A wave is produced at one end of a rope the adjacent figure represents the shape of the rope at a certain instant t. A;B;C;D;E and F are six points vibrating on the rope
1- Name 2 points to determine the period and the wavelength
2- If A needs 0.02 sec to complete one vibration and distance between B and E is 4cm
A) what do, 0.02 sec and 4cm represent for the wave?
b) deduce the speed of the wave
C) calculate the distance between A and E

The consumption of fossil fuels could be

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

Which boundary is associated with the building of the himalaya mountains? convergent transform divergent hot spot