Tornadoes have caused widespread damage in different parts of the united states of america. some methods to prevent damages due to tornadoes are stated below. method 1: restrict personal travel to areas which have had tornadoes in the past. method 2: use more advanced techniques to predict tornadoes. which of these statements best compares the two methods to prevent damages due to tornadoes? select one: a. method 1 is more expensive than method 2. b. method 2 is more practical than method 1. c. method 2 is harder to implement than method 1. d. method 1 causes less damage to the environment than method 2.

c)as speed changes, wavelength and frequency change.

everything changes!

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