020 (part 1 of 2) 10.0 points
Simpson drives his car with an average veloc
ity of 47.7 km/h to the east.
How long will it take him to drive 149 km
on a straight highway?
1. 3.01811
2. 3.08977
3. 3.35498
4. 2.83058
5. 3.22718
6. 3.16327
7. 2.96218
8. 3.41463
9. 3.12369
10. 3.27549
Answer in units of h
021 (part 2 of 2) 10.0 points
How much time would Simpson save by in-
creasing his average velocity to 71.3 km/h to
the east?
1. 53.6218
2. 33.5913
3. 90.3376
4. 82.7733
5. 62.0357
6. 76.4599
7. 86.7188
8. 103.119
9. 78.6778

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

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

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared