Apaper airplane is thrown to the north from the top of a cliff with a speed of 2 km/h. the paper airplane land 15 minutes (0.25 hours) later. how far from the cliff did the paper airplane land? a. 0.25 km to the northb. 0.5 km to the northc. 0.7 km to the noth d. 1.5 km to the north

Why do electron microscopes have higher resolving power than light microscopes?

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

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves