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 statnl)g4r9 to9 ztement?

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
2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In general, sound is conducted fastest thr7 jdmpl4f ph-,nf wza at+/*a0d /ejq/ough

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 soun:b*izp(./ua n, jtklnd 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,w vntbap5l8u tm65; v air increases, what happens to the velocity of sound? (Assume that all other factors remain cb8v a5p ,wt6n t;5luvmonstant.)

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 sound, the velocity of a 200 Hz soun d8 t/e a(69nlqfra*uz5db 0fp+ acob+d through airda6pboq / df+fbzcet8ula 90 r n5a(*+ 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 wavelength w cj2gyep 8d( +bju abu;fo);8of a 200 Hz sound in airc jge ;( yuawfp+bj8dou82b); 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 v9:pa ;9xu0dmxj uy g0*sqo *acalled

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 than 20 Hz av pd+ pf.l drr:*of 6l7a2gjg4re 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 source9)*kf51watg g gsn ex) is emitting waves uniformly in all directions. If you move to a point twice as far away from the source, the frequency of 5xg))fg91st n *gkweathe 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 wavese 1h9uyv e.o;t 1d wdw0ot-no6, 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 poine:. nnjm2ft(y t source at a distance d from the source is I. What is the intensity at a distance 2d fr( fy n2tn.je:mom 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 that is radiatintw0 noj:kiqx0i 5+7 nog equally in all directions. What happens to the intensity of the sound? It rknooi0+jtn:i 0wx7q 5educes 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 distancepx8eyf)(vktz. n x85psdhr/sr f6k( 7 from a sound source that is radiating equally in all directions. W8(8n 5 ephr x 7k s(zv)tx.sk6f/frdyphat 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 3udzqur 0z; z* c:w03wnoktv*y(x:fnng 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 towadj8:jwvm 8,ns rd a speaker emitting a pure tone. What characteristic of ths8w8jd ,n: mvje sound 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 "loudness7yuj;xpxj1ld-g ax;1 " of a 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 tbw ir9 -oo9-*6 fnokkr63kxa 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 air into watesr yik8cg:;q+r

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 displace8 qxf8esxe)t **zj-w uewa a1scf.2x /ment 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 , c43x +s)cwgjy vr5s)w 0onsxwave generated by the guitar as a resx swnwcs4 sv)53 yj0xc+,)rg oult 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 endjl +hmp*./ ursh *c;q ; 7:npctme;fpls, 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 the three2mlhjmgd87d 8 3 p +xe)btun7y lowest tonesg+hjm8d2 l emy )uxn3t b78pd7 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 L is m)cg;g :ox:jm17rif +3owmfd200 Hz. Which one of the following frequencies will not resonate in the:mrd1j :goo7+f 3f)immg;xcw 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 its 8/ oy bdj:,khtfundamental frequency. Which statement is corret/h,k:by 8 jdoct?

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
25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a resonating pipe which is open (7(+jy wk1rq*aru2van2aiy u at one end and closed at the other, there

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
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 tlmiuyq,th 7m kuryls1-.1 )d,he three lowest tones produced by this 1ut,)yqdk.rimmu, yl-lh1 7 spipe?

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 closem)2z2 x))x 3 r-jbkoerqydo2ud pipe of length L is 200 Hz. Which of the following frequencies will not resonate in that))o -mr xx3kd2ojer2zby ) q2u 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 it5r w i ,gag9nzic.rg66s fundamental frequency. Which statement is cor6rgac 5g,igr .i6zw9n rect?

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 the same snb2yzy,if 7 ms4 pm31wource. Each speaker produces a tone with a frequency of 200 Hz on a day when th ,nfys 7mpz4w2ib1 m3ye 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, t+95u x 327x1i(gesi +czjdkbnwea lu6 he 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 tffu2b gx 4.7belsp;tge9d m59ogether and a particular beat frequency is heard. What happens tougd9pf m2lexe gb.;s7 5 t4fb9 the beat frequency if the frequency of 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 explains+uoe b(unaj20lij71 v

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 statio;z9fstd 8b 0v2r z0uh k7rm7fdnary observer. The frequency heard by the obs8uzhmrk9r ;z0bvd 0t72ffd 7s erver 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 stationary observer. The frequency hea k7nh0:sbw47r4w nfecu1v-g 4dml0n r rd by the obs 17k chs4d4r m l40bf0nwrw7-:nv ugenerver 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/sa,q4p8c i1uh.l mrx will decrease by a factor ofus4qp .,i1lch/ m a8xr:

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
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 iscm,w7hb 4cllwza2+;y 352 m/s. What is the air temperatumblcz7hc+, w yl;24ware?

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 speq acw jrg18;t*7 1.kszajkgf0ed of sound 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 of sound in air is 340 m/s, a bat emik) 3al0ge e4 *unhij5gts a shriek whose echo reaches it 0.0250 s later. How far away was the object that reflected back the soungg3ne5*ie l 0)ujkh4ad?

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 temperature iscu)oa )uzou76 $0 \; ^{\circ}C$. 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 nwbeb1l ,i)2-n0 lb kqafter seeing a flash of lightning, the distance to the lightning strike ieb1 0ikln b,wqb )2-lns 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 cliffo ujwday apa6807rq.( 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 later7i/1np)ossy x. How deep is o)/iyx p7ss1 nthe 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 frequency 500 Hz ip1c 1 e* wnv07jv*lscrs

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 aix dwdf2ovx 1,f3t6/mh+6ikd jr 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:    
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
46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the intensity leaidnh/6-pfmd0k5 kypr sf(4/vel of 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 70-dB souzs0+eh ua0 ha:nd?

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 widgt2 i:;belf0 th intensity levels of 70 dB and 40 dB? tb;f: dl02eig

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
49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The intensity level by 15 engines *a 2ggs .x1- izybtzl(in a garage is 100 dB. What is the intensity level generbzg.*tgy i(s2xlz- a1ated 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 so;9 sj kehjpa1to(2fsu(::so p urce that is radiating equally in al19sft2uhspjk ( os:o;a :pe(jl 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 from a sf 2a-:lrue)s jource that is radiating equally in all directions is j-r2eu ):fasl
$6.0 \times 10^{-10} \; W/m^{2}$. 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* ** jhehg,rco of power, which is assumed to be uniformly distributed in all directions. What is the intensity level at a distance ,hco*r*hg * je5.00 m from the dog?

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
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 dya a/ a9*1rmkb( m4xceistance 5.00 m from a barking dog. What would be the intensity level if two identical dogs very close tbaa/*k yrc mxm(a41e9o 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 intensity level is 60 *l)lxp 0v; hkrdB. What is the intensity le l rvkx0)*l;hpvel (in dB) 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 point source istus u 8(8nofc w h3jol ad9vsx33uftoc6:-)0e 95 dB. At what distance wisf3 e u8nho(fl)vo wxtsa3d830-jt96uu:o cc ll it be 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 ama5 bp hgu f/-lbo vh*,fd8*s( nm3ewt07ozt8 complex tone has a frequency of 1200 Hz. What is the frequency of the fourth harmonig tpwh 0slm*3n8fho5ua-b vdbf*o8 (7, / mtezc?

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 Hhoyrd,/ya; 5h z. What is the lengt,;yyho ha /rd5h 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 resonate in an o hcs6j37 r/ + +sjdrpttuvff27pen pipe of length L is 400 Hz. What is the frequency of the lowest tone that wdputt3 hj2 6 r/f++7 vssjc7frill 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 velocity of*rf,3mnlc8w i( )b1kaah wr.f sound in .i,bn1 crfk)fwm8r *l ( h3aawair is 340 m/s, 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 room where the temperature i ue630fs7r aw, xq-trjs $20 \; ^{\circ}C$. 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 Hz. What is t1x*)4gxz:lv t km dlno( 8vy5-isbd7f he frebn l)ok *t-m4lx:zsd (vx1gd87 yv5 ifquency 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 closed on one end that will hav 5(3g/ekh2jpm7mfm 8 o5yepea e a fundamental frequency of 60 Hz on a day when the velocity of sound is 340emfho( 53ee pg2aj7pk8m / my5 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.j;rz,yu5osul z m6: i 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 ofkim8:.; mu7diyfgfq i ,5f($20 \; ^{\circ}C$. 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 o9)x9qz( 80wxikf o2qz2do ub gf sound in air is 340 m/s. What is theg2 qwfo9k ( bzd89u ix0zqo)x2 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 samec2yoihxd q ,6; length: one is open and the other is closed on one end. If the fundamental frequency of x;6 2yc, diohqthe 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 smz,n i74ceis w1m;y) the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved so an observer in front of the sources would hearm,1i;c4)7sien zys m w 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 thp9p vieq9 a lt(thp86d 3awtl6zi29j6e 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 6299p6 tt8 eadp6 t (zpjwili3lv9qhaspeaker? (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 Hhg8(q pqdie *)zt ty ),yqgq2bmy1f.8 z 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 ybow+kj b,o() frequency of a musical instrument. If the tuner hears a beat freque+ )oy obwk,(jbncy 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 sounds produced by two horns are 6 m andyhelc; egiv0 h8 lk2.9 7 m respectively. What beat frequency is heard when the horns are sounded on a dhkg8ely.hl 9 v;0eci2ay 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 oos73zzg5 :uodoj)dp 0 n two violins in an orchestra are found to produce a beat frequency of 2 Hz when a frequency of 660 Hz is played. What percentage change in the tension of one of the sud7z0jgzood) op3s 5:trings 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 tw -;c ;*/dlhn,6cct,ojfbb)k;pci jpwice the speed of sound. The observer hears a ctp-;nd/fkcjlc);p ib ,;* c, h bjow6frequency 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 observer ati tdb+ g3)uy ;7e (v3lob2wfp.b p6kwr one-half the speed of sound. The observer h2).fl v6pu+ oyeb; itb7bk(gdrpw33 w ears 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. Ivzf c *b f,h,f8b/q-zv;,tnegf a listener moves with a speed of 30 m/s away from the source, what is the frequency hearvgc ;,ebn,tfz-8zvf* b/hq f,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 siren. It is traveling at 35 m/s on j9p6tjp62 muy 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 frequency doesu2 pt j66y9jmp 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 lz4-m-v .dq )ad3 znyya 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 soun) mz. -nzdqv y3dy4al-d 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 120pb )hksmqc0 -0 km/h. The train blows its 400-Hz whistle.b0q)-0kpm hcs Take 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 traing*kiuug(o2f 1 . The train blows its 400-Hz whi1u2*f igk u(gostle. 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 120 km/l 4 j-/bko qtd,81fc 4m; ayevzbl6zi*k0e +hsh. The train blows its 400-Hz whistle. Take the speed of sound to be 340 cs*+q6e lv0 b/;y-ojia1tlhzz8kfed4m, b4 k 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 awa8,q/y- hjksvvaro /wy 2tdp)+y from you at 120 km/h. It blows its whistle, and you hear a tone of 400 Hz. Take the speed of sound to be 340 m/so/rs2ha/ ,+py v 8t ywq-kdj)v. 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 horn is 500 Hz. Assume the speed of sound in air i ;1 wtymf*fb6ls 340 m/s. What is the frequency heard by an observer if the observer is moving away from the train with a fbty 6*mw1l f;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 airs+mxx,,,-a 7ygpt zyg is 340 m/s. What is the frequency heard by an observer if the observer i-,a ypgxsz yx,+t7g m,s 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 determine the speen )8eqhg7m ;xpd of an object. A 40-kHz signal is sent out, and a 42-kHz xp78em) qhg; nsignal is returned. Assume the speed of sound is 345 m/s. How 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 conicalm0c 3sr s6rgi(o m,q9d 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 of the conical shoc-:6) 8wsdino bkno2qss s*x9pk wave sx:nsokqspw8 b- o*926 sn d)iformed?

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 t4a yte+9y;h 2rprpxu9 -a3tku o Europe with a Mach number of 1.05 where the air temperatu9tthy+e kapuyxrr4u39a;p- 2re is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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
  • :
    •
    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, 2024-11-24 04:13 , Processed in 0.493678 second(s), 195 queries , Redis On.