to be 2ε. So there currents should...

Homework Statement http://session.masteringphysics.com/problemAsset/1003291/40/15092_a.jpg In previous parts of this problem, I solved that the current travels counterclockwise, and that I_A = \frac{2{\cal{E}}}{R_{2}+2R_{1}} . Homework Equations V= IR R[series,total] = (1/R1 + 1/R2 + 1/R3...