Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #1 20060117 00:57:29
Concentration of brine in coolingHi, my first post, and i need help with some applications of calculus to physics Last edited by jacs (20060117 01:05:35) #2 20060117 03:11:27
Re: Concentration of brine in coolingYou use a different method for solving differential equations than I'm used to, and quite an awkward one at that. See if you can follow this, and if you want, I can try to find the error in your steps. Integrate both sides "In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..." #3 20060117 08:51:00
Re: Concentration of brine in coolingNice work, Ricky!
And, of course, the 100e^{0.03t} term decreases with t, so it should be added. "The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  Leon M. Lederman #4 20060117 10:42:37
Re: Concentration of brine in coolingthank you thankyou thankyou I see it now.... i had the negative log and so cheated assuming that the 3Q was 300 instead of 900 (which i secretly knew was wrong...lol....but coudnt get rid of negative log so sort fudged the results) 