Rris is how u right it Mg=? Because it ask u a question and then you put the equal sign and then you put the question mark because you don't know it yet
Answer:
There is nothing attached to this question so I unfortunately cannot help you
Explanation:
Answer:
The collision theory states that a chemical reaction can only occur between particles when they collide (hit each other).
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Hot air balloons have hot air inside them, which is less dense as the air around it. Thus it rises. A cold air balloon would sink because the air would be more dense than the air around it. Also, the balloon’s volume would vary in size depending on the weight of the balloon.
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