Asmall but dense 2.0-kg stone is attached to one end of a very light rod that is 1.2 m long. the other end of the rod is attached to a frictionless pivot. the rod is raised until it is vertical, with the stone above the pivot. the rod is released and the stone moves in a vertical circle with no air resistance. what is the tension in the rod as the stone moves through the bottom of the circle? (a) 20 n (b) 40 n (c) 60 n (d) 80 n (e) 100 n

Using the given data table, calculate the acceleration of the skateboarder. you can use either form of the equation below?

Why cooking gas has a typical smell

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