6. An object is in _____________________________ when its distance from a(n) __________________________is changing. 7. Speed in
a given direction is __________________________________. 8. ___________________________ can be calculated if you know the distance an object travels in one unit of time.
<em>Explanation:An object is in motion when its distance from another object is changing. Whether an object is moving or not depends on your point of view. ... A reference point is a place or object used for comparison to determine if something is in motion. An object is in motion if it changes position relative to a reference point.</em>
You use two single-barbed arrows pointing in opposite directions (technically rightwards harpoon over leftwards harpoon) <em>to indicate a reversible reactio</em>n.
