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 i)asym. f tkt;,v7fv. /7yr xfis a 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 conducted fastest tht+5j:oq27olxoj l lyi48 2jwh m f2p3zrough

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 ste/st/ c.aab,w;s wis0w ve e);nel 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 increases, what happens to ..h/rvu4 hgiohlf(:vyn:xc 1the velocity of sound? (Assume tha:l/ixuh.1h.vh( ny vrfgc :o4t 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 wultju +kxz7 cis c+9;ru+,p(Hz sound, the velocity of a 200 Hz sound through; sxcp+r9u+k i wlcjt,u z+u7( 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 wavelength of i wogb ,-vc+drf :1sfamw8 z /.r72osia 200 Hz sound in airbr s/z7oo -i + i82sf .g:r,cdvfwamw1 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 arh f( t-/2ei+7*ouni qgd+ezyse 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 wit9(jsb4xle1jaeinl8 de w3*m *h 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 source is emitting waves uniformly in all directions. If y/ :f6 3comt0mcw 4ohmbk 8xv+you move to a point twice as far away from thf/mt4 vw yc8+o c0:km3hxmo6 be 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 waves, intensity is proportionqy.t jc0ne:d940sbdil nx 3,cal 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 )d:co/ 4bw gjuis the intensity at a distance 2d from tj4bgc:/ odwu )he 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 distanckmdq135dl qj p+nd ff84/xue ,e from a sound source that is radiating equally in all directions. What happens8f fq u/ ldkex p+5d3jd,m4q1n to 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 t1 8uz6o89tp , wipxlkis radiating equally in all directions. What happens to6,tw8 z8uk to1xpp9li 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 increaseszha+/nwfn6x 3 k.zbs- 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 8opa4 yjwrow 9 tmrh963un )*qcharacteristic of tht9p y)*jonwoa4hm3uqw9 8r r6e 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 "loudn ts s y3,6 3moffzs2s*hgbp.18sv +jvjess" 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 "pitch" of a musicb4 5iojmce 6(co/3grral 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 airvzemz ts3*5.f 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 displacera lvy)vu1j( 0ment 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 wave generated by ti;.q w/toda,7o5eag2e 2dg yixep7,n he guitar as a result of this vibration. What do .,o gg/y7x de7q 2ae;5 pot2ia nde,withese 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 b:1vyw sl(5lkj oth 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 lengr f( cp hqu ,a1 mf9bynlu,e(.os31sk7th L. What are the wavelengths of the three lowest tones prodo7afpl(3,usk c qn,m 9rye(1sub.1hfuced 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 intc9s47yc aiw7 an open pipe of length L is 200 Hz. Which one of the following frequencies will not resonate sciw77cy 9t4a 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 its fundamenta0ti u-7 4qg/h)hxp8m9v ingb pl frequency. Which statement is correc)mhgx h8q/0gnv p-t p94 ui7bit?

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 at4mx6(qm qk ..u0mvnajp4p 5vi 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 leng 4ag.ieks lb9xso9 .a7th L. What are the wavelengths of the three lowestiss4 o la97.x k9eagb. tones 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 of length L piqq)p.s vh+nk2e 6a,hg .y.nis 200 Hz. Which of the following frequencies will not resonate in nphnqap. gy6he). ki2s ,+v.q 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 resonatf qxq( vlaazu 6f )ybz7r-,8*ping at its fundamental frequency. Which statement is co7 xv6*lff a-q,zzbq(p8)r a yurrect?

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 thi wovhejy0x22sm+n82j x ,;gq e same source. Each speaker produces a toxqx 8sg 2h vw0nijme,2y;+2 jone with a frequency 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, the tw o4j:xp3v0otoi/lt9to 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 be 1r. b5ohhg1ymat frequency is heard. What happens to the beat frequency if the frequency of one of the tones is increag15ro .1hbmyh sed?

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 explaiqy182v sbfm)0g*jtg0 r:djvd ns

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 stationcq0l; 9 )ozpfgqsb8,wary observer. The frequency heard by the obserp)qg 9lqw8z 0s,fo b;cver 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. T m1 hqhqi(*d,.. )6 twtggbyjwhe frequency heard by the observer i jm *) qwdbhy,.. hitg(q6gw1ts

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 i i4m5bsz3 l5g,,1 hyck)q bmhto double its MACH-speed, its half-angle will decrease by a factor ofm blzig,4m q531y i s,5khbc)h:

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 v6ms)qk0 ko5c 45 kHz in air is 352 m/s. What is the air qsc5o60m) kvktemperature?

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 thetel vazt97i1 k(xgil)1zv(49 jp9f um speed of sound in air at $0 \; ^{\circ}C$ 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 34041 e k fchgmhy4bm2es-)7gm7 k m/s, a bat emits a shriek whose echo reaches it 0.0250 s later. How 4) semm-eh7 g 7fk124yckm hgbfar 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,q n0ygo,sb7 de6rqc2 d2 rv9(n 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 enb6tq1 . .q1qy doq9ga flash of lightning, the distance to the lightning strike is a1od1 .69qenqbt qy.gqbout

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 7t:ucx s9ue3zjveq*y n.i/;i 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 w*wqk +ejhvj 7ug s(,x5 vxpbs;/ g-.iiell and hear the splash 2.5 s later. How deep is the well? (Ignore air resistance, and assume the velocig p 7;*k(5h.+g -v jixvbjw sixsq/ue,ty 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 waven aq*7nef :x1iqqzt*/5sy*m t of frequency 500 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 a3 bd :yxlbhhq,; vu1ra9 e,tfbo*imc0 87rae+ t $23 \; ^{\circ}C$ 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 inten px b,dpm+ xg)4ziv2e afrn-,+sity $10^{-3} \; W/m^{2}$?

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 intensitqj8 g;u6it l/ly of 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 svucf 6mjl )/ptllq/*) ounds with intensity levels of 70 dB and 40 /)*l/fql)tv ul cm6jpdB?

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 th51m7rmh/10g d t xo+p5wknoy9 x6u pwxe intensity level generated by one m79g mu0+d5ht15xpnx/wprk yxwo6o1 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 di 3cb xdi8j5 ) 0.e/bzkdtctt0nstance of 6.0 m from a source that is radiating equally in all directions isn03x .zt t)i bdtcb0c8/jk5ed
$6.0 \times 10^{-10} \; W/m^{2}$. 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 distaexxq5 h(9(mp/xu d, mfnce of 6.0 m from a source that is radiating equally in all directm xhx(mp 5 qxduf,9e/(ions 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 mWdx/ )rcw7k:le of power, which is assumed to be uniformly distributed in :k e 7l)/cxwdrall directions. What is 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 at a distance 5.00 m from hlavwvqkb6ia (n s/z ;p 28:6ra barking dog. What would be the intensity level if two identical dogs very close to each other asalp2qba/(hvi w; v66:nrk8 z re 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 gv/.dc),vc-bl wa.b dintensity level is 60 dB. What is the intensity level (in dB) at a point 2.0 m from the sourcdwcg.bv)/,c a.- d vble? 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. At whs ivx8j3:ixmpwv p s4kgtc0uo:6c9 ++at distance will it b :+tcspwgxv8 0 s+ :iu6vk39j xcmpi4oe 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 a complex tone has a frequp+y2znd+ ecvzma* h6/ency of 1200 Hz. What is the frequency ofe*n/ 2vm zay6cdp++hz 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. 00vupp+ 0dvx.dtg )0ymaeq 8pWhat is the length .qap80pt0yp0+m d0xd g)evvuof 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. Whaz k .u6pyohee3,9gd* x4n.mad hm,p:wt is the frequam3g.e,d ppu eodz 94 mh.k*y n:6,xwhency of the 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 ofn*ncb jpr2 l8nb7 .sr14ew2p x61camg 0.80 m. If the velocity of sound in air is 340 m/s, what is the frequency of the second harmonn.wccr 1b 2*ejxsl rp82pn6m41a 7bngic?

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 ik/)/;emat kr9m 9m:niuhekn;n a room where 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 freqh3 j+qthisk8 .uency in a pipe closed at one end is 330 Hz. What is the frequency of the third harmoni8 qs+.3h kijthc?

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 the sh 2azp4m1 37 mfx(hmwtbz7ji.q ortest pipe closed on one end that will have a fundamental frequency of 60 Hz on a day when the velocity of sobz2m.1a w7z7 m ptj(ihm3xqf4und 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 rj2rcqxfqoz 5n *c,6j- y m()szoom 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 temperaturep,zw9rhzgh j pe2d(e *l(:vra* v;u8l 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 length 0.75.be t yrw1g-f, m is played when the speed of sound in air is 3ger-f.w ty,1 b40 m/s. What is the 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 on yn;-s/ +ne1dmpqa8ayone end. If the fundamental frequency of the open pipe is 300 Hz, what is the fundamental frequencyaa; n nq+/1myyp8d se- of the closed 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
67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two adjacent sources each emit a frequency lzd 1uubwt3k3+y s21e w.q2rt 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 of the sourc+zt2q313l kerwdt1yu u2s. wbes 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 side and drivenj4an8 .erlwyaw2bxi .poo kr f-,6tq 3j8:d w3 by the same frequency of 500 Hz. If the distance fromq kw-by6nwplo jjx .t.:reow83 2d 84iaraf3, 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 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 H: wkmq(l0 ztwdw; 599/fc cwmxz 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 the9ru74clw k00)xv ecs pey(5ci frequency of a musical instrument. If the tuner hears a beat frequency of 2 Hz, what is the frequency of the instrument?e c9c5p 00 icv)7rlex(ukw4 sy

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 producotd 7*/kn- fuged by two horns are 6 m and 7 m respectively. What beat frequency is heard when the horns are sounded on a day when the velocity of - d*g7ktfuo/nsound 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 orchestqfy2a z( s5kn -- z/hx4pko6fjra are found to produce -xy( 2 -zk/n q6 4zpsj5akoffha beat 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 stationary 1000-Hz sound sou: o-j05ni6ruwtp 5e9 e8u mroxrce at twice the speed of sound. The observer heamnw95xu58 o r:-o6 rjeuiet0 prs a 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 (normactoe0d8ppt +g;lw)pb h+pmy 78c.aa 9l frequency of 1000 Hz) approaches a stationary observer at one-half the speed of sound. The observer hears a frequency 8pptem 9 aghbc p;y 7a8cl+0)dow.p+tof

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 wcw vrs2+*ty,u :5cb akith a speed of 30 m/s away from the source, wct bv5 u+ywks a:r,*c2hat is the 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 zg+- (ganv*a shl2n8b at 35 m/s on 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 frequen*h(n-gsa +nvlabg8 z2cy 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 stationary4kii) ywgb 2k1,bdxw wu95;oi observer when a train approaches with a speed of 30 m/s. ,bg)iybw ;i59i wukox dw2k41The frequency 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 trxe9s8hg)jlj9 8 e6 :opjao ko2ain blows its 400-Hz whistle. Take the speed of sound to2 klj9xa pj8:h eeg6j9o8o)s o 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 12/:w;d7arx rkn*ieez bc g0 g590 km/h toward a stationary train. The train blows its 400-Hz whistle. 0c*engk 5e zr;gwadxri/ 7b:9Take 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 its 4bf mro,einnuya:9,rcz;f40p5 5+u1 ounm 7 ip00-Hz whistle. Take the speed of sound to be 340 m/s. Wm ,:ou,i f5z9n7ap i0rn ;1mfpneyub 4rc+uo5hat 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. o390q6jz (wju ziy)jm*su,mt It blows its whistle, and you hear a tone of 400 Hz. Take the speed of sound to be 340 m/s. What is the actu(wz6 0 jj tim9*suu3j)mzyoq,al 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/a+lvt 6e/p kveed of sound in air is 340 m/s. What is the frequency heard by an6tev/+a p /vkl observer 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 is+eqf0j lcvvj2w /xj6dd-2h0l 340 m/s. What is t ljexf20l0jvj6c2-d+dq hv w/he frequency heard by an observer if the observer 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 determine the speed of an obbm9i *:gpar7 *.nei fvject. A 40-kHz signal is sent out, and a 42-kHz signal is returned. Assume the speed of sound is 345 m/s. How fasmfebn:* igi.79ap v*r t 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 the conical shock wave produced by a su4dhab1vl om* 6/h6hludy92xq(lh (je personic 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 )i+i* uy/.+zbe a2ys 80suts pxcwr9 jthe half-angle of the conical shock wave formy/ uu p.8i+2jws +sb) i9z*y0rcea stxed?

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 g tmf4-pz 6;lsflies from the United States to Europe with a Mach number of 1.05 where thp6z4tm;l gfs- e 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, 2025-4-12 10:09 , Processed in 0.501518 second(s), 195 queries , Redis On.