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 false statement? rmp1m 9e9lg.g/6qk 4ml3yz ww

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 throughddvswkasi1427phwzo 8 9hx 9s nk0dr(h 8z9(w

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
3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the speed of sound in ad+ a+y brp(ui3 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 ef 16;m3ljs9 nf+ csn;wp5.lojpa n5 pair increases, what happens to the velocity of sound? .e 1lsa5s 5p9n +w;;fpnjcnp m6j3f ol (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 sj3nd98ubc c bwfg6h9h3rp. a3qs 9)uhound, the velocity of a 200 Hz sound throubb3ud)p nfc 3j9hcs9 w hh.r 3689aqgugh air 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
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 wagci6-)fubl):3 y qm)x .akxycvelength of a 200 Hz sound i:a))bfxyi y6 q3cxcl.u -) kmgn 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 frequencies greater than 20,000 Hz are c8vjv.l nk*y,6u/t 9drf u3tnhalled

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 lescspv-5hwhmtta/3q2t x0,g wjv ,l1g:s 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 all directiong gnkxum)42d/ s. If you move to a point twice as far away from the source, the frequency of the soux4k2 num/g)g dnd 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 divergitw*07;qe lkgjddjo//t 4/,xdwo 3e ovng 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 distance d from the sourk:5+r ewxrp5m);rpkk ce is I. What is the intensit+;5rke w k:pp)5r krxmy at a distance 2d from 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
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 radiat y 120x7cb +z bm9h-qm*cobaoxing equally in all directions. What happens to the intensity of 1 mx0o9ac+xzoq2m7 yb*bchb- 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 that is radiating eqy psdn7ybm, y +e(9*aiually in all direc7mdy+ayn9 e(, ypi bs*tions. 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 following increases as a sound becomv x/tcfl00lx)es 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 ) 6:s1qbo :awlgmxt-e emitting a pure tone. What characteristic of the sound increl:gsqx:we1obt )- a6mases?

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 music3p7 t/ gq3o ;h/qarr0.5xp rgy8aizdw al 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
17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines the "pitch" of *wn8t/ vpe rr: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 into wlrvif: y4-ce6ater

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 ry 2v2l)sr ve2o0ztl:upk +n/ 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 wcl*ve6 mln.c1 ( dk 1kzg*t0kdave on a guitar string and the sound wave generated by the guitar as a result of this vib0 l1ztcg (kl.*nmd1 6kedck* vration. 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 openv.y xo b5,/eu,llx2ln 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 wavelengthj-aww s 9.3c kzkg00mn2oute/rd-ue7 s of the three lowest tones prokad 7 0ezw3-cng rmjewk.s/u2t- 9uo 0duced 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 L is by n;9j af;pwhlml.s+vd*r.5 200 Hz. Which one of the following frequa*sln +yp; lb;v.jmh5rfd w9. encies 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 resonating at.lp mk (;+g h: /zeyrw2jayepbc4f o9+ its fundamental frequency. Which statement is cor4/wp 9yef +oa.y;2r(lhbe kc:zj+ gp mrect?

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 wot 6)8b(omyo )t6dfjend 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 wa.wv-tfk zm g 21:yz:ze c67yi;xraf c*velengths of the three lowest tones produced by thisf-wz 1 7tyzfze cgriamx:y;:. *2vc6k 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 length L is 200 Hz. Whichb42z7gfvhc8 )6w s vs6x ()lpw mevui+ of the follo7 p) 4uhf6)v 6 vc8gz+sewlxb(sv2w imwing frequencies 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 frhqc8013z xwsfwjs z rd:t) j.)equency. Which statement is13 )cws 8 .:szqwh z0rxfd)jjt 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 thqv*c e vk5q z/tq4:xv0gm* 2ks( 3asfge same source. Each speaker produces a tone with a frequency of 200 Hz on a day when the speed of sound is f*c2kq0gsvm *vvkqzt:s x/5ag4(e 3 q 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 be-2:w toayysx*w;de8a ats, the two 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 particjk0,.z z x,1+djeiw ed k6q)ccular beat frequency is heard. What happens to the beat frequency if the frequency ocw c0xzq, )6 ie. kdkedjz,+j1f one of the tones is increased?

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
32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The Doppler shift expla+v69b/p.2jqpwii3b qx gq u+x 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 approachezno8 rbbxwzey-/ ) u:)dg rp 0u,;bg3cs a stationary observer. The frequency heard by the obseo,b)b0)uce- 3r zpxz ng;u/r:bwdg8 yrver 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 staqdi+eujpc 5qe83yoo h,kf 9j2nw, 71otionary observer. The frequency heard by the ob3 h8f ouy j7ioqqew5k1jc9 de+,2op, nserver 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-angle willa.4o.i;i;hi llqn mvm a*)xa - decrease by a fac l- lqmiao*i4im. ;xahn; v.a)tor 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 sou 2r 69rdqflyd-:shf+ ve.grv-zmoob81r8 k.end of frequency 45 kHz in air is 352 m/s. What is dz-.8 rfek8 grhoq9frl rsvvm:.16yed2o+-bthe 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 sounj xf5iz .5cv pe;ntr(.d 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 wr;q ku h)5:rcgmx/ p7of sound in air is 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s latgxu:7hc kw5m/rrp) q; er. 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 he* fn*ew(+4v)crsg *zr-;y p ofrlmy:bar the 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 s after seeing a flash of lightning, the distanc 6g2u rto*b2ube to the tbr2*26ubguo lightning 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 day the tebhu6,an zm*s-fbv:r)ocq7 fc 2w t z45mperature 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 deepf2 n(v6she glzgfri5 5q8v)e4 .*jnp c well and hear the splash 2.5 s later. How deep is the well? (Ignore air res(ggnvj6 vie 2s5f cl) r8nhpz4e.f *5qistance, and assume 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 air of a sound wave r u5z-ibrh6o .qso e8;of frequency 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 at 3/ jm;gfbgqiqdo8w. f.c0 k8mo9 )r kc$23 \; ^{\circ}C$ 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 innoo20diyade+x0; xzof74 w( ntensity $10^{-3} \; W/m^{2}$?

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-dB22it : hgi.qpa 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 inte m2vs0d: 6yxhynsities of two sounds with intensity levels of 70 dB0s6y: vx y2mhd and 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 byg 7zx9fe-d,vt(2lajqmnwv v k , -37ibwoxf; 3 15 engines in a garage is 100 dB. What is the intensity level genera;v 3fzj (w-x,fd7lvi- xm9tvqbkwo,ean 3g27 ted 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 ar h(j v+g brd/5(jeipej 95nz3 source that is radiating equally in alljvgb jrrjiee dh( 359(n+ pz5/ directions 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 ,nfn2fmo 8+hi9gg 5flw oc gejl .9s9u3c-no0from a source that is radiating equally in all gonw.m3,f+99-5 ghns n0l eu9gj8 lo2iofccfdirections 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, wcq 5tfoowsr*:l3)wd;o tx-i3hich is assumed to be uniformly distributed in all directions. What is the intensity level at a distance 5.00 m from the doift)o d;w3xlw53 *oc-q t:sro g?

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 5.00 m l*z4 6in qsy(axqw) ,sio ijv,*:dgj3 from a barking dog. What would be tw6,y zg( )q*los vj i*4asqjndix,:i3he 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 g86bucuda ,*g a sound source the intensity level is 60 dB. What is the intensity level (in dB) a 8g6cg*dbu,au t 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 point source is 95 dB. a25xtq p 42ses -x,y,y:futxl At what distance will it be 75fy2,a4sqy 2ltst x-xpe5,u: x 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 9o6birn 3ogcktd :9s-,2a xfptone has a frequency of 1200 Hz. What is the freocra:k idsp, nf9 3tob-g6x92quency 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 harmonic of an open pia791 n q7hxznipe is 900 Hz. What is the length of the n 7z9x1iq7ah npipe?

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
58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The lowest tone to resonatek rh;zzrykdp00aogbb;1 w(2. in an open pipe of length L is 400 Hz. What is the frequency of the lowest tone that will resonate in an open pipe of;kapr g0(b z1hy;2wkodb r.z 0 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 the velocitk55 ,:yg oo9jk.ujj4d5kwi sey of sound455:5o j, k9g iksjukwyjed.o in air 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 room wheret/f :-s9(tne d)zx b xon:1umo 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 q/f4k15 hbz )7 v9pqcngldp,d at one end is 330 Hz. What is the frequency ,pq dgv/p)c n5q9bzkl4h7f1dof 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 oz vesy ;,/gg5d+nladvj,bzv 1 zekcu/0ti4 +2ne end that will have a fundamental fj vv/+uz/,vgdd na;54k1zcsyz,i +e2g 0tble requency of 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 uj*yez.. w hgkax90v8hyv8 *kin a room 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 te h9 bnb9j/ fl1htw/ixox .su-)bm1ve2 mperature is $20 \; ^{\circ}C$. What is the frequency of the second harmonic 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
65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A closed organ pipe of lc/0 dmy*;wih59 tcsah ength 0.75 m is played when the speed of sound in air is 340 m/s. What is the fundamental frd*i95s; mwyc hahct 0/equency?

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
66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider two pipes of to0w.ve3kervpnni+2 xb b-.ah +bm7g w+z u20che same length: one is open and the other is closed on one end. If th0 c7nvo +k.bh e vxnez -rm3pg+ 20abw+wi.u2be fundamental 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 ea; nb74tbn n.hnch emit a frequency of 800 Hz in air where the velocity of sound is nh t7nb4b. nn;340 m/s. How much 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:    
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 side by si*68zb b t bhrlirojaz-)ic 89(de 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 speed isiiz6z9c8rtb*j )b-8( l r boha 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
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 beat frequency? 8k;yls*nxyzm(7rw6a/q, m r ak2puq*

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 4 m:q:y.6t-otx gklkgfork to tune the frequency of a musical instrument. If the tune.-:xog6tlq: k gmtyk4r hears a beat frequency 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 sounr;uf uzz3syh (qhxi3 -8;gjsgo3oky/ 6 x2t(uds produced by two horns are 6 m and 7 m respectively. What beat fgy y/x2h3;u8 k3 qu( zfs63rsiou; tg joxh-z(requency 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 ;tj * )emrj (mv:1e*hbce/r)wal*kip violins in an orchestra are found to produce a beat frequency of 2 Hz when a frequency of 660 Hz is played.mj)ev:jrc ht mk*eip*w;r al(b/) *e1 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 ( qs8gdperfvm:3 v 0+bsource at twice the speed of sound. The observer hears aspemgv8qb0v: fr3d(+ 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
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 stationary observer164mxpy4wx hdsgpdsc))c6 xkz( v g3+ at one-half1cgz3p+ m6xc(hs)y4x wd)6pgkd x4 sv the speed 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 1000 Hz. If a listener moves with a speed oft-.if +m ugv.g 30 m/s away from the source, what is the frequency heard by the observer? (The sound speed is 340 m.gt+f u.mgi -v/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/s6ln):s dr cck3 on a day when the speed of sound through air is 340 m:6kc)dcsl r3n/s. 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 by a stationary observer when a train approaches w/arw:mwq.j u1klf(c:ith a speed of 30 m/s. The frequency of the trainml /w:(u:kw.j ar1qcf 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 e8ef :1dafjj1af3 fh;blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency do you hear?ejj1ea8a ;1ff3h:d ff

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 bt,o w9rp :-p4ukdt 9malows its 400-Hz whistle. Tak9:t adr pu pokmt-94,we the speed of sound to be 340 m/s. What frequency do you 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
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.d4uj.4d6em z2sw1zdv The train blows its 400-Hz whistle.su m2.d4 46 jdwezz1dv Take the speed of sound to be 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 odhna3*m-p5plg)zyz/ /sp *hblows its whistle, and you hear a tone of 400 Hz. Take the speed of sound to be 340 m/s. What is the actu5g p h**/3) /-hlappoznsymdzal frequency of the whistle?

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
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. Assume th0f4bqy,:y0 fbonm6ixj t h2-p e speed of sound in air is 340 m/s. What is the frequency heard by an observerq4npbf0i ymo jyh0txf -2b,:6 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 the speed of sound in air 7rl )-e,e zud.6ilupr,u3 fsris 340 m/s. What is the frequency heard by an observer if the observer is approaching the train with a speed s7u3 erlfe p .zr,lrdu-ui),6of 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 ac44 mt lleyd2i/hrt/ onm 2-m-n object. A 40-kHz signal is sent out, and a 42-kHz signal is returned. Assume the speed of sound is 345 m/s. Hoi-oh/mm4-/mt 2 rn4td yl2elc w 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 au-r3z:w x+4uod4e ke 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 of Mach 1.4.m il. q;w6p)r,t1abec What is the half-angle of the conical shock wave forma6i ) l.,ec1;tmpqr bwed?

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 f3r0t)tcvdjn: 9 bhr) to Europe with a Mach number of 1.05 where the air temperature rr)f0)t d3tvc:9bnh j 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 06:29 , Processed in 0.453078 second(s), 196 queries , Redis On.