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 fa.*18wa r ii)8kbtcwj jlse 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 th nqhno w+52j,mrough

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 so w-7,(vdx(vx jpd5 w7dicuo 8pund in 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 aoo -7sx5 4 h brk6ba0+dxsz3roir increases, what happens to the velocity of sound? (Assume that all other facr46b5+ zsos-o7 rax03kdh obx tors remain constant.)

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
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 sou bp6 m/llsb2u6jq x7u, us73nund throughlu 3/ 7bbnpuux 7l m6u6s2jqs, air 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 ig 08ipn7xk *bsound, the wavelength of a 200 Hz sound in p7i8nx0 *k igbair 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 tha m/ ,kv. pbvfqgs;tn,6n 20,000 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
8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Sound vibrations with5u7,6p+.hat: gl:4pt zldeppr bnji3rje3y, frequency 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 sog uno2i9feylx emfdk74ze4 .kl7,1 ;aurce is emitting waves uniformly in all directions. If you move to a point tw;9n y.fk4,imk 7feaxe4l 1 e27luzgdoice as far away from the source, 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 wave 8 (j/;w8gscgriu)hag s, 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 source is I. What islkd)m(b l;cre l.p6h+ the intensity at a di+kl h6c p)lb(l.;redmstance 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 source thac np k(htpdd9.+q 1 yi29dx(hat is radiating equally in all directions. What happens to the intensity of the sound? h2hxqkd 9yp 9(d+cn. ai(dpt1 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 all dry7b4ap gn gzqe(52s9irections. What happens to the intensity level of the sound? 47y(r92sg 5agen qzbp 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, rk6gk:s z6ca hqdbe )1t35ubkc v,l: 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 pure tone. What characteristic ofxi(1 pm1em5/h 3lylia the soundeil /h3a ymxmil151p( 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 0 w6wcfyrtv4 o-e )hhwzqd234 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 musiw x0dmv (hm qj0sehhf-4z +s;duw(,9e cal 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; j(lmd 30exhf 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 displacement wf ixs9c7rpf.f d-ah3 5aves are

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
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 sou*8z8g(6mbgc .zj apnrnd wave generated by the guitar as a8mag(6.rbc*z z8n p jg result 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 whicn 1 a0,jjbs*kyh 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/6sj*w-kvo-29m 0uh f h9v5psj mhqyt the three lowest tones produced by this pipe96w/vt5 s myq -phhhuo - s90jfj*mvk2?

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 lg * msi6jnl(c7(*+fj nhfgq3200 Hz. Which one of the following frequencies will notg( 6h*jmn+3ij c7f (qfln sl*g 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 fn*c67 qm+yr k1 tb6lsits fundamental frequency. Which statement is correcm 6*bl+s7kyfrq6c tn1t?

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 - ugs rh-* i)izvm)+ktwhich 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 lew ;o(w)fu7 jkvngth L. What are the wavelengths of the three lowest tonww 7jv(fko; u)es 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 ofhoh,mxd,j6of;z s 8 z0 length L is 200 Hz. Which of the following frequehfho;m jz,6s0z8,odx ncies 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 clo9: l ew)1ca kr8wwmkx0sed at one end is resonating at its fundamental frequency. Which statementwc:0ra)w xw8k9ml k1 e is correct?

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
29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A person stands betwe8ys s*ne,/o ; yat(j+k+ct symen two speakers driven by the same source. Each speaker produces a tone with a frequency of 200 Hz on a day when the speed of sound is 330 m/s. The perso(jkcs+/8; *e, ayos t+ysytmnn 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 dl i5w (tt*u5ztwo 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 togetheky cc3tgh1q4m 1d77m f9v+dwt2b 9we cr and a particular beat frequency is heard. What happens to1t1 c4ve+d2myd9hg9f 3 w7 qcc 7bktwm 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 expl1 izlz mp+w7o97mtze,nv5 p 7dains

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
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 ha *q6 ;uze9mfob-(fdheard by the observer m9euq df ah;bo*zf-6(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
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 the -wm5e aceth(go:*p* a +;zbb yobserver igo5;m(eep :z+bch t-wab a*y* s

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 doubyvg (hl 553hh-vqbu. 0hc( vncle its MACH-speed, its half-angle will decrease by a facgh5 hucbv3-.ycl0 q5n hvh((v 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 sound of frcn y fj:kl6tx-xw uvdrwaq1o,a29.3 0equency 45 kHz in air is 352 m/s. What is the airftr39j.w ck,62-qow1nalav x:xy0 du temperature?

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
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 atk6 fzc f-e ,gqa.k;l0m $0 \; ^{\circ}C$ 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 of sound in air is 340 m/s, a bat emits a shriem( xi;v w3sod+k whose echo reaches it 0.0250 s later. How far away was the object that reflected bw i( mosxv3;+dack 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 cliffo1en*d /ot w mzv*r29q, and hear the echo in 4.00 s. The temperature 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 a flash of lightning, the distance to9qj 3sgs1exv( the 3s(v1egjxq9s 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 clif 8 dwanio*01xzf on a day 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 aw +q5 9hvr2mm 2-zmpiand hear the splash 2.5 s later. How deep is the well? (Ignor qmwmvp 5mz22h-9a +rie 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 frequency 50pj(bhm5 i vp070 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 atm.+h my)ra6x*xt8 gg 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 ofw7r gz3,,b6v9ql, go hrxggu; 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 xy*uo+ro5;u t 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 /mq g4,tua8qt of two sounds with intensity levels of 70 dB and 40 qu qmgt/,48atdB?

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 engqjqj412kowb /( chm qlg uok5*si k,()ines in a garage is 100 dB. What is the intensity level generated by o4,* kchgos( 2 ioblqq kjmkwu)q51(/jne 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 75or k90mjrt fa source that is radiating equally in all dio5jr 90kr t7fmrections 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+go-e.3dd)1ox w ehed a source that is radiating equally in all dxoee. 3)1d+godewh - 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 delivers00vs, s)uo uj ikrkh92 about 1 mW of power, which is assumed to be uniformly distributed in all directions. What is the inten0k s ,svu)92ouhk ri0jsity 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 dBha2z-f1nsj bfh) 5cq8 at a distance 5.00 m from a barking dog. What would be the intensity level b2fa5- f1cj)nz8 hqh sif two identical dogs very close to each other 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 intektpxejwsdj 2pe+ /;47nsity level is 60 dB. What is the intensity level (in dB) at a point 2.0 m from the source? Assume that the source radiates equallpjk/td p;72w4 esj+ exy 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 f6kth2jj z-far:k8v ,srom a point source is 95 dB. At what distance will it be 75 dB? fk 2jj,:azv-krsh6t8

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 ucq0n/gdb tv*8inex4, p;fdj2pp+*b frequency of 1200 Hz. What is the frequency of the fourth hcx42pb8tfq**ijp dpn,dbu n0 /egv;+ armonic?

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 qo6p0q9fnes 3 Hz. What is the length of qso3nep0qf96 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 inlw9-uqf o 7s)j an open pipe of length L is 400 Hz. What is the -wu osjlfq7)9frequency of the lowest tone that will resonate in an open pipe of length 2L?

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
59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An organ pipe open at both enz/gf+ice.i5qaq dbjk(u6w b8d ;., k jds has a length of 0.80 m. If the velocity of soun zwda;d 85q kj.6qbgk bcueij( i+,.f/d 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 -wc6a :. stt)d c;y,ztizxhz3d wb4y7where 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 at one end is 330 2mbulm 3xvgtqopr 65-*-k o2;m5 dnouHz. What is the frequencypq2 - v23t6ou-lo*bk5our5g;xmmmd n 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 clorxrcv,7mdq8;z7jgoc8 g; l 2c sed on one end that will have a fundamental frequency of 60 Hz on a day when the velocity of soujx cgqg,;7o8rlc8vz 7md2 c;rnd 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 in a room where the t0zw nfn;fh,0 ed*6onv emperature 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 rne6p//sv7. to ,y zgq5lyyy: 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 ws 4dwcw l7idj e3 ;;re1pf5lf3hen the speed of sound in air is 340 m/s. What is t5lc7 l3;sew fj;dw1ire4p 3dfhe 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 is closed 0k4./qhlvy d r /xtq,ton one end. If the fundamental frequency of the open pipehq.k 0d,/ tx 4qyvltr/ 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 aij q22( ysas+jar where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved so an observer in fron2qa syj2( sj+at 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 sk4: 3hw td).nlbn1 zakide 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, which4 akwd:l z1k. hn3)bnt 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:    
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 fnoz(v5zr, j,yo x6cjy37 z-y6xjj r*nrequency?

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 mus ytzb*r,1zw p+ical instrument. If the tuner hears a beat frequency of 2 Hz, what is the frequency of the pyr+1 zt,* bzwinstrument?

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 me.q nzs5n57pp and 7 m respectively. What beat frequency is heard when the horns are sounded on a day when thepn5p.z qe7 sn5 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 i8.th+zb:)n rwbir 9s an orchestra are found to produce a beawi8.:i9 bhsn+)bzr tr t 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:    
标记此题
73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An observer approaches l(.jloxmv,93 am5 5j7zbjh jfr se+h( a stationary 1000-Hz sound source at twice the speed of sound.lhjv sxh( b5j7eo (rml+5f,jz.39am j The 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 of 1000 Hz) approaches a stationary het:ce,9v( tpobserver at one-half the speed of sound. The ev9t et phc,(: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 30 m/sfy1t1 pqsjm);.d; )ti zql9f z0gcx(n away from the source, what is theqz; tmxq9 ft1)gn );yczps0(1fijl.d 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 j pkuke(3 ;7aae* t5hfspeed of sound through air is 340 m/s. The car approaches and passes an observee *;f7p ae 53tja(kkuhr 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 approachel6qg0 inrzv *)s with a speed of 30 m0q)nl *i zg6rv/s. The frequency of the train 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 bzufs6s82n 7 a4utydg ;lows its 400-Hz whistle. Take the speed of sound to be 340 m/s. u87a2fysugs ;4t6ndz 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
79#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You are moving at 120 km/h towary-q0(ur v yh e 7, qgi,2wk+jxxla*c a23tyok3d a stationary train. The train blows its 400-Hz w3xh jwl,02q(3 o,i -ykkyt*7e arg +a 2yqvxcuhistle. 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 120s9fa-4am kovtu8 cu5( km/h. The train blows its 400-Hz whistlt5-s4f cu 9vko8(auame. 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 blows its whistle, and youd dcoqf1j)/gdfg(o6/ipndo / d9g3 7v hear a tone of 400 Hz. Take the speed of sound to be 340 m/s. What is the ac/odc (v1q3i)dfg/d dog6jpo7 /9nfgdtual 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 is 500 Hz. Assume the sp/ ;r qgrjl1yk u0jzr(+ ;gg2wleed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is moving away from thez(; y j1k;wjl0u glr/2rg q+gr 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 is 340lav/gq,r/ *l8wln( :v h.b l 0kqiy.)gcmj+ az m/s. What is the frequency heard by an observer if the observer is approaching the tragngq* ia:qv.r 8 0)a+ljzl w /l,.vhb( ymk/lcin 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 deter)0ivs 5ut 8drnmine 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 mov)vurt nd8si 05ing?

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 supernt u(8whxkyih o7h6;/sonic aircraft is $60^{\circ}$. What is the Mach number of the aircraft?

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
86#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A jet flies at a speed of Macgg)e uo)agg:94o*bz k /;dff qh 1.4. What is the half-angle of the conical shock wave 4 /bgf9*uoz qkgfoae)dg;:)gformed?

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 numbaov jl,mz0.c+ak/yla ) , q2wker of 1.05 where/zaq vjkklm,0+ .ol)w,ac2ya the air temperature 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, 2024-12-4 16:47 , Processed in 0.462421 second(s), 195 queries , Redis On.