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 ,dh9te7r 6+7yqzf2ztkjq po .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 condu3nzfwwr( i6c 4 ug6hx6cted fastest 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 of sound in a steem;a dg58)/g*svvtw;v cn lgbgu 849qf l 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 d1g:h du72sq2 uwg;uw increases, what happens to the velocity of sound? (Assume that all other factors :dsu2g 2w q7wu1d;hguremain 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 n5 o mjj8pf.5h(d2y+myc irv(400 Hz sound, the velocity of a 200 Hz sound through a.2v5fm j iyjyc h(nm8dr5+o(p ir 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 wg uj zh2+)1nwhavelength of a 200 Hz sound in air iuw )n+gh2z hj1s

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 callexh e:lz) gs(dm02e0vrilp6brs8v60v d

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
8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Sound vibrations with frequency less than 20o42enf 0sl 0sxz egn42 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 in allghpd9npl*cvzme qjcw (/5lb.k/- hu;3x s;z7 directions. If you move to a point twice as far away from the source, the frequency of tg-c(zc upd 7hlw xle;pkbmsvh3*9j / n5/ z.;qhe 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 is prob3ys+xb32lia x10b 5fw: nuvcportional 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
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) eh:4 jdfoltlq/.1p (c2ih: 1mibxyq d from the source is I. What is the intensity at hc4xjqb1lmqepyih)d:(tf1/o :l.i 2 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 radiating equally in all diny8hx*ej) q grv; dt-)rections. What happens to the intensity o8ed ) )qj yrh*tx;n-gvf 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 equalla6wwh6+ldb2t- jkf0 uy in all directions. What happens to dk+-ultf 2 6jawh wb60the 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 becoxe9mvp lob/)6mes 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 emittin)lz9np-o7 bf1* z9fy.h vfqzd0 pn 2dqg a pure tone. What characteristic of the sound incf71 h pqn-*0z9fvbfz .z92od qnpyl d)reases?

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 "lousnk54 kbq:bp apire)8,x; h7s (innu-dness" 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
17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines the "pi8usee 5kug75a tch" of a musical 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 fg o6v*)c(nxp6ufz .g air into 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 displacementvs5fyj3 wlf 90 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 a guitar string and the sound waveg,q fpr y:*ru*hde1:-0tbu6niwm :e p generated by the guitar as a res*u0p-d 1nrgm:pr ,f*qthei:be yw u: 6ult of this 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, t9ux dds9q6cz ;jb(2 aghere

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 wa-a(rz o3xbl (gvelengths of the three lowest tones produceg3(- zo lax(rbd 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 hp54.6 x/ nkw .y;tqmop-vx z7hbp 5piL is 200 Hz. Which one of the following frequencies will nntx45/zp p wb5i6phym -x7pq..v;ohk ot 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 its eo)t sr4.xmp 4fundamental frequency. Which statement is )4oer xsm 4.tpcorrect?

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 oth aogkpwr7*e *-jkn*6 ze wmf8,er, 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 -4y ,nlwfkgn- of length L. What are the wavelengths of the three lowest tones produced by th y-knl gf4,-nwis 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 2m4gsx9)o7zolj3z6x k 00 Hz. Which of the following frequencies will not resonate in 469xmk 7gso3zxo j)zlthat 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 frequen-uq0fpy07u2d yh 7s f1)z/3zyzwcx dvcy. Which statementq70 yfx vwz103y f/z2- dspd huc7z)yu 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 f c+g75 wr i4vbzp6wxrfu;varu6/ /;h driven by the same source. Each speaker produces a tone with a frequency of 200 Hz on a day when the spc;g5 fxr 7v ri p6;rfvw/hu+/b6u4z aweed 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 soumuq zi0qg3/g7pa n4:rnd 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 sound1v 9ydiwgn 1)fed together and a particular beat frequency is heard. What happens to the beat frequency )fvg11n d wyi9if 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 expc)z (l j;g8bhaj5,lw p1fujrj (o.m (sd:b,vv lains

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 hea- ll/r6zbkkj 5qtuu0cv14 g c*rd by the observe/j4qlv kc*l0t- buc 51kzgu r6r 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 stati.uvy *5iu2rcq onary observer. The frequency heard by the observ iqu*ucy.v25 rer 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-spe alqw2b(n3e 3bdft8fn1m 94k ged, its half-angle will decrease by a facto3gnad lbq923 f48e tw1fmnk b(r 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 inqaycs0 x n:1ps/+/kos 352 m/s. What is the air t/ sc ypao kx:q/ns+1n0emperature?

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 sound in air (fx mt78uugo f;p g(, nbx:4alat $0 \; ^{\circ}C$ 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 shriek wfkeas mkcz7 z+lx)thh,bv g j)/ 9(/k,hose echo reaches it 0.0250 s later. How far away w7e/9ht lkvs,)f+ a z/,)g zjxkkhmcb(as 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 tempera+yn-j 9ck-0;(tmqw)fqq.bvg ivxpy8 ture 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 / wiv.53gd+w7 mynys wahuu4 :a flash of lightning, the distance to the ligam/w4 ng hy dvuy.5:w73 +wuishtning 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 frooj/rn4*v- r w- lbxiygbo11/ nm a cliff on a day the temperature is $15 \; ^{\circ}C$. Approximately how far is the cliff from the observer?

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
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 .av*3 cfa wjgl:n17 jeq;u(xo. How deep is the well? (Ignore air resistance, and assume the velocity of soun*w;u1jjnl( fe3vg:x.oa c7aq d 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 sounv6gyb )ly( /yhd wave 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 airqvhos**i8l kigw2z i2k -qw: + 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 o b(p xl/x*o8mif 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 intensityohamu64) a3d9s vl2r gp+qq 1y of a 70-dB 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
48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the ratio of the intensities gkku9t-g lk, bf-d/:iof two sounds with intensity levels of 70 dB a,-b d uikgk /9ktl:g-fnd 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 a garage is 100 dB. What is the inm lhtxnszx-gsf5 at: +0e ));jtensity level generated by one eh :5ttx+-;j0mlxf geza )s sn)ngine?

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 frox51cmx ff .yu p;02pqzm a source that is radiating equally in all di u.xzxmpf c512qfp;0y rections 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 rqvld:1gacg 5b67,(8ee d djdfadiating equally in all direcle d:v1jced,gd a(56gq78 d fbtions 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 xd4j+45bul s y( z*chpof power, which is assumed to be uniformly distributed in all directions. What ix4 +(u *bjyc4p lzd5hss 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:gjn 2rz 6ixs) at a distance 5.00 m from a barking dog. What would be the intensity level if two identical dogs very close to each other are ba26gjs)ri nx z:rking?

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 soundx 9h6vmimjq;)xz-i3 a source the intensity level is 60 dB. What is the intensity level (in dB) at a point 2.0 m from the source? Assume that the sourm 93i-; )mia6jhvzqxxce 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 9um4;;0vd1yyt gn6 5 yuck g6vb5 dB. At what distance will it be 75 dB;6uv54y 1c kmg06ng;utdy vby ?

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 tonhkl s* m/t6z47ku,eg ml0j9 dye has a frequency of 1200 Hz. What is the frequ, jm9z/*ye6m4dl ug kt07lhks ency 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 pipe is 900 Hz. What ipn ms8 )jdtx.ab59 km (/qx 9:efgxdo.s the length osamfde/9jom. 89ndkqx :p) gtx b5(. xf 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 is t.vjr 8e) rj f;hav.e8aq4e 3y .sq(wdyhe frequency of the lowest tone that will re.fa)v s.y8hye3 j r.ja8v4 r(w qeq;desonate 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 leng*vcd;g2 ,9loaviw; u ith of 0.80 m. If the velocity of sound in air is 340 m/s,,2;u*i ocil9a g;w vvd 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 ro ln9knog- 6)jedec o2dkq4y7 9om 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 the fro s -c6t; /um;i2vilfaw1tbu( equency of the third htauwsl; 1u- icb/v; o(f2m6t iarmonic?

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
62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the length of th g1k t53iiavv;e shortest pipe closed on one end that will have a fundamental freque 5vtiv i1;kg3ancy 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 inqcl xet( (3log(v6d9w 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 tempera1e+g,fbl flt luw1 p71ture 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 sra8;vcas 2k+ez8l:i found in air is 340 m/s. What is tairc8f; le: kv8a2 +szhe fundamental 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
66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider two pipes of the sametzb ndkz88t 4 uel1n+* 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 t1t4 * n+tu8d 8nklezbzhe 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 ey/ ghagk-vk **osf u3k,46tz cq4h,xtach emit a frequency of 800 Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to bgh4q ytk xfg-6/, hvktauz*3* ok 4,cse 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 d + cdo5l5*lhp:xh 2btdriven 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 is 34t ldl5 :cp o5*bd+xh2h0 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 frequenc x h6o8ss4f;maies 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 to tune the frequency of a musicbh.dk e *xl -lpr3yk(:al instrument. If the tuner hears a beat frequency of 2 Hz, wh-*k.yd rl e (k3:xhlpbat 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 produced by two horns are 6 m and 7 m respej9 qrb ;47q7 xees5wtkctively. What beat ;r xq4jq7teb9kew5s7frequency 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 viuyvz+s )xq bp7co.a . /9v7tzoolins in an orchestra are found to produce a beat frequency of 2 H7 q.tx )zubv ca.o/pz7s+y9 ovz 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 stationarn5ymtnc5mq -e hk ,5nz,9g yrg y*4w w9:bdn1dy 1000-Hz sound source at twice the speed of sound. The 9 w-d4z,w:y5d,m mtn9 gng1qhc y*eb5nrn5k y observer 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 frequency offu: 6xd(l,bghcnfmuth lc *+4b, +.c x 1000 Hz) approaches a stationary observer at one-half the speeb,f,4tcu fgcm+6nhxlb . u c(*lx:h d+d 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 of -b:bx kg-xn9 n30 m/s away from the source, what is the frequency hearkg-b b:nxx-n9 d 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 lu/6d aaf;8ev siren. It is traveling at 35 m/s on a day when the speed of8 av;edf/6lau 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 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 9ib slgi -ev7/xwjd2x8fj4 ;;la4exzheard by a stationary observer when a train approaches with a speed of 30 m/s. The frequency of the train horn is 600 Hz and the speed of sound is 34g 79lji f- 42/xxs;;b 4az8 xwlievedj0 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 blows its 400-Hz whistd/z5 nwp2cy1y5sf 9.l:ak0fcqdm ,m yle. Take the kp 21d.s5nw0yq/y9 cz5l mda cy:f,f mspeed 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 stationv1u s yb:nk4 0pcdi,zc b*5)osary train. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency do yon4c*)pb5 ydc so ,: 1v0bikuzsu 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 l2om6ws7 bcfynl5iv2vk; ;oc;s;si6 its 400-Hz whisoncl;m 7i56;sisv2fkb cwosv;y ;26ltle. Take 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
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 whisw58+ /m imjn t.mwgo6 i5xc9l f7i;ykbtle, and you hear a./m5iy9j76kwg+ w5 iin bx tmol;m8f c tone of 400 Hz. Take the speed 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 hoxt 7 f0;sv.yxz+ nrr4mrn 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 moving away from the train with a speed of 30.0 m/xnzm.svt4 0fr ;7y +xrs?

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 5q: i1 jul9-n /pnwxxrx)kiwm6te +7 qsound in air is 340 m/s. What is the frequency heard by an observer if the observenx5/xr wxi9+m 1jwlqit:7k)u- 6npq er 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 deteb58sw3+:srx3+ ym tky d,xr aarmine the speed of an object. A 40-kHz signal is sent out, and a 42-kHz signal is returned. Assume the speed of sound is 345 m/s. How fast is the object x5 3b wydmrsx :,+sakatry8+ 3moving?

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 produced by a supersonic ayjsboi l f i,:67qhx10ircraft 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. Whq4h-(+2hkp ( r9j usmc6mb opaat is the half-angle of the conical shock wave formedb 9(ph m4(hj+oa-26kp srumqc?

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 Stat40ib6edfp3ob es to Europe with a Mach number of 1.05 where the air tempdf0bbo43i6p eerature 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|手机版首页|使用帮助|题库网 (https://tiku.one)

    GMT+8, 2025-7-23 09:00 , Processed in 0.482711 second(s), 195 queries , Redis On.