vacuum bell jar

简明释义

真空钟罩

英英释义

例句

1.In the laboratory, we often use a vacuum bell jar for experiments involving gas laws.

在实验室中，我们经常使用真空钟罩进行涉及气体定律的实验。

2.After placing the plant inside the vacuum bell jar, we monitored its photosynthesis rate.

将植物放入真空钟罩后，我们监测了其光合作用速率。

3.The vacuum bell jar is essential for creating a controlled environment for our chemical reactions.

对于我们的化学反应来说，真空钟罩是创建受控环境的必需品。

4.The scientist placed the specimen inside a vacuum bell jar to observe its behavior in a low-pressure environment.

科学家将标本放入真空钟罩中，以观察其在低压环境下的表现。

5.To demonstrate the effects of air pressure, the teacher used a vacuum bell jar to show how a marshmallow expands.

为了演示气压的影响，老师使用了真空钟罩来展示棉花糖是如何膨胀的。

作文

The concept of a vacuum bell jar is fascinating and essential in the field of physics and scientific experimentation. A vacuum bell jar is essentially a glass container that can be sealed to create a vacuum inside. This allows scientists to conduct experiments in an environment free from air and other gases. The significance of using a vacuum bell jar lies in its ability to eliminate air resistance, which can affect the outcomes of various experiments. For instance, when studying the behavior of falling objects, a vacuum bell jar can help demonstrate how gravity acts on these objects without the interference of air friction.In many educational settings, teachers use a vacuum bell jar to illustrate fundamental concepts in physics. One popular demonstration involves placing a feather and a bowling ball inside the vacuum bell jar. When the air is removed, both the feather and the bowling ball fall at the same rate, showcasing Galileo's principle that all objects fall at the same acceleration due to gravity, regardless of their mass. This experiment captivates students’ attention and helps them grasp the concept of gravity in a tangible way.Moreover, a vacuum bell jar is also used in chemistry to study reactions that might be affected by the presence of air. Certain chemical reactions require an oxygen-free environment to proceed efficiently. By using a vacuum bell jar, chemists can create the necessary conditions for these reactions, leading to more accurate and reliable results. This is particularly important in the synthesis of sensitive compounds that could easily react with atmospheric oxygen or moisture.Another application of the vacuum bell jar is found in the field of materials science. Researchers often need to test the properties of materials under different atmospheric conditions. By utilizing a vacuum bell jar, they can create a controlled environment that allows them to observe how materials behave when subjected to vacuum conditions. This is crucial for developing new materials that can withstand extreme environments, such as those encountered in space exploration.In addition to scientific applications, vacuum bell jars are also aesthetically pleasing and have found their way into home decor. Many people use them to display plants, collectibles, or even food items, creating a visually appealing centerpiece while simultaneously protecting the contents from dust and contamination. This dual function of the vacuum bell jar as both a scientific instrument and a decorative item highlights its versatility.In conclusion, the vacuum bell jar is a remarkable tool that serves multiple purposes in the realms of science and everyday life. Its ability to create a vacuum allows for numerous experiments and observations that would be impossible in a normal atmospheric environment. Whether it is used to teach students about gravity, facilitate chemical reactions, or explore material properties, the vacuum bell jar remains an invaluable asset in both educational and research settings. As we continue to explore the mysteries of our universe, tools like the vacuum bell jar will undoubtedly play a crucial role in expanding our understanding of the physical world.

“真空钟罩”的概念在物理学和科学实验领域中是令人着迷且至关重要的。真空钟罩本质上是一个可以密封以在内部创建真空的玻璃容器。这使得科学家能够在没有空气和其他气体的环境中进行实验。使用真空钟罩的意义在于它能够消除空气阻力，这可能会影响各种实验的结果。例如，在研究下落物体的行为时，真空钟罩可以帮助演示重力如何作用于这些物体，而不受空气摩擦的干扰。在许多教育环境中，教师使用真空钟罩来说明物理学中的基本概念。一种流行的演示是将羽毛和保龄球放入真空钟罩中。当空气被抽走时，羽毛和保龄球以相同的速度下落，展示了伽利略的原则：所有物体在重力作用下以相同的加速度下落，无论其质量如何。这个实验吸引了学生的注意，并帮助他们以具体的方式理解重力的概念。此外，真空钟罩还用于化学研究，以研究可能受到空气影响的反应。某些化学反应需要无氧环境才能有效进行。通过使用真空钟罩，化学家可以创造出这些反应所需的条件，从而获得更准确和可靠的结果。这对于合成可能容易与大气氧气或水分反应的敏感化合物尤为重要。真空钟罩的另一个应用在材料科学领域。研究人员通常需要测试材料在不同气氛条件下的性能。通过利用真空钟罩，他们可以创造出一个控制环境，观察材料在真空条件下的表现。这对于开发能够承受极端环境的新材料至关重要，例如在太空探索中遇到的环境。除了科学应用外，真空钟罩也具有美观性，已成为家居装饰的一部分。许多人用它来展示植物、收藏品甚至食品，既创造了视觉吸引力的中心，又保护内容物免受灰尘和污染。这种真空钟罩作为科学仪器和装饰物的双重功能突显了它的多功能性。总之，真空钟罩是一个非凡的工具，在科学和日常生活的多个领域中发挥着重要作用。它创建真空的能力使得在正常气氛环境中不可能进行的实验和观察成为可能。无论是用于教导学生关于重力的知识，促进化学反应，还是探索材料特性，真空钟罩始终是教育和研究环境中的宝贵资产。随着我们继续探索宇宙的奥秘，像真空钟罩这样的工具无疑将在扩展我们对物理世界的理解方面发挥关键作用。