SPECIFIC WEIGHT Meaning and
Definition
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Specific weight is a physical property that quantifies the heaviness of a material per unit volume. It is defined as the weight of a substance divided by its volume and is typically expressed in units of Newtons per cubic meter (N/m³) or pounds per cubic foot (lb/ft³). The specific weight is often used to compare the relative weights of different materials or to determine the force exerted on a given volume of a substance by gravity.
In the field of engineering and physics, specific weight is an important concept in various applications. For instance, in fluid mechanics, it is used to characterize the density and buoyancy of fluids. The specific weight of a fluid can be influenced by factors such as temperature, pressure, and composition. In construction and civil engineering, specific weight is crucial for analyzing the stability and load-bearing capacity of structures, as well as for designing materials and determining their suitability for different purposes.
To calculate the specific weight of a substance, the weight of the material is divided by its volume. This calculation helps in understanding the behavior of different materials and how they interact with their surroundings. By measuring and comparing specific weights, engineers and scientists can make informed decisions about the best materials to use for various applications, ensuring the safety and efficiency of structures, and optimizing performance and functionality.
Etymology of SPECIFIC WEIGHT
The term "specific weight" is derived from two separate concepts: "specific" and "weight".
The word "specific" comes from the Latin word "specificus", which means "particular" or "special". In English, it was first used in the early 17th century to describe something that is distinguished or unique in its characteristics.
The word "weight" has its roots in the Old English word "wiht", which means "something heavy". It is also related to the Old Norse word "veiðr", meaning "weight" or "measure". Over time, "weight" has been used to refer to the heaviness or mass of an object.
When combined, the term "specific weight" refers to the weight of a substance per unit volume or unit mass, providing a measure of its density.
