Recent content by Rachael_Victoria

  1. R

    Integration by Parts of <C> i just cannot do

    Thank you, and you're right, i forgot to type the pi in the denominator for the answer.
  2. R

    Integration by Parts of <C> i just cannot do

    Can anyone outline, and this is a rather large request, the step by step integration by parts for <C>? This is not a homework question but more something i need to be able to do on tuesday for my final, and have been trying to do for two days.
  3. R

    Integration of X^2 exp(-aX^2) from 0 to infinity

    Hey can someone tell me the value of the integral of X^2 exp (-aX^2) dx from zero to infinity. I have the general solution from a table of integrals but since the upper limit is infinity, I can't really plug these numbers in. Can't find it in a table of integrals anywhere? If anyone has the...
  4. R

    Pressure, Volume, Temperature, etc.

    Further Questions Pressure, Temp Volume etc Thanks for you quick response, Ok so I looked back in my text and it specifically defines Dalton's Law as Ptotal=[ntotalRT/V] where ntotal is the total number of moles of gas present. the molar ratio is defined as Xk=nk/ntotal=Pk/Ptotal. I would...
  5. R

    Pressure, Volume, Temperature, etc.

    Ok so I am doing this problem and it is making me insane. The problem states that you have a container, the container has a partition and in compartment A you have an ideal gas at 5 atm and 400K. In compartment B you have another ideal gas at 8 atm and 400K. The partition is removed and the...
  6. R

    Perturbation and Variational Theory

    Ok so I am trying to expand my understanding of these two concepts. Here is what I understand so far. There are very few Schrodinger Equations that are exactly solvable Both Theories are used to approximate a solution Perturbation Theory utilizes a similar function with a known solution and...
  7. R

    Help with QM harmonic Oscillator Question

    WOW, thank you, i seriously do not have the math skills to pull that off. thanks for taking the time.
  8. R

    Help with QM harmonic Oscillator Question

    right but to get v i would have to integrate dv, which brings me back to integrating exp(-2ax^2).
  9. R

    Help with QM harmonic Oscillator Question

    The formula they gave us to find the normalization constant for a QM harmonic oscillator is Nv=((1/pi)^1/2(1/((2^v)v!)) where v is the wavenumber if that is any consolation. I am not interested in math thoroughly enough to lose any sleep over how you integrate exp(-ax^2) but i know some people...
  10. R

    Help with QM harmonic Oscillator Question

    Ok so I found a formula Which gives you the normalization constant for the QM harmonic Oscillator. New question. How do you calculate the uncertainty in position for a QM harmonic oscillator?
  11. R

    Help with QM harmonic Oscillator Question

    Hey thanks for your quick response, I tried integration by parts, the only problem that i have with it is that whether i assign exp(-ax^2) to dv or u i end up having to do the integral of exp(-ax^2). Cause you take the derivative for du and you get (-4ax)exp(-2ax^2). use it as dv and you still...
  12. R

    Help with QM harmonic Oscillator Question

    Ok so i have been instructed to normalize N*x*exp(-ax^2), so i squared the function and trying to take the integral. I am a) assuming that the integration should run from the negative value of the amplitude or -A to the positive value of the Amplitude of A, i have a formula for A. My assumption...
  13. R

    Calculating De Broglie Wavelength of a 100g Ball

    Ok so my homework question says find the de broglie wavelength of a 100 gram ball traveling at 100 miles per hour. So do a little dimensional analysis and 100 mph is 44.704 m/s and since the de broglie wavelength is found with lamda=h/p and p=mv then I am good to go, I get 1.48 x 10^(-24)...
  14. R

    Probability Distribution and Constants

    I see what you are saying, they way our book presents it is that C is equal to 1 over the equation. So we got the entire C=1/[P(Xi)] thing. Here is the exact question as it is worded in my book: "...we shall find that the probability of a system occupying an energy state with energy E is...
Back
Top