Recent content by s8wardwe

Homework Statement For a given wave function Psi(x,t)=Aexp^-(x/a)^2*exp^-iwt*sin(kx) find the expectation value of the linear momentum. Homework Equations <p>=integral(-inf,inf) psi* p^ psi dx p^=-ih(bar) d/dx sin x = (exp ix - exp -ix)/2i cos x = (exp ix + exp -ix)/2 The Attempt...

I believe we need to find out how much energy it would take to go from n to n-1. So find the energy at E(n) and subtract E(n-1). See if that gives you something more reasonable.

Try finding out what n is using the physical characteristics of the Earth.

When we have to case of a uniform electric field, it means that the field is constant in a region of space. In the definition of the above electric field, what happens to the electric field as r increases and decreases.

Check your unit conversions. I believe your error exists there. Remember Force is mass times the acceleration due to gravity. This mass you will need to find the kinetic energy.

Homework Statement I am having trouble solving this problem. From an analysis of the behavior of a general second-rank tensor under 90 degree and 180 degree rotations about the coordinate axes, show that an isotropic second-rank tensor in 3-D space must be a multiplier of delta ij...