A scale from which a rock is suspended reads 5 N when the rock is out of water and 3 N when the rock is submerged. The density of the rock is
A) the density of water.
B) 1.5 times the density of water.
C) 2.5 times the density of water.
D) 3.5 times the density of water.
E) none of the above
Answer: C
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Fill in the blank(s) with correct word