Given three vectors A = 2î – 39 – k, B = î- j+k , and C = 2î – 3j +5k: a) Determine A. B, AXB, A. (BXC), and AXB XC
b) Find a unit vector perpendicular to the plane of the vector
s
A and B.​

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

Consider the particle-in-a-box problem in 1d. a particle with mass m is confined to move freely between two hard walls situated at x = 0 and x = l. the potential energy function is given as (a) describe the boundary conditions that must be satisfied by the wavefunctions ψ(x) (such as energy eigenfunctions). (b) solve the schr¨odinger’s equation and by using the boundary conditions of part (a) find all energy eigenfunctions, ψn(x), and the corresponding energies, en. (c) what are the allowed values of the quantum number n above? how did you decide on that? (d) what is the de broglie wavelength for the ground state? (e) sketch a plot of the lowest 3 levels’ wavefunctions (ψn(x) vs x). don’t forget to mark the positions of the walls on the graphs. (f) in a transition between the energy levels above, which transition produces the longest wavelength λ for the emitted photon? what is the corresponding wavele

Velocity is a description of both speed and direction, therefore it - a vector - a force arrow - the same as acceleration - a magnitude