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 faldktb6,xnv1x.mr *lm 9l;2 dj 6+juk zise 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 thro7*4 qlkyt-qjqtbo 34jugh

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 su* /v+a d t2ijx6,moczteel 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, wn4fiz . uj;2suhat happens to the velocity of sound? (Assuns . ;iz42ujfume 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 soubb( 2*in5ovuvnd through ain*io(uv5 b2 vbr 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 jl+k*2 (mvx)r+xxos qs 9w-euof a 200 Hz sound in 2k-+)x *rxeql9mw(vus+oxjs air 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 freznkf-t0o :5g u;k )kqiquencies 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 frequency less tv q5tk1 ag)-gphan 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 waves uniformly 8yt))ip+v2 i hwh3eehxy 3z4hin all directions. If you move to a point twice as far away from the source, the frequency of the sounv h3z+ehi 84 exphy ty)i)hw32d will be

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
10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For spherically divergings 2 +04c/xjcrrp mzh:* (qpeqw waves, intensity 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 di: y.mzzm:u4e8a3v uwu stance d from the source is I. What is the intensity at aazu.yvzmum 3uwe84: : 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 sksa r72*n+ balg51sfxource that is radiating equally in all directions. What happens to the intengnsf*s+x5rakl 2a 7b1sity of the sound? It reduces to

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
13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You double your distance from a so l l ;-+d*-*qzjgq,ruwynd6bn und source that is radiating equally in all directions. What happens to the intens;zlng+buq6rqn-d dy* lw j-*,ity level 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 abd0l bsu(2uw5b xtyiaqy 98:4 s a sound becomes louder?

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 emitting a pure tone:dw7v *c2 9xgamyg/a a. What characteristic of th y:g2md7xvacg9w/aa* e sound 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 musical notu3 gdlyi t5 5 ,sr)cqmal(((*tljcf f:e?

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
17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines the "pitch" of a music4 lgg ;69skx-ef0 awsek.g6dw8zvxp,al note?

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 into waterzjd1 ty8g (h* lh6ua-d

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 displaceme+duq x 9+nh v/b8*1r psumbbui4g6df 5nt waves are

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 -91qjt2 vqbm ma guitar string and the sound wave generated by the guitar as a result of this vibration. What do these two waves have in c-9q 2qj bmt1vmommon?

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 whi :5lr /-q0gp q3 hnvbdatjks,+ch is open at both ends, there

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 t eeppwf;v d30pqh3 ,t8hree lowest tones produced by e8w3 p pq3fet,;p vdh0this 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 an open pizm mh6xy1nzy7z,v mkf /l)x9*pe of length L is 200 Hz. Which one of the followzk xxzm/nmv )l,z97 *m1fyyh6ing 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. Which s,zykx: l/mprnpyqi 8v**d1.q + vmz9ttatement is c*kdt9pm.q :*1r,8p qy+v/lmi nzyxvzorrect?

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 ol cej mm10m6/ul4zb; zne 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 wavelen;zn q5cz*vgg,b6 zno)gths of the three lowest gn*, 5cz) vgbno6q;zz tones produced 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 ijul4o4xnhx jp6y,pm85 n95 uds 200 Hz. Which of the following freqj5ux 546u,nj4yn hdoxm p9l8p uencies will not resonate in that 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 resonating at its fundamental lks2zdt rg:o59rn j 82frequency. Which sta98 oj rt5rzgd2:nk sl2tement 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. Each speakev b)fe(9ubb4z ;cb0q3i g 9ev3cnqd -jr produces a tone with a frequency of 200 Hz on a day when the speed of sound is vuebcb90gqcvn (fzd3e i;b)j94- qb3 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:    
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
30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In order to produce beats, the twp.kub4 t8mri(n1qp 6 to sound waves 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 frequencyg:uqldt7lc5(g38r kelbo 95) ng2 ikp is heard. What happen(5g)978lg2lq dncbo:ue lrtgi5k3kps to the beat frequency 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 explaads;02uc.zf d ;nr )njins

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. The frequency hef7o1if+tet 3x2 8t lebard by the obs+72 otx13tf fl ibtee8erver 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 frequency heard by /dm7wa+(ks .db8z j dkthe obserdmkj/ +.da78(kzdswbver 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 MA,wxd u owg*-f9CH-speed, its half-angle will decrease by a fact ,- gdu*wf9woxor 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 ultrasokx(jt8 uy2zb)5g.u v old f)y/nic sound of frequency 45 kHz in air is 352 m/s. What is the air temper/vy)2k5fbyu.txgl z8(j o )udature?

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 speej ,1;jiznnv+vsyef;ru;.*hl9x v s. g/oev 6 od of sound 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 abtnd)kg394z zx z y*t1 )xidz5+b,gjin air is 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s later. How far awjt x)zg9kzn bzg, z1 ad tbd*3+yx54)iay 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 fsm dee8q wmeyxlut4 u72*,:1s. 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 s after seeing a fz tk nuxx8p+td** tt(.lash of lightning, the distance to the l t(p+8nutx .dt*kt*zxightning strike 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 dayul2rp h uk+e:+suyu*0 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:    
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 well and hear the splash 2.5 s later. How deez6ll m/-b ie s q/,d)vk 95easu8k1wq;ijfwi)p is the well? (Ignore air resista 68iiuel)dvw5q1l ,fzws-;/k )a9jbks/mie qnce, and assume the velocity of 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
44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The wavelength in air of a sound waveq/d,;ydvn 9 rk 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 air atk esm(+(pj.td h )pl)q $23 \; ^{\circ}C$ 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 ofg5o7nz )q rdq7 lnr:+v a sound with intensity $10^{-3} \; W/m^{2}$?

参考答案:    
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-d cjw02gkfc,46vfuf h4 )qk9k4nk at )cB 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 iz*f , qn5+h zjpya)7amntensities of two sounds with intensity levels of 70 dB z7*a hya m ),n+fjqzp5and 40 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 engines in (sif) skp60 imf5k2r wa garage is 100 dB. What is the intensity level gener(wip0i25kr )s 6kmff sated 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 of 6.0 m from a source that is radiating equally in .g(hc m;bxmn( all directionc(mhxbmg(;. n s 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 6.04rvu txpm,-uef n;6by26:val m from a source that is radiating equally in aa4p:y2n mfbt6vxu 6vr; -u ,elll 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 of power, which is assumed to b2 d +vw:pt5lcwe uniformly distribu5pw2w :+ dtclvted in all directions. 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 atb: +)a+djkp) ee wnlvt-ii:8 f a distance 5.00 m from a barking dog. What would :w)+ii:8 k- nepfvj+ b)eatldbe the intensity level if two identical dogs very close to each other are barking?

参考答案:    
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. What reig3 1n5lz t+is the intensity level (in dB) at a point 2.0 m from the source? Assume that the source radiates equally 1giez+3lt5 rn in all directions.

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
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 wzho., qsco96y8 osw4 dB. At what distance will it be 75 d. qsowsc8ohw9 , o6z4yB?

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 frequency g-n4z 8 5nqx* rbp9apfof 1200 Hz. What is the frz9n x4g n5fpb8-rqa* pequency of the fourth harmonic?

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
57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The frequency of the third har , +hny,08u7rbr5: f mvxrxlgymonic of an open pipe is 900 Hz. What is the length of the pi+ 5r,n,f7 ug brl:y hry08vmxxpe?

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. Wha uwn8 dy.ay)u* ms+v+)gbuo0st is the frequency sd+ ng+ uu wusy8.v)bmoy)0* aof the lowest tone that will resonate in an open 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 ss d6k q2:iznp qwnn *4wn.8.hhas a length of 0.80 m. If the velocity of sound in air is 340 m/s, what is the frequency of the second ha . hi. nw8pnn k*ds:wqzq462snrmonic?

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 where the tempmya *4 qu*hyejom6+ gy ;b9*wserature 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 .-bc: hql cl:ypipe closed at one end is 330 Hz. What is the fre.lh :cq lby:c-quency 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 pipe closed on one end that will hanhdhc9/juuj/l;m8lldc 8 b yf,, )gv7ve a fundamental frequency of 60 Hz on a day when the velocity of /d,j/7,ulvu9lmf;8lyb n8hg )jhdc csound 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 dlw h205f gzk/i,fe.2 r)dobz -:uw+xgrvuf- where the temperature 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 a room w: lkhy:f,ao 1khere 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 2t d15)6 td 4akisegnsof length 0.75 m is played when the speed of sound in air is 340tseid6kd 4ns 1gt25)a m/s. What is the fundamental 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 the same leiw)z0) 0z* 0ec yjftmwngth: 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 mw0zi0) 0c z)*ytfjweof 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 emit a fre* tg(e wu5k9wvquency of 800 Hz in air where the velocity of sound is 340 m/s. How mue5vwtu*9w (k gch farther back would source 1 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 sideey+ 5n1 q:wnz1 ; o4cochwpq5a and driven by the same frequency of 500 Hz. If the distance from a person to one 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 spee :wy;qe4c51 c5nhaoo1pnz+ qw d 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 anaft(* j o4 9exfbmt9/c8.fo nqd 444 Hz. What is the beat 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
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 tune the frequency (hk;kw83 1b8kqv nzqj of a musical instrument. If the tuner hears a beat frequencyj1 q3k;qk vkz8bw 8(nh of 2 Hz, what is the frequency of the instrument?

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 prod qd7bb*je1scz+ryi6n +pa4 3a y tqg5.uced by two horns are 6 m and 7 m respectively. What beat frequency is heard when the horns are sounded on a4 t.67csapignbz1*y5b dq+y re +qaj3 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 orchestczqsb62wu-v okx6m rm0 -5dx 1f25mna ra are found to produce a beat frequency of 2 Hz when a frequency of 660 Hz is played6 uo2mmx5 d625rn1k z--x0msvq fcwab . 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 1000-5,i7 znvw/x)fex o)qjde3 m+ qHz sound source at twice the speed of sound. The observer hears a frequefi)z5 7o+3qxxvjqnm ,ede/ w)ncy 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 frequency of 1000 Hz) approaches a station1om qju88 :7tmq/va :)g jgsmzary observer at one-half the speed of sound. The t vg:q:88mmg7o asqjz 1m)/juobserver hears a frequency of

参考答案:    
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 frequency of 1000 Hz. If a listene+f(tb;cb u q3er moves with a speed of 30 m/s away from the s e(cbt;+q f3buource, what is the frequency heard by the observer? (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 a day when the u. 1e(ou( gifatv2 o8lspeed of sound through air is 340 m/s. The car approaches and passes an obser8t 1o igl2fu u.a(vo(ever 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 by a stationary observer when a train approap(pttdmb) kn/xw d;m+w *sz*1ches with a speed of 30 m/s. The frequency of the train horn is 600 Hz awtkx s);bd/mtd mp* wn+p*z 1(nd the speed of 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
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 blows4.zagoth s)5(: ng7jm.ck7dj p b/aa e its 400-Hz whistle. Take the speed of sound t (hzo g7gd.amj7jatp n4k/a5e:.s)bco 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 stationarv-mqc4 j03og ay train. The train blows its 400-Hz whistle. 3jc4o-mg0aqv Take the speed 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/h. The train blows itsgqg 2q;8nm.e,qgld a otp,c/(rlr 7c 0cz 3l6e 400-Hz whistle. Take the speed of sound to be (alrt2o/,qm 8clqe3 cpg7cz;nge0 ,6.grqdl 340 m/s. What 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 you at 120 km/h. It blows its whistle,,es(cka pl)z8 and you hear a tone of 400 Hz. Take the splc(ep8s) ,az keed of sound to 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 ho0t(lge g sgoz (n8// op9hf2h7w)k homrn is 500 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer if the obs7h2e/( 0ol z/8wmog o9h )kt(pghnfs gerver is moving away from 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
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 H g q(*my38po7vjfjj f3z. Assume the speed of sound in air is 340 m/s. What is the freqq3 jo p vm(jy87g3f*jfuency 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 determine the speed of an object. A 40-kHz signal is senp nwy3 79(+ qokjjz0nit out, and a 42-kHz si0pwjyk3( nizj9 +onq7gnal is returned. Assume the speed of sound is 345 m/s. How fast is the object moving?

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
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 p01or1 v uuo1 .cin5hixroduced 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 is the half-anglemks0vrb6 f4f* xt*o+dnm:o 8q)odz)r of the conical shock wavodm:+bk8 sdm0rf6*4)forxq ov)* ztne formed?

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 fgd+wq t9* x)77bo cwmnrom the United States to Europe with a Mach number of 1.05 where the air temperatuw 7n wm cd)g9bxt7+qo*re is $5.0 \; ^{\circ}C$. What is the speed of the plane?

参考答案:    
  • 答题人:
    •
    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, 2024-7-9 06:26 , Processed in 0.459998 second(s), 195 queries , Redis On.