首页 / 一列横波在t=0时刻的波形图如右图中实线所示,t=1 s时刻波形图如图中

一列横波在t=0时刻的波形图如右图中实线所示,t=1 s时刻波形图如图中

一列横波在t=0时刻的波形图如右图中实线所示,t=1 s时刻波形图如图中的虚线所示，由此可以判断（    ）

A.该列波的周期一定是4 s        B.波长一定是4 m

C.振幅一定是2 cm                 D.波速一定是1 cm/s

答案

BC

解析：从图中可知，波长为4 m，振幅为2 cm.由于波的传播方向可能向左也可能向右，所以波速有许多可能的数值，同样它的周期也有许多可能的数值.故正确的选项为BC.

相关题目

The day breaks，______ the birds are singing. A. because     B. as    
The day breaks，______ the birds are singing. A. because     B. as     C. since     D. for
________, what he has said _______ to be _______ as we haven’t investigated th
________, what he has said _______ to be _______ as we haven’t investigated the site yet. A. Obviously; remains; proved           `B. Fundamentally; is remained; balanced C. Traditionally;
He has moved to another city, but we write to each other      .      A
He has moved to another city, but we write to each other      .      A. day by day              B. arm in arm        C. side by side       D. from time to time 
Do you think that living a hungry life is last century’s story? Well, it may
Do you think that living a hungry life is last century’s story? Well, it may be this century’s headline. The world has growing worries about a global food shortage. Right now, there are still 8
已知是三个不同的平面，命题“∥且”是真命题，如果把中
已知是三个不同的平面，命题“∥且”是真命题，如果把中的任意两个换成直线，另一个保持不变，在所得的所有新命题中，真命题有（    ）    A. 0
12. — I haven't seen Mr. White for weeks. — What _____ to him? A. must have
12. — I haven't seen Mr. White for weeks. — What _____ to him? A. must have happened                B. may have happened C. can have happened                  D. m
_______ you are alone at home, why don’t you go with us to the party? A Even
_______ you are alone at home, why don’t you go with us to the party? A Even though   B As though    C So that    D Now that
请阅读尼采的一首小诗，按要求作文。处世之道尼采别爬上
请阅读尼采的一首小诗，按要求作文。处世之道尼采别爬上山顶去，也别站在山脚，打从半高处看，这世界最美好。本诗表达的是尼采的一种人生观和

最新题目

某同学为了“探究液体内部的压强特点”，将一个六个面用
用来检验Fe3+是否存在的最佳试剂是（    ） A.H2S       
1688年，女婿登基，丈人逃亡的那场“光荣革命”，是英国资
小宁在探究练习使用电压表时，把电压表接成了如图所示的
南北半球的分界线为（     ） A、赤道          B、北
新疆维吾尔自治区成立以来，在党和政府的正确领导下，各
甲工厂有某种原料120吨，乙工厂有同样的原料96吨，现在每天
如图，两个边长相等的正方形ABCD和EFGH，正方形EFGH的顶点E固
乔布斯说过，消费者不是爱买便宜的商品，而是喜欢占便宜
等边三角形的边长为2,它绕其一边所在的直线旋转一周,则所
  有4种混合溶液，分别由等体积0.1mol·L－1 的两种溶液混合
以“和谐中华、活力山东”命名的第十一届全运会会徽，创
Having said goodbye to his parents, Alvin, with his wife and one-year-old son, s
若x,y是正数，则（x+）2+(y+)2的最小值是(    )A.3        
2006年扬州获得的荣誉称号是（    ） A．联合国人居环境奖
Lost & Found That night, when I arrived at the door of my building, I noti
以“往事如风”为题，自定角度，自选文体写一篇不少于800
给下面这则消息加的标题最准确的一项是（3分）        
根据中国国情，党和政府在某些地区先后设立了民族自治区