Consider a system consisting of two objects initially moving separately. The two objects collide and stick together. If the objects continue moving after crashing, what can we state about the kinetic energy
and momentum of the system before and after the crash?

A. The kinetic energy of the system has decreased.
The momentum of the system has decreased.

B. The kinetic energy of the system remains constant.
The momentum of the system remains constant.

C. The kinetic energy of the system remains constant.
The momentum of the system has decreased.

D. The kinetic energy of the system has decreased.
The momentum of the system remains constant.

the answer is kevlar

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

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide

answera compound;