periods per second

简明释义

赫

英英释义

例句

1.To calculate the wave speed, you can multiply the wavelength by the number of periods per second.

要计算波速，可以将波长乘以每秒周期的数量。

2.In physics, the concept of periods per second helps us understand oscillatory motion.

在物理学中，每秒周期的概念帮助我们理解振荡运动。

3.A higher number of periods per second indicates a higher frequency of the signal.

更高的每秒周期数量表示信号的频率更高。

4.The frequency of the sound wave is measured in periods per second, which is also known as hertz.

声波的频率以每秒周期为单位测量，也称为赫兹。

5.The pendulum swings back and forth at a rate of three periods per second.

摆锤以每秒三个周期的速度来回摆动。

作文

Understanding the concept of frequency is essential in various fields, particularly in physics and engineering. One common way to express frequency is through the term 'periods per second.' This phrase refers to the number of complete cycles or oscillations that occur in one second. In scientific terms, this is often denoted as Hertz (Hz), where one Hertz is equal to one cycle per second. To illustrate this concept, consider a simple pendulum swinging back and forth. Each complete swing from one side to the other and back again constitutes one 'period.' If the pendulum completes five swings in a second, we would say it has a frequency of 5 periods per second, or 5 Hz.The relevance of periods per second extends beyond simple mechanical systems; it is crucial in understanding waves, sound, and light. For example, when discussing sound waves, the frequency of a sound wave determines its pitch. A high-frequency sound, such as a whistle, has many periods per second, resulting in a higher pitch, whereas a low-frequency sound, like a bass drum, has fewer periods per second, leading to a deeper sound.In electronics, the concept also plays a significant role. The functionality of alternating current (AC) power systems relies on the frequency of the current, which is measured in periods per second. In many countries, the standard frequency for AC power is 50 or 60 Hz, meaning the current alternates direction 50 or 60 times each second. Understanding this frequency is vital for engineers designing electrical systems, ensuring compatibility with appliances and devices.In addition to practical applications, the concept of periods per second also emerges in advanced scientific research. For instance, in quantum mechanics, the behavior of particles can be described in terms of their frequency and energy levels. The relationship between energy and frequency is given by Planck's equation, which shows that higher frequencies (more periods per second) correspond to higher energy photons. This principle is fundamental in understanding phenomena like the photoelectric effect, where light can eject electrons from a material depending on its frequency.Moreover, the study of periods per second is not limited to natural phenomena; it also applies to human-made systems. In telecommunications, data transmission rates are often expressed in terms of frequency. For instance, a signal that transmits data at a rate of 1 megabit per second (Mbps) can be understood in terms of the number of bits transmitted per cycle of the carrier wave, which itself is measured in periods per second.In conclusion, the term periods per second encapsulates a fundamental aspect of how we understand and measure various phenomena in our world. Whether it is in the context of sound, light, electrical systems, or advanced physics, recognizing the significance of frequency allows us to grasp the underlying principles governing these systems. By appreciating the concept of periods per second, we can better understand the complexities of both nature and technology, making it an invaluable part of our scientific literacy.

理解频率的概念在各个领域都是必不可少的，特别是在物理和工程中。表达频率的一种常见方式是通过术语“每秒周期数”。这个短语指的是在一秒钟内发生的完整周期或振荡的数量。在科学术语中，这通常用赫兹（Hz）表示，其中一个赫兹等于每秒一个周期。为了说明这一概念，可以考虑一个简单的摆钟来回摆动。每一次从一侧到另一侧再返回的完整摆动构成一个“周期”。如果摆钟在一秒钟内完成五次摆动，我们会说它的频率为每秒5个周期，或5 Hz。每秒周期数的相关性不仅限于简单的机械系统；它对于理解波、声音和光线至关重要。例如，在讨论声波时，声波的频率决定了其音调。高频声，例如口哨声，具有许多每秒周期数，导致音调较高，而低频声，例如低音鼓，具有较少的每秒周期数，导致声音较深。在电子学中，这个概念也起着重要作用。交流电（AC）电力系统的功能依赖于电流的频率，该频率以每秒周期数为单位进行测量。在许多国家，交流电的标准频率为50或60 Hz，这意味着电流每秒改变方向50或60次。理解这个频率对设计电气系统的工程师至关重要，以确保与电器和设备的兼容性。除了实际应用，每秒周期数的概念还出现在先进的科学研究中。例如，在量子力学中，粒子的行为可以用它们的频率和能级来描述。能量与频率之间的关系由普朗克方程给出，显示出较高的频率（更多的每秒周期数）对应于较高能量的光子。这一原理在理解光电效应等现象中是基础的，其中光可以根据其频率从材料中轰出电子。此外，对每秒周期数的研究不仅限于自然现象；它也适用于人造系统。在电信中，数据传输速率通常以频率表示。例如，以每秒1兆位（Mbps）传输数据的信号可以用承载波的每个周期传输的比特数来理解，而承载波本身则以每秒周期数来衡量。总之，术语每秒周期数概括了我们理解和测量世界各种现象的基本方面。无论是在声音、光、电力系统还是高级物理的背景下，认识到频率的重要性使我们能够掌握这些系统的基本原理。通过欣赏每秒周期数的概念，我们可以更好地理解自然和技术的复杂性，使其成为我们科学素养中不可或缺的一部分。