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 s b4 ccp0vejw0 qk++yk4tatement?

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 throuz+ 9aj76rwz5,7p.fvq8xclcfi4eu tu gh

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 gi l2/ 5r+l;,slshzdaa 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 increases, what happens to the velocity kmej+n / .(zo x;jwvd2of sound? (Assume that all other e djz(j o/2vk x;n+.mwfactors 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 pzpn9;qiga+ *of a 400 Hz sound, the velocity of a 200 Hz sound through air pz i *q9gna;p+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 oewn9;rmnb nrpp qg0c9;q(/0 gf a 400 Hz sound, the wavelength of a 200 Hz sound in airgpcbe w;g0nr (0; pq/nrnq99m 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 wit1;v(4 zhg,1h dd rk)pi :olhvzh frequencies 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 than 20 Hz are callfdyms9-h h d pe7j.*)led

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 un14oxgo9.dq+qc d8 s5f8xc ndtiformly in all directions. If you move to a point twice as far away from the source, the frequencc+xdg98o do5 qf t4c1.n sqxd8y 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 pron,zck:n30n dgportional 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 ul-io r 53 iy.ij4mw:kj2s6pf is the wi5 i:p-ru6k3 j.yimo ljf2s4 intensity at a distance 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 that i1qroxz+z1 ca,a 1 r/ats radiating equally in all directions. What happens to the intensity1 /,o1a+ axrzzrca 1tq 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 sour2+r pdbg,i-)bux/7e) iodpqt ce that is radiating equally in all directions. What happut bdx2) p-i,g7irb+o)p dq/e ens 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 following increasy4wmb (gcs7o0w 94 x6r1cpb bxes 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 speakupi:li n/f8iy;o7s4 h er emitting a pure tone. What characteristic of thshu 8/li7 4:o ;ynfiipe 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 "loudneh2tc8 r4 lj6qpss" 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 musicalylf b63 /ib q0yaqv9aq1wdw1(mmde t w: 1hu61 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 airi p0 5/f20tjwnbph -rk 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 displacementr )b7xh9 uw-+hjburu6 ,a4 /sfrszfy p18 2qlc 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 stringppaqo*icgn5 lfq8 + ywt:qn6rd8x: ;2 and the sound wave generated by the guitar as a r: *q8ai:npgx2npq;+q6 c5fwo ydrt 8l esult 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 te:z.ezg ; 2gzboth 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 the three l /qj5bf;ti.e sowest ttjqbe.f ;si/5 ones 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 200 : 1gs2bn nicj26l:bxry8lw*c Hz. Which one of the following frequencies will not resonate in the sam 2cl* 2:xrsnlgj8ynbic b:6w1e 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 fundam/ yz)*t d*3qfq h-f ukmshxwd)d;-j*w ental frequency. Which stath -wz;k)uq/qfjxd -st 3dyw*)h* d*fmement is correct?

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 aq wen1/i ehn fn(3w)v8nd 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 wavelen;rw ci((b2m 7kzdb:aegths of the three lowest tones producm7ad;(r( kbezi cw2b:ed 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 cl tt .y3ng;nn4cosed pipe of length L is 200 Hz. Which of the following frequencies will not reson c3yt;n.nnt4g ate 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 resona +4(u eboe-bouting at its fundamental frequency. Which statement is correct?-u4o(+ee uobb

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 between two speakers driven by fqjfo xsfp5/:a/ 36ulcn eo9+ the same source. Each speaker produces a tone with a frequency of 200 Hz on a day when tfexfu6jofo3/s n9 5+lap: qc/he 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 two sound waves (muqc1 zfw1n2should 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 particularw hdl1 dnr-b:n: jay/) beat frequency is heard. What happe :hda: wryj/n1b-ndl)ns to 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 expla jhq/0ob ,/vq eynz( 3rx7hw2rins

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 st-,g7w0n b 5-pdpqogkchbe- 7qationary observer. The frequency heard by the obseeh 7ckgo bq-d- 5p-7qnbp,gw0rver 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 stationarewj9/ im ygj6vd5h-z;y1wo 8t y observer. The frequency heard by the observw5woz-djvt6 i 8yej1y m;/h g9er 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 wils7/2 fnhe s jh ii7m6*xzc.gq*l decrease by a fx7s*js2g.imczh* 6e7 h/finqactor 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
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 kHzt9n:rd9b(bxh(d z*/ f6pla wh in air is 352 m/s. What is the air tempb:9px(t/b frz9lnhw6(*a hd derature?

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 atns h.u) zlfzce:5j. t5 $0 \; ^{\circ}C$ 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 x*0 x*k dh*blhmr ;zg4emits a shriek whose echo reaches i0dl r;gx4 h*kmb* hxz*t 0.0250 s later. How far away was the object that reflected back the 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
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:xo0 r,phc fa/s w)li*j(nbn ;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 a flash of lightning, the di gsntfqko+9 ai.c)93l( ab f+fstance to the f g)+s.t3ifac+ao9(flkn9 bq 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 cliff on a da2kib g0a 6-.c3zx7ojqm6 amvzy 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. How deep k 1x08p(yj jm ffl11db fsj4,bis the well? (Ignoxjyf10kf 8(lmb f, b1jp4j s1dre air resistance, and assume the velocity of sound 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 sound wave of frequency 500 Hz u jlmoqb/spp:8 6 f1.zis

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 aixoo*k ebg4() or 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 of a sound with i/w on 2bm3vphve dw,k+w7 b*x3ntensity $10^{-3} \; W/m^{2}$?

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-w; lb- kq+/gbqdB 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 intensitie-zpdl 5vwvtspx ;e8x6 mtys u011zm 4.s of two sounds with intensity levels of 70 dB and 4 mx4;u6pzs zty1vp. -v dxems5 t8w0l10 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 100hn5zhv s sow mv./t58n,gtd gc)(n.h0 dB. What is the intensity level generated by o0ht /8 . )vhtms,och. (5ndnwgznsv5gne engine?

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 6e 0lvr1-a 6 lxwif*yk-.0 m from a source that is radiating equally in all d0wx-elria*6-lv 1k yfirections 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 sourc8nvdkr i i+v.es5 qa74e that is radiating equally in all directions ir.4 di7 ens8qvv+k5a 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 of power, whivk()k5/9lx wx5 m 9jxvf+ ygijch is assumed to be uniformly distributed in all directions. What is the i)xj9g v95 +(klxmyw kjv5/xfintensity 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 a bcxxwdsp harn; e10k6brt7m80 9 x9bi,arking dog. What would be the intensity level if two idenbx80 m b0di7hax; ktr wsn19 9xrp6,cetical 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 intensity l4h 5)8lo.xuml1m b ishevel is 60 dB. What is the intensity level (in dB) at a point 2.0 m from the source? Assume 4m8lh5 sluimohb1x).that the source radiates equally in all directions.

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
55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The sound intensity level 5.1px 1krm.w*f c0 m from a point source is 95 dB. At what distance wixp*c .1rmw1 kfll 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 a complex tone has a frequency of 1200 Hz. What is thg n9(7rhffl9;adss 4oe frequency of the fou(;49rfans gf7 s9 ldohrth 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 Hzxcv7sm1 )dfj8. What is the length m1df7sc 8xj)vof 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. *dwg1tadkwu)hv cvq 1s, 65 o5What is the frequency of the lowest tone that will resonate inh1 w)gvuvkd1* 56 t,5 dawocqs 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 at n7sp2 frnqo :fw)5f. length of 0.80 m. If the velocity of sound in air is 340 m/s, what is the frequency of the seconds5fno)ftpwr7: f2 n.q 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 8b.ute yv2k m/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 frequency in a pipe closed at one end is 330 Hl13 dff knyc/3p-zg6yz. What is the frequengf13n6z pyl/yk dc-3fcy 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 have a fundaj 5-6w)ta3 xef avnd5imental frequency of 60 Hz on a day 56e) adnwaf 5x3i j-tvwhen 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 rh:e /(ill3bqroom 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 whrm0db z; z)z- ykj2i0w v -c:qbk;a(qxere the 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 when the s1s 7z h9;jjjhrpeed of sound in air is 340 m/s. What is the fundamental frequency?s ;719jjrhzhj

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: onojasxh6-; rj6 6*yqmd e is open and the other is closed on one end. If the fundamental frqjrsj6a;d-h o6m x y6*equency of the 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 the vd z,b99ghw.dk.3 h fidelocity of sound is 340 m/s. How much farther back would source 1 have to be moved so an observer in f.hd dfdz3g9,.hiw9kbront 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 driven by the same frequenc:z(c k0/ihhp ,rkf:tyy 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 340 m/s: tkpif 0yh:/kr(,hz 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
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 txbts-:z)mn8 .f/smk qhe 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 tn( v,nbc:c.gf aj.4ehuning fork to tune the frequency of a musical instrumen(4jv b gccn.:,fha.n et. If the tuner hears a beat frequency of 2 Hz, what is the 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 two horns are 6 m and 7 m resp.rfvm9 nbn j;bq1z.c2ectively. What beat frequency is heard when the horns are soun j qv nb21r.mzc;bfn9.ded 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 violins in an orches+fi;k4i9 i vvtqn .tnj0 +u7fntra are found to produce a beat frequency of 2 Hz when a frequency of 660 Hz is played. What percentage change +i vkvtft.j;n fq+9 n0ui4i7nin 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 soundzwt/g;uehmz o.w;+ g1 source at twice the speed of sound. The observew. eowg/zg zu1+mht ;;r 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 w( .77in al4)gjw4fpnk uin, a7ds6g kof 1000 Hz) approaches a stationary observer at one-half the speed of sound. The observer hearj. kanwn4 n7i,dk7(4)gfsw laug7i p6 s 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 mo5m7) wdcpkq ;g9 l6:gley+gb dves with a speed of 30 m/s away from the source, what is the frequency heard by the observer? (The sod6lbkd57)gl9:;cw e gg+pqmy und 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 4xkdn 67f3 tlhsiren. It is traveling at 35 m/s on a day when the speed of sound through air is 340 l3d7ntfhxk6 4 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:    
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 trainx qhw:.8tyjwk/44nm+* j gddc approaches with a speed of 30 m/s. The frequency of the train horn is 600 Hz and the speed of sound + 8mgtc4:q kwxjw/ hdyj n*4d.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. Td (6m fv04kkrg6yp3mqvu: +p ,da.mhxhe train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What u06vrv:6.dxmdmp4 h(kg myp f3q+, kafrequency 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 toward a stationary tw+ppo):ccm+ w rain. The train blows its 400-Hz whistle. Take the speed of sound topc m+wc:w)p +o 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 yo,/oyd) )e+e dr;o nmqiu at 120 km/h. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency do you hear?o;moe+n ),di e/r qd)y

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 b0n0oag5 g +olq65fs ryou hear a tone of 400 Hz. Take the speed of sound to be+o0a 5 q5gs 0grol6nbf 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 horn is 500 Hz. Assume the speeeefjhi.xkft ;5d q/1 6d of sound in air is 340 m/s. What is the frequencyd/ e1f.;t6exqfih5jk heard by an 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 apol;zri2*z v-)yw*gu:xaf ) uir is 340 m/s. What is the frequency heard by an observer if the observer is approaching the train with a speed of 30. g*a;x u w: zzliv*)f-pry2u)o0 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 ci2 f8z;:rqaysignal is sent out, and a 42-kHz signal is returned. Assume the speed of sound is 345:zfcq i r2a;y8 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 conical shock wave produced b+ )kb;ji:jux3xfagw 1y 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.ecszo 6.sb+k0wx7yek:ww o nmi.3xk3 lt2 .n) What is the half-angle of the conical shock wave formewo0yz. e.3 .sx) kl+wkm:o67st2ei3 k nxbncwd?

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 Sta+gwxnp y, rm-zn7-)e5bxs q6stes to Europe with a Mach number of 1.05 where the air tempera wr 57e- smqpxg-,nzny6 xs+b)ture 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 11:17 , Processed in 0.441864 second(s), 195 queries , Redis On.