Lexy and jin study the diagram shown.
which best explains who is correct?
n
=
2
o lexy is correct because angle r is between the incident
wave, n = 0, and a diffracted wave.
lexy is correct because angle rincludes the diffracted
wave at n = 1
jin is correct because angle s is measured from the
barrier and includes n = 2, the wave that has the most
diffraction
jin is correct because angle s is between the dimmest
order bands, n = 1 and n =
lexy says that the diffraction angle is the one labeled r
and jin says that the diffraction angle is the one labeled s.

Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

How does an observation about an object differ from an inference about that object