It's a hardness scale from 1-10 determining how easy or hard it is to scratch the mineral.
Remember that talc (like chalk or baby powder) is the softest and easiest to scratch then diamond being 10 is the hardest mineral to scratch or break or cut
I think it is because the electrons repel each other
Answer:
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Explanation:
F=ma
As velocity is constant, a=0
So, F=0
Hope this helps!