Aneglecting air resistance, a ball projected straight upward so it remains in the air for 10 seconds needs an initial speed of o 100 m/s. 60 m/s. 50 m/s 80 m/s. 110 m/s.

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

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

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?