Answer:
Therefore, the density of the rock is 3000 kg/m³.
Step-by-step explanation:
The density of an object can be calculated by dividing its mass by its volume. In this case, the mass of the rock is 45 g and its volume is 15 cm³.
Density (ρ) = Mass (m) / Volume (V)
Converting the mass to kilograms (since the SI unit for mass is kg) and the volume to cubic meters (since the SI unit for volume is m³), we have:
Mass (m) = 45 g = 45 / 1000 kg = 0.045 kg
Volume (V) = 15 cm³ = 15 / 1000000 m³ = 0.000015 m³
Now, we can calculate the density:
Density (ρ) = 0.045 kg / 0.000015 m³ = 3000 kg/m³
Therefore, the density of the rock is 3000 kg/m³.