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 iseisqoex;u,* 11som)s,5o o 9qbt;otl a false statement?

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
2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In general, sound is conducted fastest zf sr*oi9.d s7through

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 of sound in a steel romj:q txq8 ;) 0h;sppyvd?

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 velocity of tjb4 sm +k,vb,sound? kbj+,t,v4m b s (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 sound, the velocity of a 200 Hz adnp 2y(xwgec+ql 380sound through aiy8xd 3 0legwac pnq(2+r 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 wavelength of a 400 Hz sound, the wavelength ny8 ) ; 3 kova,l,y2(ibfq9tf oxbbji+of a 200 Hz sound in k, oliyni 3 o+928 ;tvbbqy(, xf)bfajair 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 frequencies greater than 20,000 Hz are cabrptw7 7m c i2p-zszrlj/73+alled

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 frequfry7nlfbbc 637j+ mb5ency less than 20 Hz are called

参考答案:    
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 waves2sbfxsb 3 bj/; uniformly in all directions. If you move to a point twice as far away from the source, the frequency of t 2s3f;b b/jbsxhe 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 *hpe:yi,6o( l+ ,od c7gpubdxj de8)zis 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. Wha b+k aeyiw.m:3t1ff7ft is the intensity at a distance 2d from t f. awmye1 tf7+fb3ik:he 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 radiating equally in alz,i o50q)macll directi0mqz,a5i o c)lons. What happens to the intensity of the sound? 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 from a sound source thazzkn br;8 ty,*t is radiating equally in all directions. What happens to the intensity levenrzy , 8tkzb;*l 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 becomes 4pz/e1*8xrw/rpp0g6 e agczrlouder?

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
15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You move slowly toward a speaker emittinc wl.uom.3w, obiu(mu49j-.ial lor 8g a pure tone. What characteristic of the swauu,r. 4wj mlo-8lbmu(3ici.9olo . ound increases?

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" of a,30x cb6znmrj 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 gz3a hpr;5in 8;yssn7note?

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
18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When sound passes from air into p4za )vi 7tv6aa,(lzz.u* wgw water

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
19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Pressure and displacement waves arev,z sm n;;4q1vg zj+ cx+w7p;xmea*gw

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 guitar string and the sound wave generated by t r1sxg;o ba2eb:b g//qhe guitar as a result of tqe;a1rbg:b/ / bsgo2 xhis 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 botymdkp/) o.6r9hrq(irh ends, there

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
22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider an open pipe of len mv lb92y am)om6(u,g1v nr;gagth L. What are the wavelengths of the three lowest tones p m1(n yuov g,a)la9mmbv;gr62roduced by this pipe?

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 anu5lsit 9i;f)es5 z)hn open pipe of length L is 200 Hz. Which one of the following frequenciesitsh)snui e) l;9f55z will not resonate in the same pipe?

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
24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An open pipe of length L is 3q j:u6i;i9usfrd4k21pio i fresonating at its fundamental frequency. Which statement is corq :kf4ir9su3fi;iuo 2djpi 6 1rect?

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 whicwnpzc .i02xl6 ly0; wdh is open at one end and closed at the other, there

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 length L. What are the wavelengths of the threjuum*9hab tm45 * h osu2mk9s+e lowest tones *t m+2um5 u*9so4kjh h us9bmaproduced 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 closed pipe of length L is 200 Hz. Which of t1hf :t+zk ceg7 pfq,4the following frequencies will not resonate in that,7+tz 4gfhtc: fe pq1k pipe?

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
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 resz4k36 lcppda6z/ )yc donating at its fundamental frequency. W 3a6yz6c)p zdlpdck4 /hich statement 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 souhwi:vpl4 c-:q9 fj8.c 1;vs aisu)ktz:zg s*orce. Each speaker produces a tone with a frequency of 200 Hz on a day when the speed of sound)f;i1tq*:jgwsvpl 4v z.9uso:8c:akc-z si h 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 wa 9+s*z:olzd-t3glek of72sk vves should have

参考答案:    
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 frequenu upqw(:). qy3at0 eza y)xyyre2mu38cy is heard. What happens to the beat frequency if the frequency of one ofq3 e.ywqy8axru 3et u2(p y a:z0y)um) 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 explain:60olcaybt/ k aac21 ss

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 stationary observer.dazjm1b/mq6 f,u m8/m The frequency heard by the obsqm d/8j61, ufmmzba/merver is

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 freque9fd; gj-ivxfeop8od9 .j8kj 8ncy heard by the observer is .i-f9jj ojkexfodd8 8; 9vp8g

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 MACH-spyg -+h3 wyxzt5eed, its half-angle will decrease by a fyyzwx 3+gh5t- actor 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.9 l9pki7 ow+rs What is 7+r9w pol9ksi the air 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 souns8,gf 6bsu(q h( ,mrhhd in air at $0 \; ^{\circ}C$ to the speed at $100 \; ^{\circ}C$?

参考答案:    
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 sir4 6 smpy:s.xhriek whose echo reaches it 0.0250 s later. How far away was the object that reflected si p:4m xry6s.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 cmnz x q9l92nskak)24:gwly7the echo in 4.00 s. The temperature is $0 \; ^{\circ}C$. How far away is the cliff?

参考答案:    
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 sa4g5t4;zadvki u*mie 3fsevsx ( 0u5, after seeing a flash of lightning, the distance to the lightning strikvviaguks0xt,* 5f4s eu ei4z( 5m3 ;ade is about

参考答案:    
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 day th;1f, *kphf s4.a,zppbw azqqt - )huu(e 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:    
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
43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You drop a stone into a deep wew y3vjs3(m*zm ll and hear the splash 2.5 s later. How deep is the well? (Ignore air resistance, and 3j3(*mywmz vsassume the 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 airn +2/a( biavlu of a sound wave of frequency 500 Hz is

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
45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Sound traveling in aiw2.4guopz2*nr bf 5e gr 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 of 5tb,/apsikw 2 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 a 70-dB ac db)y fbo*04xf7bn5sound?

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 intensities of two soundsnv jv9 -c*hywyxl76 c) with intensity levels of 70 dB and 4x *cw l7jyycn6)v9vh- 0 dB?

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
49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The intensity level by 15 engines in a garage is 100 dB. What is the inte 2 ncyz)*hx z5jdqwk/4nsity level gzykn/*xh)54 c2 zdq wjenerated by one engine?

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
50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The intensity at a distance oz9 aq3ulu, h* re/jd q5mk3ty5f 6.0 m from a source that is radiating equally in all directijdzy, m*ah5 3tre3q kl9uuq5/ ons 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 radiatin: s(hl14wzluug equally in all directions il hu1( uwzl:4ss
$6.0 \times 10^{-10} \; W/m^{2}$. 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 of power, which is ass3lu -bwevw4h.0 q.752hlbfdm bj* miiumed to be uniformly distributed in all direvi*w2q f.3m bih5d-0lwuh lmbb4j7. ections. What is the intensity level at 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 ap4fa tt .2umrkq4mt3* distance 5.00 m from a barking dog. What would be the intensity level if two identical dogs very close to each othtmm4q4ku* r f3p.tta 2er 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 is 60 dB. basn4yun, v89gphamg8 ; n6/e What is the intensity level (in dB) at a point 2.0 m from the source? Assume that the source 8,y4e6hm nb8g/ gsnaa ; u9nvpradiates 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. i688g7vv+ /*jj jjwp e6byih a8a8zzb At what distance will86 8j vh6iij zy7wagp*jazb j 8vb8e+/ it be 75 dB?

参考答案:    
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 frequenckft.*db hkq39;p py,hy of 1200 Hz. What is the frequency,.tk*f93dph hqp; bky 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 ha +az) e sro.yzfdg0 z2)l(cg8crmonic of an open pipe is 900 Hz. What is the lengtrgye8c sz0do)2c z .az+( g)lfh of the 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 i y:1buf;s bp 9ez,or0zs the frequency of the lowest tone that will resonate in an open pipe o of;bz0pb1 yue s9r,z:f 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 le) hxh rhlrt(8.l o)88a ptmwg0ngth of 0.80 m. If the velocity of sound 8h8r t8op.m )lhr lta)wh0( gxin air is 340 m/s, what is the frequency of the 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 wherem ,jc55zh3 hmr/5g cgp 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 im6 vgi *5n,.) zp9eyructuy 4zn a pipe closed at one end is 330 Hz. What is the frequency of*y6ny95 4.gretp i)z uvczmu, 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 shortr7 wt*gdze62 hm *ip.nest pipe closed on one end that will have a fundamental frequency of 60 Hz on a day when the velocity ofmitrw6*g7. e* zndh2p sound is 340 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
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 where4v)xpwr mp)u; the temperature is $20 \; ^{\circ}C$. What is the fundamental frequency if the pipe is closed at one end?

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
64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 3.00-m long pipe is inra; fu uz kxvj12:9k2u a 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 spehf kcw6x6 1 ) svpjh9t,c*i:aded of sound in air is 340 m/s. What is the fuh* cvw6 )p:d ,csf6a1kx jti9hndamental frequency?

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 zu3cv7 q8+wpmx6.b tethe same length: one is open and the other is closed on one end. If the fundamental frequency of the open pipe is 300 Hz, what is the fundamental frequency of 7q+ 63cbmuz. ptvwxe8the 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 emit a frm*ijzg2x - z khd0 /ex1xqg*x(equency of 800 Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved so an observer xhi( z0*j2x*dgxkmex/- 1 gqzin front of the sources would hear no sound?

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
68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two speakers are placed sid:xvy,/vud9y bp/nn v8mwc: r+e by side and driven by the same frequency of 500 Hz. If the distance from a person to 9xuvdn/:p :cv+nr,wyy8 b/ mvone speaker is 5.00 m and the 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 frequencies of 440 Hz and 44d/nq e-q) jhbrj35i kxr4b+(d 4 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 to tune5m8dqnh cemb58u2 )7 j3xqlqf the frequency of a musical instrument. If the tuner hears a beat frequency of 2 Hz, what is the frequency of the inlfj5 eu3m bqmqhqxn85c28 7d) strument?

参考答案:    
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 produced by two horns are 6 m and -rq3i h qw;s0i ncfo7oo .x2r17 m respectively. What beatc2n qhf-;or7r x 0siqwooi. 31 frequency is heard when 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 an orchhz s z87*(z 8*(pg/2pg2dlz j4u fjo sm8ecntyestra are found to prod8lf 7s(u 4zgp*o z8zs 8jc2zt /(hjp gnmd2y*euce a beat frequency 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:    
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
73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An observer approaches a stationmi6t,v(dy5y-rh 02x ma: uq/evwg zz) ary 1000-Hz sound source at twice the speed of sound. The obsehq/zzx0 ,2vvwim):-( 6u gera5ym tdyrver 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 freque9bu g7 5*4dk4sqkft cincy of 1000 Hz) approaches a stationary observer at one-half the stbf95siq7kdukg c4* 4peed 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 freque gxtv tqzv,go;(m9- /oncy 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 o-g /oqx otmg9t(, vzv;bserver? (The sound speed 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 uh06 25czmyas a day when the speed of sound through air is 340 m/s. The car approaches and passes an observer who is standing along the roadside. What change of frequency does the obsc26h uazs05 myerver 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 by a stationary omuntw*u kr3dcm6,bde 163 ae7l(:t eqbserver when a train approaches with a speed of 30 m/s. The frequency of the trdt 66u uk:1eawmb3c e7nqlt,red3*m ( ain horn is 600 Hz and 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/h. The train bty2x +xytqu /gy3*2 awlows its 400-Hz whistle. Take the speexw/3g ttyyxay *2+u2qd of 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 c.gw ns..5c(pey ic7n toward a stationary train. The train blows its 400-Hz whistle. Take the speed of sound to be 3pe.gnic(7cn5 wc s. y.40 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/h. The train bl/ccltf-j v*k bbk(cysa3s533ows its 400-Hz whistle. Take the speed of sound to be 340 m/s. kk -t/(b v afc3s5yjlcc3 *s3bWhat frequency 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 away from yougax 72x7ppz(*-ff5 3m unnv gz at 120 km/h. It blows its whistle, and you hear a tone of 400 Hz. Take the speed of sound to be 340 m/s. What is the actual frequency ofnfg-7uvg5z3xna7 (2x pf* mpz 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 is 500 Hz.bs- )7 qh*dhj8dd 5mvr Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is moving away from the trai8mv-7q *b djr)h dh5sdn 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 :;ltvg rk-pf2 horn is 500 Hz. Assume the speed of sound in air is 340 m/s. What is the frequengr-t2f:pkl ; vcy heard by an observer if the observer is approaching the train with a speed of 30.0 m/s?

参考答案:    
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 determhqccjl,,mur -f 8k 6/h wv0rp7ine the speed of an object. A 40-kHz signal is sent out, and a 42-kHz signal is returned. Assume the speed of sound i8, vh,6fpcq0r m7h /cl-k urwjs 345 m/s. 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 wave pro3zou. 4 ljmx8dduced 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 of Mach 1.4. What iweq3 s2+ ehes0s the half-angle of the conical shock wave formewe he02s3sq+ed?

参考答案:    
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 with a Mach nu,fe )4 nar8wgrmber of 1.05 where the air temperatur )f4arnw8re,g e 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, 2025-4-12 10:17 , Processed in 0.628437 second(s), 195 queries , Redis On.