Recent content by d.tran103

Okay thanks. My first answer was 1.5 however, it wasn't accepted. I'm thinking that the logarithm is using some weird value for g? I'll just ask my professor. Thanks again

Homework Statement Jane, looking for Tarzan, is running at top speed (5.5 m/s) and grabs a vine hanging 4.3 m vertically from a tall tree in the jungle. How high can she swing upward? Homework Equations Pe=mgh and Ke=1/2mv^2 The Attempt at a Solution Can someone tell me if I'm...

Hey, how do I determine whether or not points lie in a straight line? Is there a symbolic approach to determining so? Or do I need to spatially visualize it? For instance, A(0,-5,5), B(1,-2,4), C(3,4,2) does lie in a straight line according to my book. Thanks!

Okay thanks!

Hey, I'm going over series expansions and was wondering if someone could check my work and tell me if my work is correct. If not, could you explain it to me? I couldn't find any example like this problem in my book so I'm posting it online. Here it is, The closed form series expansion for...

Hey guys, I'm having trouble calculating the Ksp of this equation. I found an equation online but I don't understand it. I have Ksp=[Ca2+][IO3-]^2. I don't understnad how to use this formula? Thanks! The concentration of a saturated solution of PBI2 in water is 25ºC is 540...

or if I do: sum((10y^2)/(y^4+12),y,1,∞,1) it returns ∞ 10Ʃ(10y^2)/(y^4+12) y=1 without giving me the answer (even if I hit diamond).

Hey, I'm having trouble with plugging sum series into my Ti-89, and was wondering how to do it with things converging and going to infinity. I have the sums rounded to 3 decimal places that my professor gave me, however, I can't figure out how to get it from the calculator. For example I have...

Oh sorry, I meant to say -log(x) as in taking the -log(H3O+) (from the original ice table)

What is the pH of 0.15 M NH4Cl? Okay, I set up my ICE table, NH4 + H2O <---> H3O+ + NH3- I 0.15 M --- --- --- Δ -x --- +x +x E 0.15-x --- x x KbNH3-=1.8x10-5 So Kw=1.0e-14=Ka*Kb, so KaNH4=5.56e-10 So, Ka=[H3O+][A-]/[HA]...

Okay thanks!

Do I have to figure out which reactant will behave as the base or acid first? And would this be based off of strong/weak acids/bases?

Okay, I'm reviewing how to write reactions to determine which reactant should behave as the acid and which should behave as the base. I haven't seen this material in over a year and am actually trying to help someone out with a class. I know the ionic charge should balance on both sides...

Okay thanks, that makes sense now. But if I find that the limit is 0, then it can be convergent or divergent. How do I tell from there? inf. E 1/3n n=1 lim 1/3n = 0 n-->inf.

Determine whether or not the series is convergent or divergent. If it is convergent, find its sum. 1) 1/3 + 1/6 + 1/9 + 1/12 + 1/15 + ... inf. 2) E (n-1)/(3n-1) n=1 Okay, I'm having trouble with determining the convergence/divergence. My book states that, "If the series...