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 iwc;a n0(gah5pegu 2 c;s a false 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 fastest thro5dgmlji 8igp,k)2 gz .ugh

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 eaw.o((y3fvyx znn*t9qu 2k :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 increask6*blf84(cn n*fcl .c6 v0owgj ebar-es, what happens to the velocity of sound? (Awn*bolla e.b4(kcjf 6rc g-f8n6*v c 0ssume 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 veloci-fox(si m*90/gtpfl rty of a 400 Hz sound, the velocity of a 200 Hz sound through air gplo(*fis0mt rx9f/- 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 o e4 7kziudj)5k7 m)p2jvh glid/uhe xl;w;6 p*f a 400 Hz sound, the wavelength of a 200 Hz sound in27hex k4)w6p);pijuduvlk7 d/jlgim* h5 z;e 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 witxu9hjf5baj pm8/:u) nxa 8jn e/x;. w8)siysoh frequencies 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 freque 2 stdvio-u3.wncy 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 umpg xexm q-+b.xtx *nfk-)3l0niformly in all directions. If you move to a point twice as far away from the sourcbxtx 0 m* .x3m)ge-x+kqpl-nfe, the frequency of the sound 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 diverging wav2w;vdga *h6q, amuv(+bdj g55 d4kseaes, 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 distanco3.mqau x7jqsg m kd)5i)omh)r7+ ab2e d from the source is I. What is the md7ar))j.a uqm q5m 7+ox hksb3o2i)g intensity 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 distanceu ha.e2rxu-*tg/r)nf1obq fx3+,up j from a sound source that is radiating equally in all directions. What happens to the intensity of the soun-e/ pqxx, a13fjo t*gr.2bh+ufuur )nd? 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 that is radiating equally in alwp g8af2c r .v+u,1ipe0zr5i zl direi .ager52w1i 0 f+pvzru,pc8zctions. What happens to the intensity 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 followi/d k-z7x1a/kog qt m9sng increases as a sound becomes 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 toward a speaker emitting a cc8q82lxqd7 gzxn m4; pure tone. What characteristic of the sou2d4zln 87q; xxgm8c qcnd 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 musbgi:-m rvy , u3-uxm,cical 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 "pt p.xl jh33xh9id 1t )hwt;w+pitch" of a musical note?

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 intohj-v/mssvy *s3q 5 o+u 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 wxuz5mh./p01 13e/emz,o y* dft c tpotaves 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 a guitar string and the sound wave gener ucx6xslysv.8,3k8wt ated by the guitar as a result of this vibration. What do these two waves hav t x3ls.8xw,8s 6ukcyve 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 ent;ljlt1/( k7oph* w ucds, 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 offc 8hgo7tu-4d u:yow s9 /(lgo the three lowest ton wy 7d9 :-hs8uloo/4gcgt(uf oes produced 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 an open pipe of length L78q)goraam8 u is 200 Hz. Which one of the following frequencies will not rmr7a8g)8q auoesonate 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 z( zy2p,m6 t2e. yqeipresonating at its fundamental frequency. Which statement iszyzqt(ym. p,ee6i2 2p 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 andi:88g,7q jps5zzsa mn 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 thrgb) hd 2 9/upw0z 7bbg qbdnm*.m-t5ueee lowest tones produced by t 0bqbmzwubmdn7 -*u/dtb5e hg).g92phis 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
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 leng athj/jo:ka dtp*z 4+:th L is 200 Hz. Which of the following frequencies will not resonated4tj za+ht/o::akjp* 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 fud;-ix 1mhah9j ;xu r+;j:o.jn4qbdyqndamental frequency. Whi9qh i1;.;da-y4jqo uxb+n; mdrjxj h:ch 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 sy-- cyz10gu a/cbuap0 peakers driven by the same source. Each speaker prpgac/u y0y1-b- 0 acuzoduces 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 mub 9,tkh yw-2sound 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 nif bb99 lqarzt.v 2*zj3)6ql frequency is heard. What happensl9bi9v3n*j2z.6bfq qrz l ta) 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 expla(up(nwb 8 6iqlins

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 obseaflqv 4+(o3sqf hyf9,m(7kc erver. The frequency heard by the observer 43e9o+7 m l(aqqk yvhs,ffc (fis

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 frequeg vpq.f-q(:a7kyd f*i4 +v a/ucz k-nancy heard by the observe.ny gakv (fa-vk*i4-qc u+:dq/ z7afpr 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 MACH-speed, its half-angl6 cl )dqmlhj, cf oj)ts/7stc94o,n n4e will decrease by a factod/f)nnch4s4c mltj9 o tc,j )o,s6q7lr 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 frequegh t 2/f5av+hmncy 45 kHz in air is 352 m/s. What is the air temperaa+m/gh5h 2 ftvture?

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 6y;g;mig)oo m 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 soun1 fimb s5voo-s:+ rq4ld in air is 340 m/s, a bat emits a shriek whose echo reaches it 0.02s:+5v4lios qb1m rf- o50 s later. How far away was the object that reflected back the 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
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 temperature is gcwc :z0d,3jg bhz2 )f$0 \; ^{\circ}C$. 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 flash of lightn8p bmq(05a+zf eqf(kring, the distance to thek pf(rqe +z85f0aqm(b lightning strike is about

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 day the temperat48 b wta x5,oywj,szl7ure 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 wely4csgz;oje jjmn;f3*j4 gn0t q8c-x )l and hear the splash 2.5 s later. How deep is the j);3 te-jyo0g cjzmxf8qs;4cjn*4 gn well? (Ignore air resistance, 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 wave of freque8a21pjbv.hzul ;3hgn+ce 8 t hncy 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 air kye-)ud5nx4bpk )i4 b 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 a sound with intci,to (1/rb,wf7 lmaqensity $10^{-3} \; W/m^{2}$?

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-dB sou8a yal)3 g( cc8bi4zsha)tq7und?

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 vnj fw w11k(p8the intensities of two sounds with intensity levels of 70 dB and 408 (vjpk1 nw1fw 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 a garage is 100 0ee+2m kbfq v3-xz9vb dB. What is the intensity v-b9k qz 03mxfe2vb+ elevel generated 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 source that isgl8gv.:8 ad xhae+/ ov radiating equally in all directions i +./8xegv8odaa h:vgl s
$6.0 \times 10^{-10} \; W/m^{2}$. What is the power emitted by the source?

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
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 istlhz -jla9f11 radiating equally in alllla- hzfj191 t 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.gz39q0 w8wohss5pwv to be uniformly distributed in all directions. What is the intensity level at 9 s5vwo3wg zq80 whps.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 distancegdai nn u*x213 5.00 m from a barking dog. What would be tha3n1ndui*g x 2e 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 ma2 sr.gxu0j.dB. What is the intensity level (in dB) .asu0 2jxmrg.at a point 2.0 m from the source? Assume that the 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 poin c ;ve*v+nrl/2xmlni.t source is 95 dB. At what distance will it v/.n;en+c xml *vli 2rbe 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 frequebh68rd c.c k/((crkwzncy of 1200 Hz. What is the frequency of the fourth ha b(rkc dc6wc/ r(.8zhkrmonic?

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 thi88u 1amz;mnjxtp7c f. rd harmonic of an open pipe is 900 Hz. What is the length 1zmt88u mj;pfc x.a7n 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 reso/-twqy k:b 6gx n.+ svu5)atvrnate in an open pipe of length L is 400 Hz. What is the frequency of the lowest y tba-tr./uxwg6:n+v)5qsvktone 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 has a length of 0.80 m. If t +ojbcz,u(*;n 7chfprhe velocity of sound in ac; + b7przo(f jcu,h*nir is 340 m/s, what is the frequency of the second 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
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 r6 qfoc h49n.nh+3aqpfvc1qu.oom where the temperature is $20 \; ^{\circ}C$. What is the fundamental
frequency if the pipe is open at both ends?

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
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 is 330 Hz. What is thehp3 ctvpev(oq qka h ,f4*9k:4 frequency of h* ,aqtk3:v4hq(49oekpfpcvthe 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 5(bs4. az2ru zvoppj( on one end that will have a fundamental frequency of 60 Hz on a day when the velocity of sound is 340 osu .zj4z(barv2( pp5 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 ro74u l gja 3mdwbjkza7fy0(o;/om 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 where the uijsonm zko l,m0 dy9881 d;-ctemperature 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 0.7;,c2-dcw qvorulb3d /q5f lvucy,)j65 m is played when the speed of sound in air is 340 m/s. Wha, dfc2lbq; q3 -,wcv6/vdouuy5cl)rjt 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 length: one is open and the other in3fgwmh i *th n)2uv-/4ao 0des closed on one end. If the fundamental frequen ntag3/h2) wv e0ndoim4u-f* hcy 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 emit a frequency of 800 Hz in air where c7 1btzbfeu+ k 2rt0a7the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved so an ob27b0ea+t1bu7ktcf z r server 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 anh-.h +gex/o1flau d6td 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 otl1.6haox/ f+d- hgu teher 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 444 Hz. What is the be3wb6 d5g3 .bk1ukpjyg uuv39 pat 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 54 ( vsen)q*0uct m9ibz gv7,ij50-Hz tuning fork to tune the frequency of a musical instrument. If the tuner hears i0gbnjv9cz 74)qv*,e is( mtua beat frequency of 2 Hz, what is 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 produced by two horns a w :jj9q* (g4fgqbtib/-ykye.re 6 m and 7 m respectively. What beat frequency is heardk . qyj:9j*i4wbtq/ ge- byfg( 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 orchestra are fbtqn p+dbqe f*7er;;; ound to produce a beat frequency of f;nr;qtepeq; d + 7bb*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-Hz sound source at twu (j s;aj rkjq-fi.;::j+vr upice the speed of sound. The observer hears ur: sr;j;q-ai. +v jfj(:jpku 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 frequency o,m -v2fjgo/ r1dain;if 1000 Hz) approaches a stationary observer at one-half the s2 m-1gir ,ifo;v /ndajpeed of sound. The observer 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 10/h90gy h9l6d1l bpr-r qn(qzm00 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 speed is 340 m/sp l9qn6y90 h( / gqrbm1hz-lrd.)

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-Hdll572scdjm hi m) t);z siren. It is traveling at 35 m/s on 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 flcds5t)lm d;)jh7mi 2requency does the observer hear?

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
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 7)s5cd zvqf 5-r+hdppwhen a train approaches with a speed of 30 m z75d-+d qvc)hrp 5fsp/s. The frequency of the train horn is 600 Hz and 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 i /l r,2avzf(fsrnn86 120 km/h. The train blows its 400-Hz whistle. Tarli a2 n/s,n8zf6( rvfke the speed 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 toward a stationary train. The train blows its 40hnb8 k(2.e3l z 0e 5+ nc4p:htmtymjdo0-Hz whistle. Take the speed of sound to be 340 e8tblhj0 2kt.o3 : hcyz+npn4 md(5me 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 its 40r/l4vt.r ad 5q0-Hz whistle. Take the speed of sound to be 340 r4d rl /ta5.qvm/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 w09pfj ;zho +d5gkggp+ histle, and you hear a tone of 400 Hz. Take the speed of sound to be 340 m/s. What is the ac0 95+ ;fhp+ggko gjzpdtual 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 i ewh*vchjc 7n3h -,h 5:jyngdv0r5.iks 500 Hz. 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 trai kd5 hnhe5r0*3w :vvcci7.,hgnjj-yhn 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 hor fpjjj7w+2c )on is 500 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is approaching the train with a sp 7fcwjo2jp )j+eed 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 sigpw( 5 fl3 ootk8g+8rray0a5;b0fg cno1xl2qsnal is sent out, and a 42-kHz signal is returned. Assume the speed of soupk0 3 r0sq f ggf;xlw c(b5oyr8a2lt81n5+ooand 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 produced by a supersonic aircrafft7r *+ r oe/o4 wkldp lbm0k3wna*07ht 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-angle of the conical skmi v :+ r;-x9o3 quy4cidcz2bhock wave forme 9cr+bm vd-2o 3uk;cyi4 :qxizd?

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 Eur) shxy3+ye 6lqope with a Mach number of 1.05 where the air temperature isyx + y6hs)q3el $5.0 \; ^{\circ}C$. 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, 2024-11-23 19:26 , Processed in 0.474437 second(s), 195 queries , Redis On.