首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Many scientists consider physics as the prototype of a science, and indeed, physics exhibits a number of features which can be r
Many scientists consider physics as the prototype of a science, and indeed, physics exhibits a number of features which can be r
admin
2016-10-15
40
问题
Many scientists consider physics as the prototype of a science, and indeed, physics exhibits a number of features which can be regarded as highly desirable. 【F1】
For example, the phenomenon it deals with can be described in precise terms and the relevant variables quantitatively measured; an enormous variety of phenomena may be explained by means of a few fundamental laws, which are formulated in mathematical terms and allow physicists to make quantitative predictions.
It is therefore of particular interest to discuss what kind of assessment is used within the physical sciences. At the same time, the historical development of physics has taught us to exercise caution with respect to the goals which we may achieve.【F2】
Though we are inclined to believe that the laws of physics are fundamental, their development has shown that even such laws may be applicable only to certain classes of phenomena.
When more refined measurements are made, phenomena may appear whose explanation requires still more basic laws. Examples are the laws of classical mechanics, which at the atomic level had to be replaced by the laws of quantum mechanics.【F3】
Mechanics valid for particles at comparatively small speeds had to be replaced by the theory of relativity for particles at speeds coming close to that of light.
The belief in complete predictability has been shaken twice. First, around 1925 with the advent of quantum mechanics, it became clear that at the microscopic, atomic level events cannot be predicted with absolute precision.【F4】
However, at the macroscopic dimension of our daily life these "statistical" effects are wiped out, and we can safely predict the path of a rocket sent to the Moon or to Jupiter.
But it has recently become clear that even in macroscopic physics some phenomena cannot be predicted with a certain precision—which sheds new light on the limits of weather forecasting. The corresponding phenomena are called "deterministic chaos" and are the subject of research of new branches of theoretical physics(and mathematics). Finally, we must not overlook that, as in any other science, there are certain trends or "fashions" which play a temporary role in the development of physics. Such fashions are typical of cooperative effects in the scientific community. For example, dispersion relations in high-energy physics were in vogue in this field for a while, but today few are concerned with the approach. In spite of these remarks, physics still possesses an enormous degree of precision. Even if a single event cannot be predicted with absolute precision, it is still possible to make statistical predictions which can be checked by repeating the corresponding experiment.【F5】
This possibility distinguishes physics from the historical sciences, where the course of events can never be repeated. It might be worth mentioning that events in our brain can never be totally repeated, due to memory and to learning.
【F3】
选项
答案
适用于以较低速度运动的粒子的力学,对于以接近光速运动的粒子,必须用相对论取代。
解析
转载请注明原文地址:https://jikaoti.com/ti/xNT7FFFM
0
考研英语一
相关试题推荐
Aspeopleinrichcountriesknowverywell,eatingtoomuchfoodandburningtoofewcaloriesiswhyasubstantialnumberofus
PresidentBarackObamaclaimedprogressWednesdayinhissecond-termdrivetocombatclimatechangebutsaidmoremustbedonet
PresidentBarackObamaclaimedprogressWednesdayinhissecond-termdrivetocombatclimatechangebutsaidmoremustbedonet
Doctorshavetreatedthefirstreportedcaseof"Internetaddictiondisorder"broughtonbyexcessiveuseofGoogleGlass.I
Expressionismisanartisticstyleinwhichtheartistseekstodepictnotobjectiverealitybutratherthesubjectiveemotions
Expressionismisanartisticstyleinwhichtheartistseekstodepictnotobjectiverealitybutratherthesubjectiveemotions
Expressionismisanartisticstyleinwhichtheartistseekstodepictnotobjectiverealitybutratherthesubjectiveemotions
Expressionismisanartisticstyleinwhichtheartistseekstodepictnotobjectiverealitybutratherthesubjectiveemotions
WhenNeilArmstrongandBuzzAldrinreturnedfromthemoon,theircargoincludednearlyfiftypoundsofrockandsoil,whichwer
随机试题
A.红细胞管型B.白细胞管型C.脂肪管型D.颗粒管型E.肾小管上皮细胞管型肾盂肾炎
A.槲皮素B.大豆素C.甘草素D.芹菜素E.橙皮查耳酮苷
某工程的施工合同工期为16周,项目监理机构批准的施工进度计划见图2(时间单位:周)。各工作均按匀速施工。施工单位的报价单(部分)见表2。工程施工到第4周时进行进度检查,发生如下事件:事件1:A工作已经完成,但由于设计图纸局部修改,实际完成
通常,垄断程度越高的行业,证券投资风险( )。
电子银行包括()。
房地产开发企业在市场营销活动中,进行市场细分和评估、市场定位等工作的直接目的是()。
货币均衡是用来说明货币供给与货币需求的关系,其特征有( )。
下列二次型中是正定二次型的是()
TheBritishpolicemanhas______nicknamesmentionedinthepassage.Oneofthenicknamesforthepoliceman,"peeler"______.
A、Writetheirlabreports.B、FindoutProfessorSmith’sschedule.C、Interviewsomehighschoolstudents.D、Finishtheirchemist
最新回复
(
0
)