Answer:
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior.
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Answer:
D, maintain a constant velocity until acted on by another force
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Answer:
meh so that why u should and
Explanation:
The average speed is 8km/hr. This is because the formula to find Speed is Speed = Distance/Time and we know that 8 divided by 1 is 8. It is that simple. Hope this helps and have a great rest of your day