universal gravitation

简明释义

万有引力

英英释义

例句

1.Isaac Newton formulated the law of universal gravitation, which explains how objects attract each other.

艾萨克·牛顿提出了万有引力定律，解释了物体之间是如何相互吸引的。

2.Satellites orbit Earth due to the universal gravitation that pulls them toward the planet.

卫星绕地球轨道飞行是因为万有引力将它们拉向地球。

3.In physics, universal gravitation helps us calculate the force between two masses.

在物理学中，万有引力帮助我们计算两个质量之间的力。

4.The universal gravitation theory predicts that the gravitational force decreases with distance.

万有引力理论预测，引力会随着距离的增加而减小。

5.The concept of universal gravitation is essential for understanding planetary motion.

理解行星运动时，万有引力的概念是至关重要的。

作文

The concept of universal gravitation is one of the fundamental principles of physics that explains how objects interact with each other through gravitational forces. Proposed by Sir Isaac Newton in the 17th century, this law states that every point mass attracts every other point mass in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This means that the larger the mass of an object, the stronger its gravitational pull, and the farther apart two objects are, the weaker the gravitational force between them.

Understanding universal gravitation is crucial for several reasons. Firstly, it helps us comprehend the motion of celestial bodies. For instance, the orbits of planets around the sun can be explained using this law. The sun, being a massive body, exerts a significant gravitational force on the planets, keeping them in orbit. Without universal gravitation, our understanding of the solar system would be drastically different. We would not be able to predict the positions of planets or understand phenomena such as eclipses and retrograde motion.

Moreover, the concept of universal gravitation extends beyond our solar system. It plays a vital role in the formation of galaxies, stars, and even black holes. When a cloud of gas and dust in space collapses under its own gravity, it can lead to the formation of new stars. The balance between gravitational collapse and internal pressure from nuclear fusion in a star determines its lifecycle. Understanding this balance is essential for astrophysicists studying the evolution of the universe.

In addition to its astronomical implications, universal gravitation also has practical applications on Earth. It affects everything from how we launch satellites into orbit to how we predict tides in our oceans. For example, when launching a satellite, engineers must calculate the gravitational pull of the Earth and the velocity needed to achieve orbit. Similarly, the rise and fall of ocean tides are influenced by the gravitational pull of the moon and the sun. These real-world applications highlight the importance of understanding universal gravitation in various scientific fields.

Furthermore, the discovery of universal gravitation paved the way for further advancements in physics. It laid the groundwork for Einstein's theory of general relativity, which redefined our understanding of gravity. While Newton’s law describes gravity as a force, Einstein proposed that gravity is the curvature of spacetime caused by mass. This shift in perspective has profound implications for modern physics and our understanding of the universe.

In conclusion, the concept of universal gravitation is not just a theoretical idea; it is a fundamental principle that governs the behavior of objects in the universe. From the motion of planets to the functioning of satellites and the formation of stars, universal gravitation plays a crucial role in both the cosmic and terrestrial realms. Its significance cannot be overstated, as it continues to influence scientific research and our understanding of the natural world. By grasping the principles of universal gravitation, we gain insight into the intricate workings of the universe and our place within it.

“万有引力”是物理学的基本原理之一，解释了物体如何通过引力相互作用。这个法则由艾萨克·牛顿在17世纪提出，指出每个点质量都以一种力吸引宇宙中的其他点质量，这种力与它们质量的乘积成正比，与它们之间距离的平方成反比。这意味着物体的质量越大，引力越强，而两个物体之间的距离越远，引力就越弱。

理解“万有引力”至关重要，原因有很多。首先，它帮助我们理解天体的运动。例如，行星围绕太阳的轨道可以用这个法则来解释。太阳作为一个巨大天体，对行星施加显著的引力，使它们保持在轨道上。如果没有“万有引力”，我们对太阳系的理解将会大不相同。我们将无法预测行星的位置，也无法理解日食和逆行等现象。

此外，“万有引力”的概念超越了我们的太阳系。它在星系、恒星甚至黑洞的形成中起着至关重要的作用。当太空中的气体和尘埃云在自身引力作用下坍缩时，可能导致新恒星的形成。引力坍缩与恒星内部核聚变产生的压力之间的平衡决定了恒星的生命周期。理解这种平衡对研究宇宙演化的天体物理学家至关重要。

除了天文学的影响外，“万有引力”在地球上的实际应用也非常广泛。它影响着我们从如何发射卫星到如何预测海洋潮汐的一切。例如，在发射卫星时，工程师必须计算地球的引力以及达到轨道所需的速度。同样，海洋潮汐的涨落受月球和太阳的引力影响。这些现实世界的应用突显了理解“万有引力”在各个科学领域的重要性。

此外，“万有引力”的发现为物理学的进一步发展铺平了道路。它为爱因斯坦的广义相对论奠定了基础，重新定义了我们对引力的理解。虽然牛顿的法则将引力描述为一种力，但爱因斯坦提出引力是由质量造成的时空弯曲。这种视角的转变对现代物理学和我们对宇宙的理解具有深远的影响。

总之，“万有引力”不仅仅是一个理论概念；它是支配宇宙中物体行为的基本原则。从行星的运动到卫星的运行，再到恒星的形成，“万有引力”在宇宙和地球领域都发挥着至关重要的作用。它的重要性不容低估，因为它继续影响科学研究和我们对自然界的理解。通过掌握“万有引力”的原理，我们获得了对宇宙复杂运作及其在其中位置的深入见解。