物理的英文译语怎么说

外语更新时间:2025-05-23 10:06:24

Crome是什么意思me的用法读音典-心灵鸡汤在线阅读

2023年4月19日发(作者：鬼屋魔影小游戏)2.1 Introduction(引言)
We begin our study of the physical universe by examining objects in motion. The
study of motion . whose measurement. more than 400 years ago gave birth to
physics. is
called kinematics.
Much of our understanding of nature comes from observing the motion of
objects. In
this chapter we will develop a description for the motion of a single point as it moves
through space. Although a point is a geometrical concept quite different from
everyday
objects such as footballs and automobiles, we shall see that the actual mot10n of
many
objects is most easily described as the motion of a single point (the \"center of
mass\"). plus
the rotation of the object about that point. Postponing a discussion of rotation. let us
begin he-re with a description of a single point as it moves through space.

Space and time
Kinematics is concerned with two basic questions. \"Where?\" and \"When?\". Though
the questions are simple. the answers are potentially quite complicated if we inquire
about
phenomena outside our ordinary daily experiences. For example. the physics of very
high
speeds, or of events involving intergalactic distances or submicroscopic dimensions.
is
quite different from our common-sense ideas. We will discuss the… interesting
subjects in
later chapters. For the present we shall adopt the space and time of Newton-those
concepts we gradually developed as a result of our everyday experiences.
Space is assumed to be continuously uniform and isotropic. These two terms
mean
that space has no \'graininess\' and that whatever its properties may be, they are
independent of any particular direction or location. in the words of Isaac Newton.

\' Absolute space . in its own nature . without relation to anything external .
remains always
similar and unmovable. \" Every object in the universe exists at a particular location in
space. and an object may change its location Ly moving through space as time goes
on. We
specify the Location of a particular point in space by its relation to a frame of
reference.
Time, according to Newton, is also absolute in the sense that it \"flows on\" at a
uniform rate . We cannot speed it up or slow it down in any way. in Newton\'s words,
\" Absolute. true. and mathematical time . of itself . and from its own nature .
flows equably
without rela登乐游原杜牧 tion to anything external. and by another name is called duration. \"
Time is
assumed to be continuous and ever advancing. as might be indicated by a clock.
Space and time are wholly independent of each other. though it is recognized
that all
physical objects must ex关于雨的古诗整首 ist simultaneously in both space and time.
Remarkably . many of these traditional ideas turn out to be naive and
inconsistent with
experimental evidence. The world is just different from the picture we form from our
common-sense. intuitive ideas. Space and time, by themselves. arc concepts that
arc
difficult (or perhaps impossible) to define in terms of anything simpler. However. we
can
measure space and time in unambiguous ways. We define certain operations by
which we
obtain numerical measurements of席慕蓉经典作品 these quantities using rulers and clocks. based
upon
standard units of space and time.
For many years. our standard of time was based on astronomical observations of
the earth\'s
rotation. Because of the variations in the earth’s rotation . in 1967 the 13th
General Conference on
Weights and Measures. attended by 38 nations. adopted an atomic standard for
time.
Similarly. our former standard of length was the distance between two marks on

platinum-iridium bar. kept at Sevres. France. in 1960. the fundamental length
s艨艟怎么读 tandard
was redefined in terms of the wavelength of light emitted during a transition
between two.
The standard unit鹳的拼音 s of time and length may be described as follows:
An interval of time. The fundamental unit is the second (s) . which by
international
agreement is defined as the duration of 9 192 631 770 periods of radiation
corresponding to
the transition between the two lowest energy levels in the atomic isotope cesium
133.
An interval of length. The fundamental unit is the meter (m). which is defined
independently of the time interval Before 1983 . by international agreement the
meter was
defined as exactly 1 650 763. 73 wavelengths of the orange light emitted from the
isotope
krypton 86. in November 1983. the length standard was defined as the distance that
light
travels in a vacuum in l1299 792 458 second.
l angstrom(A) -. 10-l0 m l micron (u or um)10-6 m
2.1简介（引言）
我们开始研究宇宙的物理研究物体的运动。本
运动研究。其测量。400多年前，诞生了物理学。是
称为运动学。
我们的许多认识自然来观察物体的运动。在
这一章我们将开发一个描述运动的一个单点移动
通过空间。虽然是一个几何概念完全不同的生活
对象，如足球和汽车，我们应看到，实际运动许多
对象是最容易被描述为一个单一的运动点（“质心”）。加上
对象的旋转这一点。推迟讨论旋转。让我们

一开始he-re描述单点它通过移动空间。
时间和空把酒问青天的意思间
运动学是有关的基本问题。”在哪儿。什么时候。虽然。
问题很简单。答案可能是相当复杂的，如果我们探询
在我们的日常经验现象。比如说呢。物理非常高
速度，或事件涉及星际距离或微观层面。是
完全不同于我们的常识。我们将讨论……有趣的科目
后面的章节。目前我们所应采取诗朗诵我骄傲我是中国人的时间和空间的牛顿
概念逐渐导致了我们的日常经验。
空间被认为是连续均匀和各向同性。这些术语的意思
空间没有“粒度”，无论其性质可能是，他们是
独立于任何特定的方向或位置。在对艾萨克词的牛顿。
绝对空间。其本身性质。没有与任何外部。永远保持
相似及不动的。”每一个物体在宇宙中存在，在某一特定位置
空间。和对象可以改变其位置的移动通过空间随着时间的流逝。我们
指定的位置，一个特定的点在空间的关系参考框架。
同时，根据牛顿，也是绝对的意义上说，它“流”在
均匀速率。我们不能加快或者减慢以任何方式。在牛顿的话，
瑞典伏特加。真的。和数学的时间。本身。从其本身的性质。均匀流动
没有与任何外部。和另一个名字叫时间。”时间是
假定连续不断进步。可能是由一个时钟。
时间和空间是完全相互独立的。虽然它是公认的，所有的

物理对象必须同时存在于空间和时间。
值得注意的。许多这些传统的想法是幼稚和不符合
实验证据。世界只是从不同的图片从我们
常识的。直观的想法。空间和时间，由自己。弧，弧的概念
困难（或不可能）定年华何日不离伤义在任何事情更简单。然而。我们可以
测量时间和空间明确的办法。我们定义的某些操作
得到的数值测量这些数量使用统治者和钟表。基础上
标准单位的时间和空间。
许多年。我们的标准时间是根据天文观测的地球
旋转的。由于地球自转变化。1967第十三届大会上
度量衡。参加了38个国家。采用原子标准时间。
同样的。我们以前的标准长度的两点之间的距离标志
铂铱棒。保持在塞夫尔。法国。在1960。基本的长度标准
被重新界定发光波长在两国之间的过渡。
标准时间单位和长度可描述如下：
间隔时间。基本单位是秒（）。由国际
协议的定义是时间9 192 631 770期对应的辐射
两国之间的过渡时期的最低能量水平的同位素铯133原子。
间隔长度。基本单位是米（米）。它的定义是
独立前的时间间隔1983。根据国际协议，米
定义为1 650 763。73波长的橙光发射出的同位素
氪86。十一月1983。长度标准被定义为距离光

在真空中l1299 792 458秒。
我埃（一）—。我10-l0微米（或嗯）10米