buoyant force

简明释义

浮力

英英释义

例句

1.The buoyant force acts on the submerged object, allowing it to float.

在浸没的物体上，浮力起作用，使其能够漂浮。

2.When you dive into the pool, the buoyant force helps you stay afloat.

当你跳入泳池时，浮力帮助你保持漂浮。

3.As the balloon rises, the buoyant force increases with the decrease in air density.

当气球上升时，随着空气密度的降低，浮力增加。

4.A ship floats because the buoyant force is greater than its weight.

船能够漂浮是因为其上的浮力大于它的重量。

5.Archimedes' principle states that the buoyant force is equal to the weight of the fluid displaced.

阿基米德原理指出，浮力等于排开的液体的重量。

作文

The concept of buoyancy is fundamental in understanding how objects behave when placed in a fluid. One of the key principles associated with this concept is the buoyant force, which is defined as the upward force exerted by a fluid on an object that is submerged or floating in it. This force is what allows boats to float on water and balloons to rise in the air. The buoyant force arises due to the pressure difference between the top and bottom of the submerged object, resulting from the weight of the fluid displaced by the object.To illustrate this principle, consider a simple example: a rubber duck floating on a pond. When the duck is placed in the water, it displaces a certain volume of water equal to its own weight. According to Archimedes' principle, the buoyant force acting on the duck is equal to the weight of the water displaced. If the weight of the duck is less than the buoyant force, it will float; if it is greater, the duck will sink.This relationship between weight and buoyant force can be quantified using a formula. The buoyant force can be calculated using the equation: F_b = ρ × V × g, where F_b is the buoyant force, ρ is the density of the fluid, V is the volume of the fluid displaced, and g is the acceleration due to gravity. This equation shows that the buoyant force depends on both the density of the fluid and the volume of the object submerged in it.Understanding the buoyant force is not only crucial for physics but also has practical applications in various fields. For instance, engineers must consider buoyancy when designing ships and submarines. A ship must be designed to ensure that its weight does not exceed the buoyant force generated by the water it displaces. Similarly, in the field of aviation, the principles of buoyancy are applied in designing hot air balloons, which rely on the buoyant force of heated air to ascend.Moreover, the buoyant force plays a significant role in natural phenomena as well. For example, it is responsible for the rising of warm air currents in the atmosphere, which can lead to the formation of clouds and weather patterns. In aquatic environments, fish and other marine creatures have adapted their bodies to regulate their buoyancy, allowing them to maintain their position in the water column without expending much energy.In conclusion, the buoyant force is a vital concept that explains the interaction between objects and fluids. Its implications stretch far beyond simple experiments in a classroom setting, influencing engineering designs, natural processes, and even our daily lives. By grasping the principles of the buoyant force, we gain a deeper appreciation for the physical world around us and the forces that govern it.

浮力的概念在理解物体在流体中行为时是基础性的。与这个概念相关的一个关键原理是浮力，它被定义为流体对浸没或漂浮在其中的物体施加的向上力。这种力量使得船只能够在水面上漂浮，气球能够在空气中上升。浮力的产生是由于浸没物体上下之间的压力差，这种压力差源于物体所排开的流体的重量。为了说明这一原理，我们考虑一个简单的例子：一只漂浮在池塘里的橡皮鸭。当鸭子放入水中时，它排开了等于自身重量的一定体积的水。根据阿基米德原理，作用在鸭子上的浮力等于排开的水的重量。如果鸭子的重量小于浮力，它将漂浮；如果大于，则鸭子会下沉。这种重量和浮力之间的关系可以通过公式量化。浮力可以使用以下公式计算：F_b = ρ × V × g，其中F_b是浮力，ρ是流体的密度，V是排开的流体体积，g是重力加速度。这个公式表明，浮力依赖于流体的密度和物体浸没在其中的体积。理解浮力不仅对物理学至关重要，还有许多实际应用。在工程领域，设计船舶和潜艇时必须考虑浮力。船舶的设计必须确保其重量不超过由其排开的水所产生的浮力。同样，在航空领域，浮力原理被应用于热气球的设计，热气球依靠加热空气的浮力上升。此外，浮力在自然现象中也扮演着重要角色。例如，它负责在大气中温暖气流的上升，这可能导致云的形成和天气模式的变化。在水生环境中，鱼类和其他海洋生物已经适应了它们的身体以调节浮力，使它们能够在水柱中保持位置而不消耗太多能量。总之，浮力是一个重要的概念，解释了物体与流体之间的相互作用。它的影响远远超出了课堂上的简单实验，影响着工程设计、自然过程，甚至我们的日常生活。通过掌握浮力的原理，我们对周围的物理世界及其支配力量有了更深刻的理解。