Homework Statement
Given the dispersion equation of an electron in an electric field:
Homework Equations
a) calculate the velocity of the electron if k = π/a
b) If the electric field E is applied in the -x direction, derive the time
dependence of k for an electron initially at k...
Hi,
I need to make a propeller using either soda bottle plastic or cardstock. I think I can come up with a mechanism to spin it with a rubber band, but, I need an efficient propeller that creates enough power to move the car I am building. Any ideas/possible designs?