Final answer:
The density of the rock is calculated by dividing the mass (60g) by the volume (30 cm³), resulting in a density of 2.0 g/cm³, which is consistent with the value for granite.
Step-by-step explanation:
The student asked about calculating the density of a rock with a given mass and volume. Density is a physical property that is defined as the mass of an object divided by its volume. The formula to calculate density is:
Density = Mass / Volume
In this particular example, the student has a rock with a mass of 60g and a volume of 30 cm³. To find its density, one would perform the following calculation:
Density = 60g / 30 cm³
Upon dividing 60g by 30 cm³, the density is found to be 2.0 g/cm³. This value indicates how much mass is contained in a certain volume of the rock. Comparing this to known values of common materials can help to identify or confirm the type of rock. For example, the density is consistent with common values for granite, which typically has a density around 2.65 to 2.75 g/cm³.