Which of the following is an example of a closed system? A)
the Earth system
B)
the ocean
C)
an ecosystem
D)
a biome
E)
material or energy that is able to move in or out of a system

A, the Earth system

Explanation:

The boundary would be the atmosphere, as energy cannot leave. No mass is shared between the rest of the universe and Earth

ek = (m.v2) / 2

v - velocity of system after the collision

m = m1 + m2

ek = (m1 + m2) v2/2

ek = (200 + 250) 2,32/2 = 450*5,29/2 = 1190,25 j

by: nicholas dooley

answerthe employer shall direct drivers to travel with the load trailing;