# Recent content by ahhppull

Ok...Thanks!
2. ### Particle in a Box

I got the answer now, but by changing my calculator to radians when calculating sin(2n∏x/L). Am I suppose to use radian instead of degrees?
3. ### Particle in a Box

I still don't understand. I may have wrote something wrong. The part that you highlighted should be: (L/n∏)
4. ### Particle in a Box

Homework Statement What is the probability, P, of locating a particle between x = 0 (the left-hand end of a box) and x = 0.2 nm in its lowest energy state in a box of length 1.0 nm? Homework Equations Probability = ∫ψ2dx ψ = (2/L)1/2sin(n∏x) The Attempt at a Solution ψ2 =...
5. ### Harmonic Oscillator eigenvalue

Homework Statement Write down the v=1 eigenfunction for the harmonic oscillator. Substitute this eigenfunction into the Schrodinger equation and show that the eigenvalue is (3/2)hν. Homework Equations The Attempt at a Solution I'm not really sure on how to to this, but heres...
6. ### Probability of finding a particle in a box

Homework Statement Consider ψ (x) for a particle in a box: ψn(x) = (2/L)1/2sin(n∏x/L) Calculate the probability of finding the particle in the middle half of the box (i.e., L/4 ≤ x ≤ 3L/4). Also, using this solution show that as ''n'' goes to infinity you get the classical solution of...
7. ### Absorbance of a solution

Not sure if correct but heres what I did to find the concentration. 5.49 ppm = 5.49 micrograms/mL = 0.00549 grams/L 0.00549 grams/L /(55.845 grams/mole) = 0.000106 M 0.000106 M * 5 mL / 50 mL = 0.0000106 M EDIT : Also I just realized that the molar absorptivity of FeSCN is not given in the...
8. ### Absorbance of a solution

Homework Statement 2. A 5.00 mL aliquot of a solution that contains 5.94 ppm iron (III) is treated with an appropriate excess of KSCN and is diluted to 50.0 mL.What is the absorbance of the resulting solution at 580 nm in 2.50-cm cell? Homework Equations The Attempt at a Solution...
9. ### Green's Theorem to evaluate the line integral

Homework Statement Use Green's Theorem to evaluate the line integral of the vector field F along the given positively oriented curve C. F(x,y) = <sin(x^3) +x^2(y), 3xy-(x)(y^2)+e^(y^2)> and C is the boundary of the region enclosed by the semicircle y = √(4-x^2) and the x-axis. Homework...
10. ### Determine whether F is conservative

I got it now :)
11. ### Determine whether F is conservative

Homework Statement F(x,y,z) = <2xy + ze^xz, x^2 +ze^yz, xe^xz + ye^yz + 2z> Homework Equations The Attempt at a Solutionf I know how to find the partial of F(x,y) but I don't know how to do it for F(x,y,z). How do I do this?
12. ### Line Integral

Honestly, I have no idea what to do, but here what I did. From (0,0) to (2,1) r(t) = (1-t)<0,0> + t<2,1> r(t) = <2t,t> x=2t y=t I found that the integral is from 0 to 1. dx/dt = 2 dy/dt = 1 ∫(x+2y)dx+(x^2)dy Then I set x as 2t and y as t into the equation...
13. ### Line Integral

Homework Statement Evaluate the line integral ∫(x+2y)dx+(x^2)dy, where C consists of the line segments from (0,0) to (2,1) and (2,1) to (3,0) Homework Equations The Attempt at a Solution I'm unsure of what to do. I did (1-t)r0 + t(r1) for (0,0) to (2,1) and (2,1) to (3,0). I...
14. ### Change of Variable in multiple Integrals

So I set 1 = 3u -2v and 2 = u+v. Then, I do 2-v=u and substitute u into the first equation? I get (1,1)
15. ### Change of Variable in multiple Integrals

I don't understand. How would I do this then?