Answer: The principle is that the mass of matter, in a closed system, will always be the same no matter what type of change happens to the matter. Whether it's a change in state, or dissolving, or a chemical reaction, or any combination of these, the amount of mass will not change.
Explanation:
For example, Australia, words like Mate, oi, g'day, they say that Australia is very lay back but rough.
Answer:
variable-interval.
to get good grades, you must study and pay attention to score high, since the tests are inconsistent and at unknown passages of time.
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Almost all of them opposed child labor in the factory.
According to them, exposing a child (which physique still hasn't fully developed yet) to the factory's environment will be very bad for the child's well being
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