Homework Statement
Show that the general solutions to the equations:
(\frac{d^2}{dr^2}+\frac{1}{r})(\frac{d^2f_1}{dr^2} + \frac{1}{r}\frac{df_1}{dr}) = 0
(\frac{d^2}{dr^2}+\frac{1}{r}\frac{d}{dr} -\frac{4}{r^2})(\frac{d^2f_2}{dr^2}+\frac{1}{r}\frac{df_2}{dr}-\frac{4f_2}{r^2})=0
are...
This is a question relating to Problem 7-1 in Modern Physics (5th ed.) by Tipler and Llewellyn. Find the energies E311, E222, E321 and construct an energy-level diagram for the three-dimensional cubic well that includes the third, fourth, and fifth excited states.
How are these states...
ah well I've got the solution and the concept. drawing venn diagrams certainly does help. i spent last night focusing on a purely graphical approach instead of a symbolic-computation approach on a different probability problem and solved it successfully. thank you for your guidance, Dick.
(I'll denote complements like this: c{A} for complement of A)
B is continuing to vex me. From the problem statement, I'm interpreting this: P(c{A}B U Ac{B}) = P(c{A}B) + P(Ac{B}) = 0.90; that is, if one is not available the contractor still has a 90% chance of being able to hire the other...
Homework Statement
A contractor has two subcontractors for his excavation work. Experience shows that in 60% of the time, subcontractor A was available to do a job, whereas subcontractor B was available 80% of the time. Also, the contractor is able to get at least one of these two...