How do astronomers explain the orbit of hot jupiters

a. droppler shifts

b. nebula theory
c. planetary migration
d. astronmerty

50.)the diagram below represents the wave fronts produced by a point source moving to the right in a uniformmedium. observers are located at points a and b.compared to the wave frequency and wavelength observed at point a, the wave observed at point b has a(1) higher frequency and a shorter wavelength(2) higher frequency and a longer wavelength(3) lower frequency and a shorter wavelength(4) lower frequency and a longer wavelength

How do you determine polarity of a molecule?

Curves in canyons formed by a downcutting stream are: downcut meanders, furrowed meanders , entrenched meanders, or embedded meanders