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Exercise Set 2

Q1. Obtain the eigenvalues and eigenvectors of a 10 by 10 random symmetric matrix. (Hint: generate a random 10 by 10 random general (possibly asymmetric) matrix and symmetrise it by a number of approaches e.g. add it to its transpose and divide by 2). Check the eigenvectors for orthonormality.

Q2. Find the Laplace Transforms of tex2html_wrap_inline53 , tex2html_wrap_inline55 , tex2html_wrap_inline57 and tex2html_wrap_inline59 .

Q3. Write a Mathematica function that yield the available energy levels below some maximum energy for a system of s quantum harmonic oscillators with different energy gaps tex2html_wrap_inline63 .

Q4. Given a reversible chemical reaction system tex2html_wrap_inline65 :

(i) Solve this system in general for the time dependence of concentrations using Mathematica via matrix methods.

(ii) Solve the same problem by direct integration.

(iii) Give the specific solution for an initial concentration of A of 1 unit and that of B and C is zero.

Q5. Write a Mathematica notebook to solve the 1D Schrödinger equation for an arbitrary polynomial in x over the domain 0<x<L (assume infinite potential walls outside this domain.



Harold Schranz
Tue Jul 1 18:54:43 EST 1997