An object is in motion if its distance relative to another object is changing. To tell if an object is moving, you use a reference point. If an object's distance from another object [reference point] is changing. A place or object used for comparison to determine if something is in motion.
B, Carbon monoxide is the answer :)
Explanation:
A) use the formula:

B) use the formula:

with angular velocity u calculated in A)
<h3>WATER</h3>
Explanation:
<h2>#CARRYINGTOLEARN:)</h2>