Which of the following is true about the weight of a solid material?

• A. It varies with temperature
• B. It is constant and not dependent on gravity
• C. It is equal to volume multiplied by specific gravity
• D. It depends solely on the material's density

Answer: (C)

The statement about the weight of a solid material being equal to volume multiplied by specific gravity is accurate because specific gravity is a dimensionless quantity that represents the ratio of the density of the material to the density of a reference substance, typically water. Therefore, when you multiply the specific gravity (which indicates how dense the material is compared to water) by the volume, you derive the weight of the material in a specific gravitational field.

Specific gravity can be thought of as a conversion factor that allows us to relate the volume of the material directly to its weight, as weight is the force exerted by gravity on mass. Given that weight is a product of mass and gravitational acceleration, and that mass is derived from the material's density and volume, the equation effectively shows the interconnectedness of these physical properties in determining weight.

The other statements do not accurately describe the relationship between the weight of a solid material and its properties. For example, while the weight does vary with temperature due to changes in density for many materials, the statement about weight being constant and not dependent on gravity is fundamentally incorrect, as weight is directly influenced by gravity. Similarly, while density is related to weight, it isn't the sole factor; weight specifically involves the acceleration due to gravity and how that