True or false: a physical change may produce a new substance. a true b false

False

Explanation:

Physical change only changes the appearance of an object or material, but it does not change the substance.

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hello,

answer: a federal government has final authority on interstate/inter provincial  and international affairs, a confederation is one where the central/national government or authority is governing body what does not have final say over the same matters. hopefully this and i will try again if you don't like this answer : )

best of luck!

answer; they both highlight the power of the situation in determining behavior;