The hardness of materials is relative. For example, rubber is harder than sponge but softer than iron, indicating that hardness depends on what the material is being compared to.
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The hardness of materials is relative. For example, rubber is harder than sponge but softer than iron, indicating that hardness depends on what the material is being compared to.
The hardness of materials is relative, not absolute. It depends on the materials being compared. For instance, a material like rubber is harder than a sponge but softer than iron, demonstrating that hardness varies based on comparison.