gravitational constant

简明释义

引常数

英英释义

例句

1.In physics, the gravitational constant 引力常数 is denoted by the letter G.

在物理学中，引力常数用字母G表示。

2.The gravitational constant 引力常数 helps us understand how objects attract each other in space.

引力常数帮助我们理解物体在太空中如何相互吸引。

3.The value of the gravitational constant 引力常数 is essential for calculating the gravitational force between two masses.

引力常数的值对于计算两个质量之间的引力是至关重要的。

4.Scientists often use the gravitational constant 引力常数 to determine the mass of celestial bodies.

科学家们常常使用引力常数来确定天体的质量。

5.To calculate the weight of an object on different planets, we need to know the gravitational constant 引力常数 for each planet.

要计算一个物体在不同星球上的重量，我们需要知道每个星球的引力常数。

作文

The universe is governed by a set of fundamental forces, and one of the most significant among them is gravity. The strength of this force is determined by a value known as the gravitational constant. This constant, denoted by the letter G, plays a crucial role in our understanding of how objects interact with each other in space. It was first introduced by Sir Isaac Newton in the 17th century and later refined by Albert Einstein in his theory of general relativity.To comprehend the importance of the gravitational constant, it is essential to grasp what gravity is. Gravity is the force that attracts two bodies towards each other. The larger the mass of an object, the stronger its gravitational pull. For instance, the Earth, being significantly larger than a person, exerts a much stronger gravitational force, which is why we remain grounded on its surface. The gravitational constant quantifies this attraction in a mathematical form, allowing scientists to calculate the force of gravity between two masses.The formula for calculating gravitational force is given by Newton's law of universal gravitation, which states that the force (F) between two objects is equal to the product of their masses (m1 and m2) multiplied by the gravitational constant (G), divided by the square of the distance (r) between their centers. Mathematically, this can be expressed as:F = G * (m1 * m2) / r²This equation highlights the significance of the gravitational constant in determining how strongly two objects will attract each other. It is a fundamental constant of nature, with a value of approximately 6.674 × 10⁻¹¹ N(m/kg)². Without this constant, we would not be able to accurately predict the behavior of celestial bodies or understand the dynamics of our universe.Moreover, the gravitational constant is not just relevant in theoretical physics; it has practical applications as well. For example, when launching satellites into orbit, engineers must consider the gravitational forces at play to ensure that these satellites remain in stable orbits around the Earth. The calculations involving the gravitational constant allow for precise trajectories and timings, which are critical for the success of space missions.Interestingly, the gravitational constant is one of the few constants in physics that remains poorly understood. While we have a precise value for it, the reasons behind its specific numerical value are still a mystery. This uncertainty has led to various theories and experiments aimed at uncovering more about the nature of gravity and the gravitational constant. Some scientists even speculate that it may vary in different regions of the universe or under extreme conditions, which could have profound implications for our understanding of cosmology.In conclusion, the gravitational constant is a cornerstone of gravitational physics, providing the framework for understanding how masses interact through the force of gravity. Its applications stretch from the everyday phenomena we experience on Earth to the vast complexities of the cosmos. As we continue to explore the universe, the gravitational constant will undoubtedly remain a key element in unraveling the mysteries of gravity and the fundamental workings of our universe.

宇宙受一系列基本力的支配，其中最重要的之一就是重力。这个力量的强度由一个被称为引力常数的值决定。这个常数用字母G表示，在我们理解物体如何在空间中相互作用方面起着至关重要的作用。它在17世纪首次由艾萨克·牛顿爵士提出，后来在爱因斯坦的广义相对论中得到了进一步的完善。要理解引力常数的重要性，首先需要掌握重力的概念。重力是吸引两个物体彼此靠近的力量。物体的质量越大，其重力吸引力就越强。例如，地球的质量远大于一个人，因此地球施加的重力更强，这就是为什么我们能够稳稳地站在地面上的原因。引力常数以数学形式量化了这种吸引力，使科学家能够计算两个物体之间的重力。计算重力的公式是牛顿万有引力定律，该定律指出，两个物体之间的力量（F）等于它们的质量（m1和m2）的乘积乘以引力常数（G），再除以它们中心之间距离（r）的平方。数学上可以表示为：F = G * (m1 * m2) / r²这个方程突显了引力常数在确定两个物体将相互吸引的程度中的重要性。它是自然的基本常数，值约为6.674 × 10⁻¹¹ N(m/kg)²。没有这个常数，我们将无法准确预测天体的行为或理解我们宇宙的动态。此外，引力常数不仅在理论物理学中相关，它也有实际应用。例如，在将卫星发射入轨道时，工程师必须考虑所涉及的重力，以确保这些卫星在地球周围保持稳定的轨道。涉及引力常数的计算允许精确的轨迹和时机，这对太空任务的成功至关重要。有趣的是，引力常数是物理学中少数几个仍然不太理解的常数之一。虽然我们有一个精确的值，但其特定数值背后的原因仍然是一个谜。这种不确定性导致了各种理论和实验，旨在揭示有关重力和引力常数的更多信息。一些科学家甚至推测，在宇宙的不同区域或极端条件下，它可能会有所变化，这可能对我们理解宇宙学产生深远影响。总之，引力常数是重力物理学的基石，为理解质量如何通过重力相互作用提供了框架。它的应用从我们在地球上经历的日常现象延伸到宇宙的复杂性。随着我们继续探索宇宙，引力常数无疑将继续成为揭示重力和我们宇宙基本运作奥秘的关键元素。