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 falz,apau1 9x(r gse 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 congu ix2 6b10f5htlv -o52 tsoqtducted 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 )vn h7ryoz2t 4hd+.pf6nz l ap,xb17m 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 ec il4a0pd7-w increases, what happens to the velocity of sound? (Assume that all othe-p l0ad iw74cer 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 b0g:.u jdu45:xnr jz5,qrywyvc/6 qe 400 Hz sound, the velocity of a 200 Hz sound through air isw 5y/xz rnd,qyuq4jr0 u6j be 5:.vgc:

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, thk(im ;.rfs76: k9um1vl j ugaze wavelength of a 200 Hz sound in air is; izsfua9krjk:76m (1.v lmgu

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 frequencieclinq,0io01d tva ;*es 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 thanj r5qri;u:t9 yp+5rw c 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 sourhd (roq :)h6o:k7 jlpsce is emitting waves uniformly in all directions. If you move to a point twice as far away from the source, the frequency of the sound )p6:(dqosr:kjlh7o h 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 ncdu 0w:pi6ukg vzih, 2)5( iewaves, 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 so4aqez*2a1fd 1 yvmz r7urce at a distance d from the source is I. What is the intensity zra dm1v *feyq1a247z 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 dist llyrs.n) 10bg1a az)bance from a sound source that is radiating equally in all directions. What happens to nsll0gaz y11) )arbb.the intensity of 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 rahgd8r(ql6+ e7zq e -s fjo)7modiating equally in all directions. What happens to the intensity level of the sound? e7 -f s6()orhmjo8qql+de7zgIt 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 in2 f7dzgto ;,j 4bilta9creases 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 pure tone. What characteh87 dm7scki v8ristic of the sokd s 87mv7i8hcund 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 h0w+ge .qof8q1c;kwu 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 musical yxuy(z/)t l g;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 frod-6r41c ckxrx o)u c-wm 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 waves a56*jtc jr8(;isd pg;6knk5 lghs;yzu re

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 v9h;y;;k7w1e9dcq,2q lja q 9 ondl gswave on a guitar string and the sound wave generated by the guitar as a result of this vibr;d2 nlko 9 dgq7,;ws9v1y q;j ac9qhelation. 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 w 0x+xfgpl v)/hy j0n2jisf .2ends, 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 wavw1j (lyip (5 xfcvi1s8hv- ;qyelengths of the three lowest tones produced by this pipe?l1 sv (fiwcqi8-;51xvhyp y(j

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 resonatem sjwajd419,5rt4 i fd in an open pipe of length L is 200 Hz. Which one of the following frequencies will nd451js w94fjd it, marot 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 itsdp)+i6w2tx4- krwy-vuvlz +z,on ;je fundamental frequency. Which statement is corrup e r-d-+i;6zjvwyknz)+2tw ,4xolv ect?

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 enda +a;p:/cnokbc(xj(qdbgy2. 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 ,:c0 b3sz8jwxf;y qmbvelengths of the three lowest tones produced b0yz8 x :bc;qm3 sf,bjwy 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 is 200 Hz. :te: *cb81mm i;ih ,u6yp bnsb Which of the followbt 6:mm*eihy s8c1 ;ub in:b,ping 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 frequen2)21v kv8bk:p nx e;dku7w kx( dsd)chcy. Which stat)2:ebspk k7k18w x dv2xcdnku(vd ;h)ement 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 f0t cc9;ap0vm two speakers driven by the same source. Each speaker produces a tone with a fr0tca9 ;fmc0 pvequency 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, th rnh*zl(eo wj35+3s w + act7eg:ob+jke 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 particular bn4c0trgbd q,t.*k e i+eat frequency is heard. What happens to the beat frqe. ntkdb4 i ctg*r+0,equency 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 explai*7 jkft g ow ath6kmq40hj)*y8ns

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 observertte7gx3 d+.ay6t; ux d. The frequency heard by the observer id;t t3eax.+6x tgud7ys

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. Th-rp/lig j2rt/ e frequency heard by the observe/plt-/g r2i jrr 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
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 x-l k0+j)n/a opngiy 0)d)h echalf-angle will decrease by a factorck)dxa/n e)l 0)y oi+-hpg0jn 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 kH ( 2 lu(p-/.zfuk.w02vwy otoow5uyipz in air is 352 m/s. What is th0.oo2. uy-fzw u( pplvwkw5( 2/tiuyoe air 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 at z 2n(9fmuu0wea3 eo:p $0 \; ^{\circ}C$ 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 whoiah;iacyg8) )i;v 5ifse echo reaches it 0.0250 s later. How far away was the )aga5hi)i;;fyicv i8 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 thih9eqxlzhq0cs 52 +9w e 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.bb tay467)dbr iz 4r9j0 s after seeing a flash of lightning, the distance to the lightning strizr7y4bd a469jirt)b bke 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 b1vdac l76dr1s from a cliff 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:    
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. ;ayn:dgg6 ;p.lbwowdyj- lieh*( (z;How deep is the well? (Ignore air resistance, and assume the velocity of sound is * l ;lybegiww:yh(pjon azd6-;d. g ;(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 50d l:g,p l tx/b*pd)+o o95kztzjfq-d+0 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 atxr)x-w ro7c n4 $23 \; ^{\circ}C$ 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 0ff1i 2y 0zhltwith 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 oj6yu-r9 sn4i8 l(bpm cf a 70-dB 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 intensities of two sounds with intensity levels of 70ucz1)ia 0v+/ej bdeb+ dB and 40 0u+)1+ dje ivb e/zacbdB?

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 intensityfmkii+l 9-v)sli +nh.5kyxya 7x9;ml level generated by one englyiixs 5 h+nk9vl7xy)9ak+mfm- l. ;iine?

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 is radh)rz b(nm1.n(pa)mn9t / r cygiating equally in all direc9gat/hn(r(m.rzn np)mb c )y1 tions 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 o.p58qtwh/cjpg sy.x;z0 oz0 lf 6.0 m from a source that is radiating equally in all directions isppyztq.x0z5 c.ojh80l;wg/ s
$6.0 \times 10^{-10} \; W/m^{2}$. 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 r,avx )gfo t.4assumed to be uniformly distributed in all directions. What is the intensity level at a distance t4xgr.ov) ,fa5.00 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 distance p; :h3 ru9ifgu243rc j)quxox5.00 m from a barking dog. What would be the intensity level if two identical dogs2ug;9i x3c3 u:ujh rqxprf o4) 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 inte c/bd8 22zxb*rc n7ootc0nra,nsity level is 60 dB. What is the intensity level (in dB) at a point 2.0 m *7a8toco 2bd/ nbrn0x,2c c zrfrom 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 z;u4a; ly4u gl5.0 m from a point source is 95 dB. At what distance will it; ly uzal4gu;4 be 75 dB?

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
56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The third harmonic of qhtma m c6a3/g2gs- 8da complex tone has a frequency of 1200 Hz. What is the frequency of the fourth ht8 agch63/mg m-ds2aqarmonic?

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 harmoniczzyt)siauh 3 5n,d,4t of an open pipe is 900 Hz. What is the length of the i3z )ntuzyda,sht,5 4 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 rs7uqeh*vbr 1.7 lt*fuesonate in an open pipe of length L is 400 Hz. What is the frequency of th b s*77vh.rteu qfu*1le 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 has a length of 0.80 m. If the vei:r7nz e m63tklocity of sound in air is 340 m/s, what is the er67tz3:imk n 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 where th5 j:d2 h7lg u8o5njploe 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 pi9crbg8w4 oau 6pe closed at one end is 330 Hz. What is the frequency of the third harmor8ug6o cbaw4 9nic?

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 ox v k-l+pjqs :p*x23mof the shortest pipe closed on one end that will have a fundamental frequency of 60 H* smpjkx:3 p-vxlo2q+z 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 in a room wherezzlnsug y 2c4k1 cwnm/9z(-6x 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 temperature is q; c/16zsnwg4g zx4yz r bd/c)$20 \; ^{\circ}C$. 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 p zhk,tjq1-io7 9 nqke7layed when the speed of sound in air is 340 m/s. What is thq9-1jh n7,o zkiktq 7ee 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 othyq:y96d sed *wer is closed on one end. If the fundamental frequency of the open pipe is 300 Hz, what is the fundamental freysw9d*6d:y q equency 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+h ajikhu1;u2c,r4c (s axfv: each 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 be moved so an observer in front ohsuhiu,x :raa c;+2(jv1k fc4 f 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 driven by tw/mp 2o +ff5fmm 4ip6che 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 fo24pm+mm6f/5 i pf cwthe person to the other 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 beat frequencysf,)u7tamk,je+-ajh0 m u4f s ,yyo1s?

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; foui d0/nv/s to tune the frequency of a musical instrument. If the tuner hears a beat frequency of 2 Hz, what is the//;fi0 d nuosv 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 twon31jsks;; iod horns are 6 m and 7 m respectively. What beat frequency is heard when the horns are sounded on a day when the ve sk1ido 3jsn;;locity 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 orgtoc y,g9 r87275xypjtybfx 2chestra are found to produce a bea95 72bxty8yj2f otp,y g7 xcrgt 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 a stat;nr33wtdld9hj5(fwnb3j(g fl gng6 :ionary 1000-Hz sound source at twice the speed of sound. The observer heafj(w6:lgnwnddh t533f;lj 3g(9rg bn rs 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 0/g5/;aqtgnwch 3nox stationary observer at one-half the spch no/n53g/xwgt0 ;qaeed 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 la43 y 4kazchy 2,2r7tp3;-sv d qgmkoiistener moves with a speed of 30 m/s away from the source, what is the frequency heard by the observer? (The sounsky37tc,rd4 paa y4 gmqi;hz2k-3o v2d 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 80yqm26u4psn 9w-j yu 3qm6 1rsk0-Hz 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 o2yrqs 3jp9w6mu4uk16ns- y qmbserver 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 healc9u+n2nthne h 7.rapnm*u/ 1rd by a stationary observer when a train approaches with a speed of 30 m/s. The freq2 hnu/nnc u 9nlemrth p1*a+.7uency 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 120 km/h. The train blowko0j00 (eci7hcgijfp q /o7 6xs its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency do yo(/xip07 g 7ijeooc6hcf0kj q0u 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 l0y1 m,tveaf 4n(q/be train blows its 400-Hz whistle. ly ft4en,m(vba 1/qe0Take 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 lmrkau )jl1a52/ isng);t8 x aits 400-Hz whistle. Take the speed of sound to be 340 m/s. Whmsgt/k2 j a1iular) ;x)n58laat 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. x 1b.vyx+hpxbu-/af4 It blows its whistle, and you hear a tone of 400 Hz. Take the speed of sound x 4v.pux 1-b bfhay/x+to be 340 m/s. What is the actual 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. A4ldnt4: e/c)d z(vefgssume the speed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is moving away v4cn gzede/):l ( f4dtfrom 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 hoqeh 7j qqd7g nl*l( ;*nlimd9.rn 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 traidlq*;el( 7q*ih 9dgnjqn7 ml .n 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 ktl zhx4gc/khuo+k3 t ;f: z49is sent out, and a 42-kHz signal is returned. Assume the speed of soh/x3h t +t9zl4k;fuzkocgk :4und 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 th h-jrxq ,t7i9qe conical shock wave 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. What is the half-angle ofnvm) j ,mkys1(iix( o*u81.qz yt k:hl the conical shock w mt.qk(ml)xj1 8uyo:hi zn1,* vi kys(ave formed?

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
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 num0p()t1tvfj /3l orj5df e qi8tber of 1.05 where vt5 3p(/o dr01fifejj)q8ttlthe air temperature 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, 2024-10-3 11:19 , Processed in 0.445872 second(s), 195 queries , Redis On.