specific density

简明释义

相对密度

英英释义

例句

1.The specific density 比重 of this metal is higher than that of aluminum.

这种金属的比重高于铝。

2.The specific density 比重 of seawater is about 1.025.

海水的比重大约为1.025。

3.The specific density 比重 of a substance can affect its melting point.

物质的比重会影响其熔点。

4.In this experiment, we measured the specific density 比重 of various liquids.

在这个实验中，我们测量了各种液体的比重。

5.To calculate the buoyancy, we need to know the specific density 比重 of the object.

要计算浮力，我们需要知道物体的比重。

作文

Understanding the concept of specific density is crucial in various scientific fields, particularly in physics and engineering. Specific density, also known as specific gravity, refers to the ratio of the density of a substance to the density of a reference substance, typically water for liquids and air for gases. This dimensionless quantity provides essential insights into the behavior of materials under different conditions. For instance, when we say that a certain liquid has a specific density greater than one, it indicates that this liquid is denser than water. Consequently, if you were to pour this liquid into water, it would sink. Conversely, a liquid with a specific density less than one would float on water.In practical applications, understanding specific density helps engineers design vessels and structures that can withstand various pressures and forces. For example, in the aerospace industry, knowing the specific density of fuels is vital for calculating weight-to-thrust ratios, which directly influence the performance of an aircraft. Similarly, in the oil and gas sector, the specific density of crude oil is a critical factor in determining how it will behave during extraction and transportation. Moreover, specific density plays a significant role in environmental science. When assessing the impact of pollutants in water bodies, scientists often measure the specific density of contaminants to predict their movement and dispersion. A pollutant with a higher specific density than water is likely to settle at the bottom, affecting aquatic life and water quality. Understanding these dynamics allows for better management and remediation strategies.Additionally, in the field of material science, specific density is a key parameter when selecting materials for construction or manufacturing. Materials with a high specific density are often stronger and more durable, making them suitable for heavy-duty applications. On the other hand, lightweight materials with a low specific density are preferred in industries where reducing weight is crucial, such as automotive and aerospace.In conclusion, the concept of specific density is not just an abstract idea; it has practical implications across various disciplines. From engineering to environmental science, understanding specific density enables professionals to make informed decisions that can lead to safer, more efficient, and more sustainable practices. As we continue to explore and innovate in these fields, the importance of mastering the concept of specific density cannot be overstated. It serves as a fundamental principle that underpins many of the technologies and solutions we rely on today.

理解比重的概念在物理学和工程等多个科学领域中至关重要。比重，也称为相对密度，是指某种物质的密度与参考物质的密度之比，通常液体以水为参考，气体以空气为参考。这个无量纲的量提供了关于材料在不同条件下行为的重要见解。例如，当我们说某种液体的比重大于1时，表示该液体的密度大于水。因此，如果将这种液体倒入水中，它将沉入水底。相反，比重小于1的液体则会漂浮在水面上。在实际应用中，了解比重有助于工程师设计能够承受各种压力和力的容器和结构。例如，在航空航天工业中，知道燃料的比重对于计算推重比至关重要，这直接影响飞机的性能。同样，在石油和天然气行业，原油的比重是决定其在开采和运输过程中行为的关键因素。此外，比重在环境科学中发挥着重要作用。当评估污染物对水体的影响时，科学家们常常测量污染物的比重以预测其移动和扩散情况。比重高于水的污染物可能会沉积在底部，影响水生生物和水质。理解这些动态使得更好的管理和修复策略成为可能。此外，在材料科学领域，比重是选择建筑或制造材料的关键参数。具有高比重的材料通常更强大、更耐用，适合重型应用。另一方面，在需要减轻重量的行业，如汽车和航空航天，轻质材料（低比重）更受欢迎。总之，比重的概念不仅仅是一个抽象的理念；它在各个学科中具有实际意义。从工程到环境科学，理解比重使专业人士能够做出明智的决策，从而导致更安全、更高效和更可持续的实践。随着我们继续探索和创新这些领域，掌握比重的概念的重要性不言而喻。它作为许多我们今天依赖的技术和解决方案的基础原则。