derived unit

简明释义

导出单位

英英释义

例句

1.The area is calculated in square meters, which is a derived unit of length.

面积以平方米计算，这是一个长度的派生单位。

2.In chemistry, molarity is a concentration derived unit defined as moles per liter.

在化学中，摩尔浓度是一个浓度派生单位，定义为每升摩尔数。

3.Pressure is expressed in pascals, which is another example of a derived unit.

压力以帕斯卡表示，这是另一个派生单位的例子。

4.The joule is a derived unit for measuring energy in the International System of Units.

焦耳是国际单位制中用于测量能量的派生单位。

5.In physics, the speed is a derived unit that combines distance and time.

在物理学中，速度是一个派生单位，它结合了距离和时间。

作文

In the field of science and engineering, measurements are crucial for understanding the world around us. One important concept that is often discussed in these fields is the idea of a derived unit, which refers to a unit of measurement that is defined by combining base units. For instance, the unit of speed, meters per second (m/s), is a derived unit because it is derived from the base units of distance (meters) and time (seconds). Understanding derived units is essential for anyone working in technical disciplines, as they provide a way to express complex measurements in a standardized manner.The International System of Units (SI) establishes seven base units, including the meter, kilogram, second, ampere, kelvin, mole, and candela. These base units serve as the foundation for all other measurements. When scientists or engineers need to measure quantities that cannot be expressed using only base units, they create derived units. For example, the unit of force, the newton (N), is a derived unit that is defined as one kilogram meter per second squared (kg·m/s²). This relationship illustrates how derived units can encapsulate multiple dimensions of measurement into a single unit.Another common example of a derived unit is the joule (J), which measures energy. A joule is defined as the amount of energy transferred when a force of one newton is applied over a distance of one meter (N·m). The ability to derive units like joules from base units allows scientists to communicate complex ideas clearly and effectively. It also facilitates calculations and conversions between different types of measurements, making it easier to solve problems in physics and engineering.The use of derived units extends beyond just physics; they are also prevalent in chemistry, biology, and various engineering disciplines. For example, in chemistry, concentration is often expressed in moles per liter (mol/L), which is another derived unit. This unit helps chemists quantify the amount of substance in a given volume of solution, enabling them to perform reactions and analyses accurately. Similarly, in biology, metabolic rates may be expressed in watts (W), where one watt is equal to one joule per second (J/s), showcasing yet another instance of a derived unit in use.In conclusion, understanding derived units is fundamental to the study and application of science and engineering. They allow for the combination of base units to create comprehensive measurements that can describe a wide range of phenomena. By mastering the concept of derived units, individuals can enhance their ability to communicate scientific ideas, perform calculations, and engage in meaningful discussions within their respective fields. As we continue to explore and innovate in science and technology, the importance of derived units will only grow, highlighting their essential role in our understanding of the universe.

在科学和工程领域，测量对于理解我们周围的世界至关重要。一个经常在这些领域讨论的重要概念是派生单位的概念，这指的是通过组合基本单位定义的测量单位。例如，速度的单位米每秒（m/s）就是一个派生单位，因为它是由距离（米）和时间（秒）的基本单位推导而来的。理解派生单位对于任何从事技术学科的人来说都是必不可少的，因为它们提供了一种以标准化方式表达复杂测量的方法。国际单位制（SI）建立了七个基本单位，包括米、千克、秒、安培、开尔文、摩尔和坎德拉。这些基本单位作为所有其他测量的基础。当科学家或工程师需要测量无法仅用基本单位表示的量时，他们会创建派生单位。例如，力的单位牛顿（N）是一个派生单位，定义为一千克米每秒平方（kg·m/s²）。这种关系说明了派生单位如何将多维度的测量封装成一个单一单位。另一个常见的派生单位例子是焦耳（J），它用于测量能量。焦耳被定义为当一个牛顿的力作用于一个米的距离时所转移的能量（N·m）。能够从基本单位推导出像焦耳这样的单位，使科学家能够清晰有效地传达复杂的思想。这也便于在不同类型的测量之间进行计算和转换，从而更容易解决物理和工程中的问题。派生单位的使用不仅限于物理；它们在化学、生物学和各种工程学科中也很普遍。例如，在化学中，浓度通常以摩尔每升（mol/L）表示，这又是一个派生单位。这个单位帮助化学家量化给定溶液体积中的物质量，使他们能够准确地进行反应和分析。同样，在生物学中，代谢率可能以瓦特（W）表示，其中一瓦特等于一焦耳每秒（J/s），再次展示了派生单位的使用。总之，理解派生单位对科学和工程的研究与应用是基础。它们允许将基本单位组合起来，创建可以描述广泛现象的全面测量。通过掌握派生单位的概念，个人可以增强其沟通科学思想、进行计算和参与各自领域内有意义讨论的能力。随着我们继续在科学和技术领域探索和创新，派生单位的重要性只会增加，突显出它们在我们理解宇宙中的基本作用。