graduated cylinder

简明释义

量筒

英英释义

例句

1.We need a graduated cylinder for our chemistry experiment to measure the reactants.

我们需要一个量筒来测量反应物进行化学实验。

2.A graduated cylinder is more accurate than a beaker for measuring liquids.

相比于烧杯，量筒在测量液体时更为准确。

3.Make sure to read the meniscus at eye level when using a graduated cylinder.

使用量筒时，确保在眼平视高度读取弯液面。

4.The scientist poured the solution into a graduated cylinder to ensure accurate measurements.

科学家将溶液倒入量筒中，以确保测量准确。

5.To measure the precise volume of liquid, we used a graduated cylinder.

为了测量液体的精确体积，我们使用了一个量筒。

作文

A graduated cylinder is a common piece of laboratory equipment used to measure the volume of a liquid. It is typically made of glass or plastic and has a cylindrical shape with a spout for pouring. The sides of the graduated cylinder are marked with lines that indicate the volume of liquid contained within. This makes it an essential tool for scientists and students in chemistry, biology, and other fields that require precise measurements.The design of the graduated cylinder allows for accurate readings due to its narrow shape, which minimizes the meniscus effect. The meniscus is the curve seen at the surface of a liquid when it is placed in a container. When using a graduated cylinder, it is important to read the measurement at eye level to ensure precision. This helps avoid parallax error, which can occur if the measurement is taken from above or below the meniscus.In a typical laboratory setting, you might find various sizes of graduated cylinders, ranging from 10 mL to 2 liters. Each size serves different purposes depending on the volume of liquid being measured. For instance, smaller graduated cylinders are ideal for measuring small quantities of reagents, while larger ones are suitable for mixing solutions or conducting experiments that require larger volumes.Using a graduated cylinder is straightforward. First, you need to place the cylinder on a flat, stable surface. Next, pour the liquid into the cylinder until it reaches the desired mark. Always ensure that the liquid settles and the meniscus forms before taking the reading. Once you have your measurement, you can use the graduated cylinder to transfer the liquid to another container or continue with your experiment.One of the advantages of using a graduated cylinder over other measuring tools, such as beakers, is its accuracy. Beakers are generally not designed for precise measurements, while graduated cylinders provide a more reliable reading thanks to their graduated markings. This accuracy is crucial in scientific experiments where even slight variations in volume can lead to significant differences in results.In addition to its use in laboratories, the graduated cylinder has applications in various industries, including pharmaceuticals, food and beverage, and environmental testing. In these fields, accurate volume measurement is vital for quality control and ensuring compliance with safety regulations.In conclusion, the graduated cylinder is an indispensable tool in both educational and professional settings. Its ability to provide accurate volume measurements makes it essential for conducting experiments and ensuring that results are reliable. As students and professionals continue to explore the world of science, mastering the use of a graduated cylinder will enhance their understanding of measurement and the importance of precision in scientific work. By learning how to properly utilize this tool, individuals can contribute to the advancement of knowledge and innovation in their respective fields.

量筒是一种常见的实验室设备，用于测量液体的体积。它通常由玻璃或塑料制成，具有圆柱形状，并带有一个用于倒液的喷嘴。量筒的侧面标有指示所含液体体积的刻度线。这使得它成为化学、生物学和其他需要精确测量的领域中科学家和学生的必备工具。量筒的设计使其能够由于狭窄的形状而提供准确的读数，从而最小化弯月面效应。弯月面是当液体放置在容器中时，在液体表面看到的曲线。在使用量筒时，从眼平视的角度读取测量值非常重要，以确保精确。这有助于避免视差误差，即如果从弯月面上方或下方读取测量值可能会发生的错误。在典型的实验室环境中，你可能会发现各种尺寸的量筒，范围从10毫升到2升。每种尺寸根据所测量的液体体积服务于不同的目的。例如，较小的量筒非常适合测量少量试剂，而较大的量筒则适合混合溶液或进行需要较大体积的实验。使用量筒是简单的。首先，你需要将量筒放在平坦、稳定的表面上。接下来，将液体倒入量筒，直到达到所需的刻度线。始终确保液体平稳沉淀并形成弯月面，然后再进行读数。一旦你得到了测量值，可以使用量筒将液体转移到另一个容器或继续进行实验。使用量筒的一个优势是相较于其他测量工具（如烧杯），它的准确性。烧杯通常不设计用于精确测量，而量筒则因其刻度标记而提供更可靠的读数。这种准确性在科学实验中至关重要，因为即使是微小的体积变化也可能导致结果的显著差异。除了在实验室中的使用，量筒还在制药、食品和饮料以及环境测试等各个行业中应用。在这些领域，准确的体积测量对质量控制和确保遵守安全法规至关重要。总之，量筒是教育和专业环境中不可或缺的工具。它提供准确的体积测量的能力使其在进行实验和确保结果可靠方面至关重要。随着学生和专业人士继续探索科学世界，掌握量筒的使用将增强他们对测量和科学工作中精确性重要性的理解。通过学习如何正确利用这一工具，个人可以为其各自领域知识和创新的发展做出贡献。