Engineering Material Properties

noun a term used in physics and engineering to describe the ratio of the density of a substance to the density of a reference substance

• The specific gravity of the liquid is a crucial factor in determining its density.
• You can tell how heavy something is by looking at its specific gravity.
• Specific gravity is like the weight scale for liquids.
• The specific gravity of the situation indicated how serious it was.

noun the quality or state of being strong, resilient, and able to withstand difficult conditions or situations

• The toughness of the material makes it suitable for use in extreme conditions.
• His mental toughness helped him get through the challenging times.
• She's got some serious toughness about her, nothing seems to faze her.
• The toughness of her exterior hides a gentle heart within.