beam balance

简明释义

杠杆式秤

英英释义

例句

1.The beam balance is essential for ensuring that the weights are evenly distributed during the experiment.

在实验中，梁式天平对于确保重量均匀分布至关重要。

2.During the physics class, the teacher demonstrated how to use a beam balance to compare masses.

在物理课上，老师演示了如何使用梁式天平来比较质量。

3.To calibrate the beam balance, we placed standard weights on both sides.

为了校准梁式天平，我们在两侧放置了标准砝码。

4.The antique shop had a beautiful beam balance from the 19th century on display.

古董店里展出了一台19世纪的美丽梁式天平。

5.In the chemistry lab, we used a beam balance to measure the mass of the chemicals accurately.

在化学实验室，我们使用梁式天平来准确测量化学品的质量。

作文

In the world of science and measurement, precision is paramount. One of the oldest and most reliable instruments used for measuring mass is the beam balance. A beam balance (天平) operates on the principle of balancing two masses against each other. This device consists of a beam that is pivoted at its center, with two pans suspended from either end. When an object is placed on one pan, weights can be added to the other pan until equilibrium is achieved. This simple yet effective mechanism has been utilized for centuries in laboratories, schools, and various industries.The history of the beam balance can be traced back to ancient civilizations, where it was used for trade and commerce. Merchants relied on this instrument to ensure fair transactions, as accurate weight measurements were crucial for maintaining trust between buyers and sellers. The design of the beam balance has evolved over time, but its fundamental principles remain unchanged. Today, it serves not only as a tool for weighing but also as a teaching aid in educational settings, helping students understand the concepts of mass, force, and equilibrium.One of the key advantages of using a beam balance is its ability to provide highly accurate measurements. Unlike digital scales, which can be affected by factors such as battery life or calibration errors, the beam balance relies solely on gravitational force. This makes it an excellent choice for laboratories that require precise measurements for experiments. Additionally, the beam balance does not require any power source, making it a sustainable option for various applications.In practical use, the beam balance can be found in chemistry labs where precise measurements of reactants are essential. For instance, when conducting chemical reactions, scientists must weigh out specific amounts of substances to ensure that the reaction proceeds correctly. Using a beam balance allows them to achieve this level of accuracy and reliability. Furthermore, in educational environments, students learn how to use a beam balance to measure mass, fostering a deeper understanding of scientific principles.However, while the beam balance is a powerful tool, it is important to acknowledge its limitations. For example, it may not be suitable for measuring very small masses or extremely large objects due to its design constraints. In such cases, other types of balances, like electronic scales, might be more appropriate. Nonetheless, the beam balance remains a staple in many laboratories and classrooms because of its simplicity and effectiveness.In conclusion, the beam balance (天平) is a remarkable instrument that has stood the test of time. Its ability to provide accurate measurements and its historical significance in trade and education make it an invaluable tool in the field of science. As technology continues to advance, it is essential to appreciate the foundational tools like the beam balance that have paved the way for modern measurement techniques. By understanding and mastering the use of a beam balance, we not only honor the legacy of scientific discovery but also equip ourselves with the skills necessary for future innovations.