law of conservation of energy

简明释义

能量守恒律

英英释义

例句

1.The law of conservation of energy helps us understand why perpetual motion machines are impossible.

通过能量守恒定律，我们可以理解为什么永动机是不可能的。

2.Engineers apply the law of conservation of energy when designing efficient machines to ensure that energy is not wasted.

工程师在设计高效机器时应用能量守恒定律，以确保能量不被浪费。

3.The law of conservation of energy is essential for understanding how roller coasters work; potential energy at the top transforms into kinetic energy as the coaster descends.

理解过山车的工作原理时，能量守恒定律至关重要；在顶部的势能在过山车下降时转化为动能。

4.In physics class, we learned about the law of conservation of energy, which states that energy cannot be created or destroyed, only transformed.

在物理课上，我们学习了能量守恒定律，它指出能量不能被创造或摧毁，只能转化。

5.When a ball is thrown into the air, the law of conservation of energy explains how its kinetic energy changes to potential energy at the peak of its flight.

当一个球被抛向空中时，能量守恒定律解释了它的动能如何在飞行顶点转变为势能。

作文

The law of conservation of energy states that energy cannot be created or destroyed; it can only be transformed from one form to another. This fundamental principle is a cornerstone of physics and has profound implications for our understanding of the universe. In essence, the total energy of an isolated system remains constant over time, which means that the energy present in a closed system will always equal the energy that was initially present, regardless of the changes that occur within that system.To illustrate this concept, consider a simple example: a pendulum. When the pendulum swings, it converts potential energy into kinetic energy and vice versa. At the highest point of its swing, the pendulum has maximum potential energy and minimal kinetic energy. As it descends, potential energy decreases while kinetic energy increases. At the lowest point of the swing, the pendulum reaches its maximum kinetic energy. Throughout this entire process, the total energy of the system remains constant, demonstrating the law of conservation of energy in action.This principle is not limited to mechanical systems; it also applies to thermal, chemical, and nuclear processes. For instance, in a chemical reaction, the energy stored in the bonds of reactants is transformed into different forms of energy, such as heat and light, when products are formed. The total energy before and after the reaction remains the same, again illustrating the law of conservation of energy.In our daily lives, we encounter numerous examples of this law. When we use electrical appliances, the electrical energy supplied is converted into other forms of energy, such as light, heat, or mechanical energy. A light bulb converts electrical energy into light and heat, while a toaster transforms electrical energy into thermal energy to brown bread. In each case, the energy is not lost but rather transformed, adhering to the law of conservation of energy.Understanding the law of conservation of energy has significant implications for various fields, including engineering, environmental science, and even economics. For engineers, designing efficient systems requires a deep understanding of how energy flows and transforms within those systems. In environmental science, recognizing the conservation of energy is crucial for understanding ecological systems and the impact of human activities on energy resources. Economically, the law of conservation of energy underscores the importance of sustainable practices, as energy resources are finite and must be managed wisely to ensure future generations can meet their needs.In conclusion, the law of conservation of energy is a fundamental principle that governs all physical processes. It teaches us that energy is a constant in our universe, always changing forms but never disappearing. By grasping this concept, we can better understand the natural world and make informed decisions about how we use and conserve energy in our daily lives. As we face global challenges related to energy consumption and climate change, the law of conservation of energy serves as a guiding principle in our quest for sustainability and innovation.

能量守恒定律表明，能量不能被创造或摧毁；它只能从一种形式转化为另一种形式。这个基本原则是物理学的基石，对我们理解宇宙有着深远的影响。实质上，一个孤立系统的总能量在时间上保持不变，这意味着一个封闭系统中存在的能量将始终等于最初存在的能量，无论该系统内发生了什么变化。为了说明这一概念，考虑一个简单的例子：摆锤。当摆锤摆动时，它将势能转化为动能，反之亦然。在摆动的最高点，摆锤具有最大势能和最小动能。当它下降时，势能减少而动能增加。在摆动的最低点，摆锤达到最大动能。在整个过程中，系统的总能量保持不变，展示了能量守恒定律的实际应用。这一原则不仅限于机械系统；它还适用于热、化学和核过程。例如，在化学反应中，反应物中储存的能量在生成产物时转化为其他形式的能量，如热和光。反应前后的总能量保持不变，再次说明了能量守恒定律。在我们的日常生活中，我们遇到了许多这个法则的例子。当我们使用电器时，供应的电能转化为其他形式的能量，如光、热或机械能。灯泡将电能转化为光和热，而烤面包机则将电能转化为热能来烤面包。在每种情况下，能量并没有消失，而是转化，遵循能量守恒定律。理解能量守恒定律对多个领域具有重要意义，包括工程、环境科学甚至经济学。对于工程师而言，设计高效系统需要深入了解能量在这些系统中的流动和转化。在环境科学中，认识到能量的守恒对于理解生态系统及人类活动对能源资源的影响至关重要。在经济学上，能量守恒定律强调了可持续实践的重要性，因为能源资源是有限的，必须明智地管理，以确保未来几代人能够满足他们的需求。总之，能量守恒定律是支配所有物理过程的基本原则。它教会我们，能量是我们宇宙中的一个常数，总是在变化形式，但从未消失。通过掌握这个概念，我们可以更好地理解自然界，并在日常生活中做出明智的关于如何使用和节约能源的决策。当我们面临与能源消耗和气候变化相关的全球挑战时，能量守恒定律作为我们追求可持续性和创新的指导原则。