8 November, 04:14
Why is cutting hair a physical?
8 November, 04:23
It is a physical because you are only changing the physical appearance. You are not making a chemical change to it.
8 November, 05:08
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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» Why is cutting hair a physical?