Select the correct answer.
What is the perihelion?
A.
It is the point of a planet's orbit that is furthest away from the star it orbits.
B.
It is the distance between the closest natural satellite and the planet it orbits.
C.
It is the distance between an asteroid and the star it orbits.
D.
It is the point of an orbit at which a planet is closest to the star it orbits.

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

Orange juice has a lower or higher viscosity than chocolate syrup

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m