Can the Momentum of an Electron Be Determined from Its Wavefunction?

[Sasuke]

wavefunction/momentum confusion

Homework Statement

Given a wavefunction $$\Psi$$=Asin(cx) of an electron can i find it's momentum?

Homework Equations

Thats what i don't know.

The Attempt at a Solution

Wave function squared is the probability if finding the particle. So I'm given the probability of finding a particle in space how do i find momentum when momentum is dependent on time but the given wavefunction is not?

 

[gabbagabbahey]

What makes you think that the electron even has a definite momentum? In quantum mechanics, a wavefunction can be in a superposition of momentum eigenstates, and if the momentum is measured, each momentum eigenvalue will have some probability of being observed.

What does the question really say? (word for word)