It's purpose was to create jobs :D
Answer:
Both are only physical changes.
Explanation:
The green stuff is cupric chloride, a byproduct of corrosion of the valve body or possible copper leachate in the water. Either way, it's typical of water leakage where the water is of low pH. Boiling sugar to make caramel is the same as eating sugar, just in a different form.
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Answer:
C.
Explanation:
Europeans used highly advanced weaponry that Africans had not yet developed
Robots are making life much easier for customers
Answer:
deter and punish terrorist acts in the United States