Explain the two key properties of blood that allow it to be a key piece of evidence. Increasing velocity/height also increases what three things about the spatter? There are only 21 trained blood spatter professionals certified in the United States - How does one become a blood stain analysis expert? What does this do to the case against someone? Describe how poorly handled blood evidence in the Azaria Chamberlain case caused police to suspect the parents of murdering their baby daughter.

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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