- #1
Curl
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Say you have a 1kg piece of metal (1kg EXACTLY) at an arbitrary, constant temperature. You make a scratch in it with a needle, and you do it carefully enough that you don't rub off any atoms off the metal onto the needle, that way you still have 1.00000000000000000000000000... kg of metal in your block. Then you wait until the block returns to its original temperature described above (EXACT same temperature).
Does the block weight more now?
Does the block weight more now?