kelvin

简明释义

英[ˈkelvɪn]美[ˈkelvɪn]

n. 开尔文（英国物理学家，数学家）；凯尔文（男子名）；绝对温标

adj. 开氏度的（常作 K-）

英英释义

单词用法

同义词

反义词

例句

1.Well, here we get, we find that delta H is dH Delta S is negative 198 joules per Kelvin.

我们发现自由焓的变化,为负92千焦，negative，92，kiloJoules。,熵增dS是负198焦耳每开尔文。

2."To get the noctilucent clouds you need temperatures that are about 20 degrees Kelvin colder than what we see on average up there," Wickwar said.

要获得夜光云，你需要的气温要比我们在那里看到的平均温度冷约20度绝对温度。

3.Usually, gas clouds in space have been warmed to at least 2.7 kelvin by the cosmic microwave background, the relic radiation left over from the big bang.

通常太空中的气体云在大爆炸所遗留下的宇宙微波的背景的作用下至少要加热到2.7开尔文。

4.Madeline Hayes’ son Kelvin is twelve. He will be entering the seventh grade.

Madeline Hayes的儿子Kelvin今年12岁，他将进入七年级。

5.In the opening scene of 2009's star Trek movie reboot, the Federation starship USS Kelvin is under attack by the Romulans.

《星际旅行》在2009重起炉灶。在影片的开场，星联飞船USS开尔文号遭到了罗穆兰人的攻击。

6.Let's consider a perfect atomic crystal at essentially zero degrees Kelvin. Zero Kelvin.

考虑的完美的原子晶体，绝对零度下。

7.Kelvins: a CFL's color is indicated by the Kelvin (k) temperature (listed on the package).

译者注：色温是表示光源光色的尺度，单位为K开尔文。色温是在摄影、录象、出版等领域具有重要应用。

8.The color temperature of sunlight is approximately 5500 kelvin.

阳光的色温大约为5500 开尔文。

9.Cryogenics studies materials at temperatures below 100 kelvin.

低温学研究材料在低于100 开尔文 的温度下的特性。

10.Absolute zero is defined as 0 kelvin, where all molecular motion stops.

绝对零度被定义为0 开尔文，在这个温度下所有分子运动停止。

11.The temperature of the boiling point of water is 373.15 kelvin.

水的沸点温度是373.15 开尔文。

12.In scientific experiments, temperatures are often measured in kelvin for precision.

在科学实验中，温度通常以 开尔文 为单位进行精确测量。

作文

The concept of temperature is fundamental to our understanding of the physical world. One of the most important temperature scales used in science is the kelvin（开尔文） scale. Named after the Scottish physicist William Thomson, 1st Baron Kelvin, the kelvin（开尔文） scale is an absolute temperature scale that starts at absolute zero, the point at which all molecular motion ceases. This makes it particularly useful in scientific research and applications where precise measurements of thermal energy are required.In everyday life, we often encounter temperature measured in degrees Celsius or Fahrenheit. However, in the realms of physics and engineering, the kelvin（开尔文） scale is preferred because it provides a direct correlation to the energy of particles. For instance, at 0 K (absolute zero), the entropy of a perfect crystal reaches its minimum value, which is a cornerstone of the third law of thermodynamics. This law states that as the temperature approaches absolute zero, the entropy of a system approaches a constant minimum.One of the unique features of the kelvin（开尔文） scale is that it does not use the degree symbol; rather, temperatures are simply expressed in kelvins (K). For example, the freezing point of water is 273.15 K and the boiling point is 373.15 K. By using the kelvin（开尔文） scale, scientists can easily perform calculations involving thermodynamic equations without the need for conversion factors that would be necessary if using other temperature scales.The kelvin（开尔文） scale also plays a crucial role in various scientific fields, including astrophysics, chemistry, and materials science. In astrophysics, for example, the temperature of stars is often expressed in kelvins to describe their energy output and spectral characteristics. The color of a star can indicate its temperature; for instance, a blue star is much hotter than a red star, with temperatures reaching thousands of kelvins.In chemistry, the kelvin（开尔文） scale is essential for understanding gas laws and reactions. According to the ideal gas law, the pressure and volume of a gas are directly related to its temperature in kelvins. This relationship allows chemists to predict how gases will behave under different conditions, which is vital for both theoretical and practical applications in the laboratory.Moreover, in materials science, the properties of materials can change dramatically with temperature. For instance, superconductivity—a phenomenon where certain materials exhibit zero electrical resistance—occurs at very low temperatures, often measured in kelvins. Understanding these temperature-dependent properties is crucial for developing new materials and technologies.In conclusion, the kelvin（开尔文） scale is an indispensable tool in the scientific community. Its absolute nature and direct relationship with energy make it the preferred choice for researchers and engineers alike. Whether studying the cosmos, conducting chemical reactions, or exploring the properties of materials, the kelvin（开尔文） scale provides a consistent framework for understanding temperature and its effects on matter. As we continue to explore the universe and develop new technologies, the significance of the kelvin（开尔文） scale will only grow, highlighting its importance in the advancement of science and technology.

温度的概念是我们理解物理世界的基础。科学中使用的一个重要温度尺度是kelvin（开尔文）尺度。该尺度以苏格兰物理学家威廉·汤姆森（开尔文勋爵）的名字命名，kelvin（开尔文）尺度是一个绝对温度尺度，从绝对零度开始，即所有分子运动停止的点。这使得它在需要精确热能测量的科学研究和应用中尤为有用。在日常生活中，我们经常遇到以摄氏度或华氏度测量的温度。然而，在物理和工程领域，kelvin（开尔文）尺度更受欢迎，因为它与粒子的能量有直接的关联。例如，在0 K（绝对零度）时，完美晶体的熵达到最低值，这是热力学第三定律的基石。该定律指出，随着温度接近绝对零度，系统的熵接近一个常数最小值。kelvin（开尔文）尺度的一个独特特点是它不使用度符号；而是将温度简单地表示为开尔文（K）。例如，水的冰点为273.15 K，沸点为373.15 K。通过使用kelvin（开尔文）尺度，科学家可以轻松进行热力学方程的计算，而无需使用其他温度尺度时所需的转换因子。kelvin（开尔文）尺度在多个科学领域中也发挥着至关重要的作用，包括天体物理学、化学和材料科学。在天体物理学中，例如，恒星的温度通常以开尔文表示，以描述其能量输出和光谱特征。恒星的颜色可以指示其温度；例如，一颗蓝色恒星的温度远高于一颗红色恒星，温度可达数千开尔文。在化学中，kelvin（开尔文）尺度对于理解气体法则和反应至关重要。根据理想气体法则，气体的压力和体积与其开尔文温度直接相关。这种关系使化学家能够预测气体在不同条件下的行为，这对实验室中的理论和实际应用至关重要。此外，在材料科学中，材料的性质可能会随着温度的变化而发生剧烈变化。例如，超导现象——某些材料表现出零电阻的现象——发生在非常低的温度下，通常以开尔文为单位进行测量。理解这些温度依赖性特性对于开发新材料和技术至关重要。总之，kelvin（开尔文）尺度是科学界不可或缺的工具。它的绝对性质和与能量的直接关系使其成为研究人员和工程师的首选。无论是在研究宇宙、进行化学反应还是探索材料的性质，kelvin（开尔文）尺度都提供了一个一致的框架来理解温度及其对物质的影响。随着我们继续探索宇宙并开发新技术，kelvin（开尔文）尺度的重要性只会增加，突显其在科学和技术进步中的重要性。