No, you can compare densities for objects of different sizes. Just divide mass by volume for each object.
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No, it does not matter to have equal volume when comparing density. Density is an intrinsic property of a substance and is defined as mass per unit volume. Comparing densities is independent of the volume of the samples being compared.
Density is equal to the mass divided by the volume.
Volume is a measure of space that matter occupies. The volume of an object is determined by the amount of matter it contains and the arrangement of its particles. More matter typically results in a larger volume, while less matter results in a smaller volume.
Density measures how much mass is contained in a given volume. It is a physical property that describes the compactness of a substance. Mathematically, density is calculated by dividing an object's mass by its volume.
Density divided by volume is equal to mass. This relationship can be expressed through the formula: mass = density x volume.
Volume x density = mass