<span>Health problems that develop later</span>
0.616 is the distance from the top
of the building to the top of the window.
The answer is either
b A system in which Newton's Laws are valid
or
c A system in which there are no external forces.
Explanation:
not a, and not d
There are energy changes in a closed system.
A closed system obeys the conservation laws in its physical description.
