How much of the electromagnetic spectrum is visible to us A. all of it
B. None of it
C. Most of it
D. A small part of it

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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u i forgot the answer?