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.

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

i will answer your question if you answer mine

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19