Which best describes Lenny's error? Lenny wrote the steps he used to find the mass of an
object with 400 J of energy moving at a velocity of 8
m/s.
1. Find the square of 8 m/s, which is 64 m²/s2.
2. Divide kinetic energy, 400 J, by 64 m²/s2, which is
6.25 J per m²/s2
3. Divide 6.25 J per m²/s2 by 2 to get a mass of 3.125
kg.
O In Step 1, he should have found the square root of
400 J instead of squaring 8 m/s.
O In Step 1, he should have multiplied 8 m/s by 2
instead of squaring it.
O In Step 2, he should have divided 64 m2/s2 by 400 J
instead of dividing 400 J by 64 m2/s2.
In Step 3, he should have multiplied 6.25 J per m²/s?
by 2 instead of dividing it by 2.

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

True or false graphs must include scales that increase by the same amount

Which of the following are guidelines to follow for obtaining accurate observations