A cube of some rock weighs 6 grams, and a same-sized cube of water weighs 2 grams. What is the specific gravity of this rock?

The specific gravity of the rock with respect to water is equal to 3

Explanation:

To solve the question, we list out the variables as follows

Mass of rock = 6 grams

Mass of equal volume of water = 2 grams

Specific gravity or relative density is the mass of a unit volume of a substance divided by the mass of an equal volume of a reference material.

Specific gravity = (mass of substance) / (mass of equal volume of water)

Therefore the specific of the rock sample is = (mass of cube of rock sample) / (mass of same-sized cube of water)

= (6 grams) / (2 grams) = 3

The specific gravity of the rock = 3