题库网 (tiku.one)

 找回密码
 立即注册

 

      

上传图片附件

未使用图片

小贴士: 允许的图片文件格式为: gif, jpg, jpeg, png, webp，上传完成后会在上方生成预览，用鼠标连续双击缩略图，或拖动缩略图，该图片就被绑定至本题，显示在题目下方

本次作答已使用

小贴士: 此栏目显示的是当前作答使用的所有图片，绑定到某一题目的图片同时会显示在该题目下方; 删除使用的图片会将其转移到<未使用图片>类别


习题练习：Physics Unit12: Sound
本习题练习来源于题库网 (https://tiku.one)，是在线习题练习的打印版，您也可以访问本平台网站(https://tiku.one/)直接在线完成(注册并登录账号后在首页左侧输入试卷号 70 即可在线作答)，，作答电子化后可随时回放，查看每题答案与详细解析，搜藏保存任意题目；教师使用本平台可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力。本试卷的直接作答链接 https://tiku.one/test70.html
 作者: admin  发布日期: 2022-09-26 09:56    总分: 87分  得分: _____________

答题人: 匿名未登录  开始时间: 22年08月07日 09:59  切换到: 整卷模式

标记此题
1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following is a feh awp*+u,y;u6m9 rbdalse statement?

参考答案:    
标记此题
2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In general, sound is conducted fastestpc .7 ,ptz1;(zxmjn;xcm7bb f through

参考答案:    
标记此题
3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the speed ofa( l4 s u txx3s3nhe)-hquf/)h sound in a steel rod?

参考答案:    
标记此题
4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As the temperature of the air increases, what happens to the velocitye1 q /bgjn6;c8 ey7epq of sound? gj6n7 b;/1eqc8yeeqp(Assume that all other factors remain constant.)

参考答案:    
标记此题
5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Compared to the velocity of a 400 Hz b 5ag iph 5drhrsfr2hk3-)fqaxg07 ( )sound, the velocity of a 200 Hz sound through api frgr-baxhfq( 72rh)dha )3g55k0sir is

参考答案:    
标记此题
6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Compared to the wavelenax:isuq-ju s u25oze a+;2f8ygth of a 400 Hz sound, the wavelength of a 200 Hz sound in fieo; uajx:qy sa82 -z+u52 suair is

参考答案:    
标记此题
7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Sound vibrations with f/g +vst v-11dzvkra 4yrequencies greater than 20,000 Hz are called

参考答案:    
标记此题
8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Sound vibrations with frequen;xg c;(1x 3xalwlwma 03ar/twcy less than 20 Hz are called

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Suppose that a sound source is emitting waves uniformly in allt yf hfh dvspmp 17,cnm*)(/x) directions. If you move to a point twice as far away from the source, the frequenhs)vm(7, tcmfnyp*h/ xfd 1p)cy of the sound will be

参考答案:    
标记此题
10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For spherically diverging waves, intensity)+w-,xs: ihid:jx )dwsoa) ec is proportional to

参考答案:    
标记此题
11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The intensity of a point source at a distance d from the source is I. 5+ e1pb+e58vu3a jrf ema:kje What is the intensityereauejbp+ m1 55 j8k3af+ ve: at a distance 2d from the source?

参考答案:    
标记此题
12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You double your distance from a sound source that is radi+xp8 a/ 6-eghffrb*b sating equally in all directions. What happens to the intensity of the souh ber/xfg 6fsb-+*a8pnd? It reduces to

参考答案:    
标记此题
13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You double your distance 9fes14i: dxw- z)0xjr7 b*bx/pchi fj:jk3rkfrom a sound source that is radiating equally in all directions. What happens to the intensity levekf x)is:picjj 491dxrbwzr3 :- /kj7bf 0 x*hel of the sound? It drops by

参考答案:    
标记此题
14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following increases as a sound bec6 ec4 kabluxey9:q,s7omes louder?

参考答案:    
标记此题
15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You move slowly towa)q-w/s dfi+zgcbw6it a6c+ 1ard a speaker emitting a pure tone. What characteristic of the sound increas/+s6-+z d qf )1i tg6wwabccaies?

参考答案:    
标记此题
16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines "loudness" kv8a-hhe*6kp gw98 l vof a musical note?

参考答案:    
标记此题
17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines the "pitch" of a musical notelpct6n7y 4 zj2zck8 x(?

参考答案:    
标记此题
18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When sound passes from air ist faw8: /jgs)nto water

参考答案:    
标记此题
19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Pressure and displacement waves areojps4 r/e*rq .;y jwx/

参考答案:    
标记此题
20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider the standing wave on a guitgc pm cuv*1-wc6 *dyp7ar string and the sound wave generated by the guitar as a result of t cmp y-p6gvdu7* cwc1*his vibration. What do these two waves have in common?

参考答案:    
标记此题
21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a resonating pipe which is open at both ends, c,70*ze1e( n shkcbq ithere

参考答案:    
标记此题
22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider an open pipe of length L. What are the wavelengths of the three lowe 9o*v)jwwippa.7e4r q c oo3e)st tones produced by this pie*. oi q3)) ecrp4 9wpvwooja7pe?

参考答案:    
标记此题
23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The lowest tone to resonate in an open pipe of length L i(cr u*rkpe.4 hs 200 Hz. Which one ofrr .4 hkpeu(c* the following frequencies will not resonate in the same pipe?

参考答案:    
标记此题
24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An open pipe of length L is resonating at its fundamental frequency. Whi*0f s +njcuvj4ch statemenjj s0cv*uf4 +nt is correct?

参考答案:    
标记此题
25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a resonating pipe which is open at one end and closed at the other, therskddkae*jak g,0y.1z2;t+ ys e

参考答案:    
标记此题
26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a closed pipe of lengt) spy fh8qtx)34 uid/qh L. What are the wavelengths of the three lowest tones q/)xdp4iu)8ft3 s q hyproduced by this pipe?

参考答案:    
标记此题
27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The lowest tone to resonate in a closeqh mv pfcxz8h4+m 36(vd pipe of length L is 200 Hz. Which of the following frequencies will not resonate in t4 vq6+h( xc83pmv zmfhhat pipe?

参考答案:    
标记此题
28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A pipe of length L closed at one end is r-*r f0k1pr qm0 twp3nmesonating at its fundamental frequency. Which statemer0 n0p1 wpt3-mmfrk*qnt is correct?

参考答案:    
标记此题
29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A person stands between two speakers driven by the same source. 4s1 mp g0 :6kbuc9cgee tkiyp2bh)6d; Each speaker prodg ke0peyct:9gdb4simhb6 p6u k2); 1cuces a tone with a frequency of 200 Hz on a day when the speed of sound is 330 m/s. The person is
1.65 m from one speaker and 4.95 m from the other. What type of interference does the person sense?

参考答案:    
标记此题
30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In order to produce beats, the two sound m+;q n4lm40)sw5f io6k2bi gvend xu2waves should have

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two pure tones are sounded together and a particular beat fr-+0c wrogg*o4c( hr uaequency is heard. What happens to the beat fag- wh rc*+cgur(oo04requency if the frequency of one of the tones is increased?

参考答案:    
标记此题
32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The Doppler shift explap/njs 2mp9wih7 h7rx (ins

参考答案:    
标记此题
33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A sound source approaches a statiorv)a* ytx a*p,nary observer. The frequency heard by the observer is *,a*)rayvptx

参考答案:    
标记此题
34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A sound source departs from a stationary observer. The frhnt 6fi prked+(6ab*97emjh (equency heard by the obseh9 tkrp67i *((ed anm6b+efhjrver is

参考答案:    
标记此题
35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a jet plane were to double its MAC m p 3do0yq074z;dh;6qxq2tsukp9h k kH-speed, its half-angle will decrease by a facts; pqo;60mhudk9 d02t7xqq3y 4zh kkp or of:

参考答案:    
标记此题
36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The speed of an ultrasonic sound of frequency 45 kHz in air is 352 m/s. v n2rt,zw5.a+6sxunt What is the airr,5u+x6 tw 2v natn.zs temperature?

参考答案:    
标记此题
37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the ratio of the speed of soundw* 5y+bgb h np1us8bh; in air at $0 \; ^{\circ}C$ to the speed at $100 \; ^{\circ}C$?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  On a day when the speed of sound in air is 340 m/s, a bat emits a shriek whojd h.yfj7wtv) 3m+7ca +cju/dse echo reaches it 0.02+wvy .7addc)3mtcjhf7j/ju + 50 s later. How far away was the object that reflected back the sound?

参考答案:    
标记此题
39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You shout at a cliff, and hear the echo in 4.00 s. The tempera8nxk 6hk p +riezx8pvxr1v+,,,ylq1jture is $0 \; ^{\circ}C$. How far away is the cliff?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If you hear thunder 5.0 s after seeing a flash of lightning, the c jq3k *v27o 2z/.jpyqyqi2mp distance to the lightning strike is a./q*22mjcppj3qyz2ok 7 vq y ibout

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An echo is heard 2.0 s from a cliff on a daym u/*+1 powlep the temperature is $15 \; ^{\circ}C$. Approximately how far is the cliff from the observer?

参考答案:    
标记此题
42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  On a $30 \; ^{\circ}C$ day, there is an explosion. The sound is heard 3.4 s after seeing the flash. How far away was the explosion?

参考答案:    
标记此题
43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You drop a stone into a deep well and hear the splash wds9skpbb*pbc c- :1. 2.5 s later. How deep is the well? (Ignore air resistance, and assume th*bppcs.k9w -bsd:1b ce velocity of sound is 340 m/s.)

参考答案:    
标记此题
44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The wavelength in air of a sound wave of frequencnpp tj-p +gx.)y 500 Hz is

参考答案:    
标记此题
45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Sound traveling in a* 0yo a p38 si en8sasx39zx2k/ho(jgxir at $23 \; ^{\circ}C$ enters a cold front where the air temperature is $2 \; ^{\circ}C$. If the sound frequency is 1500 Hz, determine the wavelength in the warmer air and in the colder air.

参考答案:    
标记此题
46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the intensity level o7c jvkbd5 54nwt azf;sc;k-6k f a sound with intensity $10^{-3} \; W/m^{2}$?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the intensity of v p*scsp:s9/ za 70-dB sound?

参考答案:    
标记此题
48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the ratio of the intensitt ;jag)zod;el l6bk :( yfh+k,f(xps3ies of two sounds with intensity levels of 70 dB and 40 y;(olk zsh: fjpb,;keldafx6t3+)g( dB?

参考答案:    
标记此题
49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The intensity level by 15 enginesq/0efaaa i1z5yudzlu)l p d ),4w4*qx in a garage is 100 dB. What is the intensity level geni 04u/,z4dy5qq)a lxwfdepazl* ua )1erated by one engine?

参考答案:    
标记此题
50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The intensity at a distance of 6.0 m from a soh1i1 q5 rdt kh/qi6a1ycw.4wh urce that is radiating equally in all dira5 k16hh1w d.qqwry/i4 h1itcections is
$6.0 \times 10^{-10} \; W/m^{2}$. What is the power emitted by the source?

参考答案:    
标记此题
51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The intensity at a distance of 6.0 m from a source that is radiating equall9,il k/ss+ad* )1 nxxfpl yj0jy in a,ldps j/i9xysx* j)k 0anl1+fll directions is
$6.0 \times 10^{-10} \; W/m^{2}$. What is the intensity level in dB?

参考答案:    
标记此题
52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A barking dog delivers about 1 mW/,b- -l 6 doaw7mug:npze2dlx of power, which is assumed to be uniformly distributed in all directions. What is the intensity level 2 -z, uoawdxbe:n-d6g/ 7pmllat a distance 5.00 m from the dog?

参考答案:    
标记此题
53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The intensity level is 65 dB at a distance:c kntj84r5j2o aibi9 5.00 m from a barking dog. What would be the intensity level if two identical dogs very c nt82ia954jkb oj:riclose to each other are barking?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  At a distance of 15 m from a sound source the intensity level i8n67g +* mc7v b9wiqvwf)c.d8sm bsers 60 dB. What is the intensity level (in dB) at a point 2.0 m from the source? Assume that th9r67 m nw eb7vc8gciqd s)w*v.8+fsbm e source radiates equally in all directions.

参考答案:    
标记此题
55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The sound intensity level 5.0 m from a point source is 95 dB. At what disht s29,j-r n:dow4arktance will it be 75 d 42 9:-otshaw,jkrrndB?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The third harmonic of a complex tone has a frequen,ydqz ghu lit8 df*k;8 98zoi7cy of 1200 Hz. What is the freque ,idyutldg98o8hz*i8kz ;f7 qncy of the fourth harmonic?

参考答案:    
标记此题
57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The frequency of the third harmonic of an open pi+ vjyeo4lo* /npe is 900 Hz. What is the length of vnj+oey*l o/4the pipe?

参考答案:    
标记此题
58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The lowest tone to resonate in an open pipe of length L is 400 Hz. What (2v4h83 vquwctas qf8z xvg6 -is the frequency of the lowest tone that will resonate in an opcgx48 v86sqh3w v f2 aq(zvu-ten pipe of length 2L?

参考答案:    
标记此题
59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An organ pipe open at both ends has a length of 0.80 cp1ec hik,6btq, 5c 01fycr5fm. If the velocity of sound in air is 340 m/s, what is the frequency of thet,5c,fkb 1q01c ch6erpy 5icf second harmonic?

参考答案:    
标记此题
60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 3.00-m long pipe is in a room wheuaj1mv0 l y,mq.,ce*xn+ u x2ore the temperature is $20 \; ^{\circ}C$. What is the fundamental
frequency if the pipe is open at both ends?

参考答案:    
标记此题
61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The fundamental frequency in a pipe closed at one end *jlqx1* 9sdiv6,b7gsn mstp:. ckqx0is 330 Hz. What is the frequnm7:0*1s gsjx ,ipd*qvl ktb. 9c6q sxency of the third harmonic?

参考答案:    
标记此题
62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the length of the shortest p9 p z-zoz-y+xu xio.k59qy8tg ipe closed on one end that will have a fundamental frequency otgz5u-xkoz.89yq p-+yox9z i f 60 Hz on a day when the velocity of sound is 340 m/s?

参考答案:    
标记此题
63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 3.00-m long pipe is in a room where the tyy5;obzv5)5xk, cbg6 vcy pu1emperature is $20 \; ^{\circ}C$. What is the fundamental frequency if the pipe is closed at one end?

参考答案:    
标记此题
64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 3.00-m long pipe is in b z;zi+ c/lcl8a room where the temperature is $20 \; ^{\circ}C$. What is the frequency of the second harmonic if the pipe is closed at one end?

参考答案:    
标记此题
65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A closed organ pipe of length 0.75 m is played when the speed of sound in aax09 j4izttnhu97 se6ir is 340 m/s. What is the fundamental frequens7n 9jhixuez tt6 a409cy?

参考答案:    
标记此题
66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider two pipes of the same length: one is open and the other is eyuvt+ k)6 9ficlosed on one end. If the fundamentalt k+uv9 e6yf)i frequency of the open pipe is 300 Hz, what is the fundamental frequency of the closed pipe?

参考答案:    
标记此题
67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two adjacent sources each emimzz0fik.3:e m/b+k5yg)n zw r t a frequency of 800 Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 3ni z.kk 5ezz/wybr0 +f:mmg) have to be moved so an observer in front of the sources would hear no sound?

参考答案:    
标记此题
68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two speakers are placed side by side and driven by the same frequency of 500 Hz m z*/r5iny91qf/rjpu . If the distance from a person to one speaker is 5.00 m and trrn/p59 1yiqf j */zumhe person detects little or no sound, which of the following is a possible the distance from the person to the other speaker? (The sound speed is 340 m/s.)

参考答案:    
标记此题
69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two tunes have frequtu ;h 9cj2ps*8 l:;asgkq2q olencies of 440 Hz and 444 Hz. What is the beat frequency?

参考答案:    
标记此题
70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A music tuner uses a 550-Hz tuning fork toio) 6j.ppeky5 isk kpr/2y20 d tune the frequency of a musical instrument. If the tuner hears a beat frequency of 2 Hz, what is kdpi p/.06kosi2p25)yreykj the frequency of the instrument?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The wavelengths of the sounds produ lsu w-)9u3ksjced by two horns are 6 m and 7 m respectively. What beat frequency is heard whel-)ujs s39 kwun the horns are sounded on a day when the velocity of sound is 340 m/s?

参考答案:    
标记此题
72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The corresponding violin strings on two violins in arfbk4z *p 8w(bn orchestra are found to produce a beat frpr zb(w*fk4b8equency of 2 Hz when a frequency of 660 Hz is played. What percentage change in the tension of one of the strings would bring them to the same frequency?

参考答案:    
标记此题
73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An observer approaches a stationary 1000-t5; 33wv ;p 2ljb mozw72esipqHz sound source at twice the speed of sound. The o2; o2e37 vpwztbq splw5im 3;jbserver hears a frequency of

参考答案:    
标记此题
74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A sound source (normal frl-i )filk+,a3,z7k k safzp4 nh a+4dpequency of 1000 Hz) approaches a stationary observer at pkal ,3dlip-k4,fahnz ) ia7k+4+sfz one-half the speed of sound. The observer hears a frequency of

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A sound has a frequenc -mmsevu/mu+ (y of 1000 Hz. If a listener moves with a speed of 30 m/s away from the source, what is the frequency heard by the observer? (The sound sme(/u smm- vu+peed is 340 m/s.)

参考答案:    
标记此题
76#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A police car has an 800-Hz siren. It is traveling at 35 m/s on a day whent4;t . vvzeid1 the speed of sound through air is 340 m/v iz.tv1edt ;4s. The car approaches and passes an observer who is standing along the roadside. What change of frequency does the observer hear?

参考答案:    
标记此题
77#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the frequency heard buy4zur/1 m;y dy a stationary observer when a train approaches with a speed of 30 m/s. The frequency of the train horn is 600 Hz and ymu;dy4 uz/r1 the speed of sound is 340 m/s.

参考答案:    
标记此题
78#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A train is traveling toward you at 120 km/ z t212pvm0axyh. The train blows its 400-Hz whistle. Take the speed of a0vp2z2y1xt m sound to be 340 m/s. What frequency do you hear?

参考答案:    
标记此题
79#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You are moving at 120 km/h toward a stationary train. The train blocmxz *)kdf*8dxbm*.+sn eq97of iz8f ws its 400-Hz whistle. Take the spdkm7sq. md9*f bci*znfxf*e8z 8o+x)eed of sound to be 340 m/s. What frequency do you hear?

参考答案:    
标记此题
80#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A train is traveling away from you at 120 km/t8x d0-5tmn m3c r qqw:f5xh3bh. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What f 3q-n8mx:h5mx0 wtd3tr5cb qfrequency do you hear?

参考答案:    
标记此题
81#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A train is traveling aw *ag1/rofx .sbl1v ys+ay from you at 120 km/h. It blows its whistle, and you hear a tone of 400 Hz. Take the speed of sound to v 1y 1x+abfsrs/g.l*o be 340 m/s. What is the actual frequency of the whistle?

参考答案:    
标记此题
82#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The frequency of a train horn ; darxymo:k:01y, t sukka5)a is 500 Hz. Assume the speed of sound in air is 340 m/s.o x1m0k:, ds5uart;y kya):ak What is the frequency heard by an observer if the observer is moving away from the train with a speed of 30.0 m/s?

参考答案:    
标记此题
83#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The frequency of a train horn is 500 Hz. Assume th 9)/-s hhh . ndhck/woracm)the-9 +qde speed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer idmh9 /-o-cthn k/c h dh9qa+.sh))rwe s approaching the train with a speed of 30.0 m/s?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
84#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Sonar is used to determine the speed of an object. A 40-kHz signam oxp3a-0)8f cfu2jbal is sent out, and a 42-kHz signal is returned. Assume the speed of sound is 345 m/3 ux0fma-8op cf)ja2bs. How fast is the object moving?

参考答案:    
标记此题
85#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The half angle of the conical shock vt7e8*cg* i5939qh7hzg c ufmyzh/kt wave produced by a supersonic aircraft is $60^{\circ}$. What is the Mach number of the aircraft?

参考答案:    
标记此题
86#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A jet flies at a speed ojtg w3: kt6)d5)own+f) ha natf Mach 1.4. What is the half-angle of the conical shock wavew6not:wk+jgdath3 n) tf 5a)) formed?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
87#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The Concord airplane flies from the United States to Europe wm ; 0souai1i6xme9uv5ith a Mach number of 1.05 where the air temperature v;u aum6eim1 o9xi05s is $5.0 \; ^{\circ}C$. What is the speed of the plane?

参考答案:    
  • :
    •
    总分:87分 及格:52.2分 时间:不限时
    未答题: 已答题:0 答错题:
    当前第 题，此次习题练习共有 87 道题
    本系统支持习题练习，作业与考试三大模式，作业考试自动评分，成绩排序一键导出，可设定动态变量同一试卷千人千题
    如果您对本系统感兴趣，想加入我们或者想进行任何形式的合作，请加微信 skysky1258

    试卷内容到此结束!   © 2024 题库网 (https://tiku.one)版权所有

    浏览记录|使用帮助|手机版|切到手机版|题库网 (https://tiku.one)

    GMT+8, 2024-11-22 00:18 , Processed in 0.457325 second(s), 195 queries , Redis On.