PLS HELP ASAP I WILL GIVE BRAINLIEST I RLLY RLLY NEED THIS :( 13. A tee-shirt cannon is used to launch tee-shirts into a crowd. If one shirt is launched with
an initial velocity of 24.4 m/s, at an angle of 19.5° above horizontal, what will be the x-
and y-components of the final velocity vector?

14. If a projectile is launched upward with a speed of 7.44 m/s, and at an angle of 40.1°
above horizontal, what is the hang time of this projectile?

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 changes of state do the labels represent? a: b: c:

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is