Answer:

Explanation:
given,
train travels due south at = 24 m/s
rain blown toward south
path of raindrop = 70° with vertical
so,
now,






The valence electrons of metals are weakly attracted to the parent nuclei, so the electrons break free and float. The moving electrons form a electron <u>negative</u> blanket that binds the atomic <u>positive</u> nuclei together, forming a metallic bond.
So the answers are <u>{ Negative }</u> and <u>{ Positive }.</u>
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Minimum number of reactants a chemical equation can have is 2.
True, for example, sound waves are known for vibrating and they move up and down in a particular pattern depending on the pitch and volume. :) Hope this helps x