a首先我先介绍一下自己 First I first introduce[translate] a不要浪费生命 不要浪费生命[translate] aBut do not suffer through life with his woman. 但不要通过生活遭受与他的妇女。[translate] aWhere there is a sound,there is sound wave. 那里有声音,有声波。[translate]...
海浪:wave 声音:sound 听到:hear 海:sea 或 ocean 发音技巧: wave:/weɪv/,注意元音 /eɪ/ 的发音,类似于“way”中的“ay”。 sound:/saʊnd/,注意双元音 /aʊ/ 的发音,类似于“how”中的“ow”。 hear:/hɪr/,注意 /ɪr/ 的发音,类似于“ear”中的“ear”。 连读与弱读: I hear...
1、There is a sound wave,the frequency of the wave f=440Hz,and the velocity V=340m/s,Find the wavFind the wave length of the sound wave? 相关知识点: 试题来源: 解析 楼主,这个题的意思是:有个声波,频率为440赫兹,速度为340赫兹,求波长.波长(那个符号我打不出来)=V*T(周期)=V/f=340/...
So what type of wave is sound? Sound waves fall into three categories: longitudinal waves, mechanical waves, and pressure waves. Keep reading to find out what qualifies them as such. Longitudinal Sound Waves - A longitudinal wave is a wave in which the motion of the medium’s particles is...
The loudness, or intensity, of sound is measured in decibels. For each increase of 10 decibels, the sound wave has 10 times as much energy. For example, a sound of 20 decibels is twice as loud as one of 10 decibels, but has 10 times the energy. The softest sound humans can hear, ...
Just the time when the sound wave which is emitted from the 2nd speaker and the aforementioned 1st speaker whichPROBLEM TO BE SOLVED: To provide an apparatus that generates an almost ideal parallel traveling wave acoustic field, preferably a one-dimensional parallel traveling wave acoustic field, ...
百度试题 结果1 题目28 A sound wave is travelling through water.What is a possible speed for the wave? C A 150 m/s B 300m/s C 1500m/s D 5000 m/s 相关知识点: 试题来源: 解析 C 反馈 收藏
A mechanical wave is transverse when all the particles of the medium, which are solid or liquid (and never gas), vibrate perpendicularly at right angles, up and down, and continue to move in the direction of the wave. For example, the ripples on the surface of a lake are transverse wav...
Sound-wave "wave in an elastic medium by which sound spreads" is by 1848. Sound barrier, in reference to supersonic flights, is from 1939. Sound check is by 1977; sound effect is by 1909, originally live accompaniment to silent films. The experts of Victor ... will ... arrange for ...
6 (a)Fig. 6.1 represents the waveform of a sound wave. The wave is travelling at constant speed.displacement of particles distance along wave Fig.6.1(i) On Fig. 6.1,1. label with the letter X the marked distance corresponding to the amplitude of the wave,[1]2. label with the letter ...