What is one property of a wave that determines how much it will diffract when it encounters an obstacle? -speed -amplitude -polarization -wavelength suppose two waves collide, and the temporary combined wave that results is smaller than the original waves. what term best describes this interaction? -diffraction -destructive interfernce -standing wave formation -constructive interfernce the formation of a standing wave requires -the traveling of a wave for a long distance -constructive interference between two waves of slightly different frequencies -that refraction and diffraction occur at the same time in a wave -interference between incoming and reflected waves

1. D - Reflection

2. C - enter a new medium at an angle

3. D - wavelength

4. B - destructive interference

5. D - interferance between incoming and reflected waves

Hope this helps :)

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