Recent content by diffrac

Hi all, I'm learning how to solve redox equations. I found the algebraic method to solve equations such as this one: Fe^{2+} + Cr_{2}O_{7}^{2-} +H^{+}\rightarrow Fe^{3+} + Cr^{3+} + H_{2}0 and i was able to solve it. What I don't see is how to use that algebraic method to solve an...

Hey great! I finally got it right this time. It was one or two of those exponent rules that i tripped over, but i think i got it cleared up now. So thank you so much for your help and details Mark44!

Oh right...classic mistake. Although i did try it again and got the wrong answer. Could i ask you to show me your steps to the result?

ok, well i applied e^ to the whole thing which gave me: -(m1-m2)g + (c1+c2)v e^\frac{1}{c1+c2} = e^\frac{t}{m1+m2} -(m1-m2)g e^\frac{1}{c1+c2}. I divided that by (m1-m2)g, and then 'simplified' that by eliminating the -e^(\frac{1}{c1+c2}) left on both sides of the equation. that...

Hello, Could someone please help me simplify the equation: \frac{-1}{(c1+c2)} \cdot ln [(m1-m2)g-(c1+c2)v] = \frac{t}{(m1+m2)} - \frac{1}{(c1+c2)} \cdot ln[(m1-m2)g] (where c1, c2, m1, m2, g, are constants) so as to get: v = \frac{(m1-m2)g}{(c1+c2)} \cdot [ 1 - exp[\frac{-(c1+c2)t...

Hello, I am currently a senior in a Swiss high school (french region) and i have applied to five University of Californias (UCSB, UCSC, UCSD, UCLA, UCI, UC Davis) and to the EPFL in Lausanne for physics. I was wondering if anybody could give me some insight on the differences between them...

So if i say i want the cycloid to pass through the point x0=1 and y0=2 and i resolve the parametric equations until i get f(θ)=2θ-2"sin" θ+"cos" θ-1 and then i replace random values into the function until i get one that will make it equal zero, then k equals it as well (k≅2.193)...and so if i...

it's actually in the parametric equations: x= (k^2 (θ-"sin" θ))/2 and y=(k^2 (1-"cos" θ))/2 for the position in function of time of the particle as it slides along the curve (i think).

Hello! I am currently studying the brachistochrone problem in the Boyce-Di Prima D. E. book. While following their indications on the resolution of the problem for the curve as it passes through the point (x0; y0), i find myself wondering what the constant k really means (physically...