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25 July, 16:31

Why is cutting hair a physical?

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  1. 25 July, 18:20
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    It is a physical because you are only changing the physical appearance. You are not making a chemical change to it.
  2. 25 July, 18:21
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    They do not change the nature of the substance unless a chemical change occurs along with the physical change. These may be irreversible, but the result is still composed of the same molecules. When you cut your hair, that is a physical change, even though you can't put the hair back on your head again
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