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 stabsf,i097vfeh:bw, urtement?

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 c2 ,az1whvnw.lrysc s o /629laonducted 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 sou5b otswrm d95uvqva)crbq:q- g88ov i( -3m ,xnd in a steel rod?

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
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 of sounr4iy ;/6jpl gmh (ys*sd? (Assume that ar( hp*li 6s ;ygs4myj/ll 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 Hz sound, the velocity of a 200 Hz soyg0yoj8 ))ef6c5msn-2gc sqeund through airqocn0 ye sfs)2m6g-85je)cyg 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 wavelengz9v k dyzo*(y,th of a 200 Hz sound in airkoz, dy9yv*z( 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 gredg*7eunw v-n 7(l1 schater 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.b5r-rl za+rf 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 directdll0.l9u pvfv4s +h)b gnc- *yions. If you move to a point twice as far away from the source, the frequencyvlvlyh*pd +bg) -4 f.ls c0un9 of the sound will be

参考答案:    
标记此题
10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For spherically diverging c ddnv6iq;r 9oqp30 flj813zs waves, intensity is proportional to

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
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 distance5nu fhy wmb-is-f+d 8c,(jpy3 d from the source is I. What is the intensity at a distance 2d fro8 fu,fjsy- mcpi -nhyd 5+3(wbm 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 distance from a sound source that is radiaxz;fd7g- e l twp;klpow0f(m 5/i*x7iting equally in all directions. What happens zt; fxkxw(*i7fg- 05i/pw 7m ;epllo dto the intensity of the sound? It reduces to

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
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 eq9b7rukizy5h- 2,t1fy v. rpnbually in all directions. What happens to the intensity level of the sound? It drops zyfbn1i-v2.bk9r7 5yup ,trhby

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 ascec9 h7x o:ob n r.7by3.mrsg3 a sound becomes louder?

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
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 tos)7:s(ysbdprsqpx1ps 3m 0 a-ne. What characteristic of the sound inps s)13 x7d(app0:-ssysbrmqcreases?

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" oxm8cnq4 d6 og6e: i0kmf 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 wd+5q n6b8qon 7ap1fe+q 7cfa (i2d mia 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
18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When sound passes from aif/vc (f b;a(t:ekobx *r 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 ar (bzekr3gh08 re

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 s0x2,iyf+yb 4ehy l8g5e8i enttring and the sound wave generated by the gui t2hy+5,g48f yn0xe 8iie byletar as a 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 which t6u1567jacyw oshro8 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 wavei9 aw17f mj+*yj ro3talg4k h vw:2,xnlengths of the three lowest tones produced by th lj r9n*am4 o:7i3tyk+ w2 jxafgwv,h1is 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
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 Hz/9dl5 3q;kwsaqzp)ri. Which one of the following frequencies will not resonrq93 ai sl dz)kp5/;qwate 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 fundamental frequebo0k mf+-lelb 6i 5-4i,:hbfaugz:v xncy. Which statemen-,i f0kb x6+5zl:fg- ubvmhlbio e a4:t 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 and closed at the other, thea z;u 8qzt)1pq.9dlq)trxb(m 40p amqre

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 wavelengths of the three lochk8zvh2h9d5c1 x np1west tones producedhzc vp1h nkc h9dx2815 by this 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
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. Which ofye2bk+)z;:zp8s zuj y the follz 8 ep;+:zsu yz2by)kjowing 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 enu m1 eqsoc/qo)70.hhc5b z3bfd is resonating at its fundamental frequency. Which statement is o.5ecbf3 m7b0u 1hco/ s)qhzqcorrect?

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 source. Each speavxk* 2 o1hno-) 0zi8(4rdgkfk n oqmx9ker produces a tone with a frequen o2zqk(4fi8)x9rog v-mnx*n k10khdo cy 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 two sound waves tnkxzuimw19yu xb /1n:,9cfk, 5a1d qshould 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 beat frequency is heard. 8l0t2fp6vq;l m58omi 1lx yiq What happens to the beat frequency if the frequency of one of the tones is incre2;8omil80tlifmyqq x l 6 1p5vased?

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 explain*+i2un.c0mugv rvr x2s

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 observer. The frequency hmdv2*u. hnuo*f2:7 le vudy ;ueard by the observluv 7n.y;dduh2:v u2 *m ueof*er 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 jlxylx2 .g:.8k so)lkrd by the observl ys .)xo:.8gx kkl2ljer 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 will decrease b id +bap cg7uz po/1el(+i1(icy a 1pbgzp1(c+i(c+/o il 7ueia dfactor 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 kHz icjh/fb bz o g6sk,bmeh;,*6)n n air is 352 m/s. What is the air temperatusm/en)*j,gb, ho kbc; zhb66f re?

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 s(c9t;u ,6dft39s7z4k al3*8f zv n atqxtqqtoound 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 9b jsigx/b+q wp)-xh0 q 4auw)sound in air is 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s later.h0-)i /sqgb px jq+ a9xwub)4w How far 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, andjbx cp3td)17zy1yjj qzt/hak 6 0jr1: hear the 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 5.0 s after seeing a flash of lightning, the disct)nrq1wzzui tt+ , 8f.xn 3:htance to the lightning strike i:iw.zqfz1h,) x8t rtc3t+n nus 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 da,yz*a8 8uhil0 sw/ u,v e.pywxy the temperature is $15 \; ^{\circ}C$. Approximately how far is the cliff from the observer?

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
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 and hear the splash 2.5 s later. How d ar/ndiq8 94a -et,wyheep is the well? (Ignore air heaq- 8r9,4/yiatd nwresistance, 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 sf 6lbwsr+)gwls,9om 9hw y9d gw*y*ekh6l;5q ound wave of frequency 500 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 aira6dzm8r6h /:bv+m a uj 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 intensiov5.gvrn7 q+) mz zeh)ty $10^{-3} \; W/m^{2}$?

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 70-1wyu*zi:tt3g 3-yfs ydB 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 ini.-q :co59zn o9cb ogptensities of two sounds with intensity levels of 70 dB and 4o:9 oo9z5cqn-gcpi .b 0 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 engie 8-.vsct* (itg dq1pmnes in a garage is 100 dB. What is the intensity level generated by one(.i*q-tm1 tcs8gepv d 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 pr d v*,a cdb ,2e75nkga2nq*lfrom a source that is radiating equally in all directiv ld 5c7qb ed2,g *ar*npan2k,ons 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 ofu/ c:akr*p5 fk 6.0 m from a source that is radiating equally in all direckc:u5r a/f *kptions is
$6.0 \times 10^{-10} \; W/m^{2}$. What is the intensity level in 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
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 k(,o j+febg:d icz0ohb;. :kv- h(ltnis assumed to be uniformly distributed in all directions. What is the ing:z + vo,.n(-tdh0kb;e( bikcfjlo h:tensity 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 hk1t0fe5) hijl 1b4lga distance 5.00 m from a barking dog. What would be the intensity level if two identical dogs very close to eac14) left hhkij1gb5 0lh 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 intensity levelyvb 4/srcc5gh1* 8qvt is 60 dB. What is the intensity level (in dB) at a point 2.0 m from the source? Assume that the source ra8v*b5tsc r4 h/qvy 1gcdiates 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 5.0 m from a point source is 95 dB. e6 9spv2m5yiohx my8c ehn x+45t)5gi At what distance wi h+e x8g5vy4i tnemimop6xs29)y5h 5cll 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. 7i)k0m t05 ft*n rmz7q ipjyr ;+bg,yt What is the fr7i zb )fm;,05 gjiy t7q0rrtpktmy+n*equency of 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 u1iwt, n*drngeqr 9itlw(pq 6 n*u-9 :pipe is 900 Hz. What is the lengtu*ew-9qn(il,t wp9d*1r6:i qn trnug h of the 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
58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The lowest tone to reson0zkdw(n ja/o:ht r dkmuj-;:wa, 58 ztate in an open pipe of length L is 400 Hz. What is the frequency of the lowest tone that kat/dn0-oj;tw : (:a, 5muwrdzk8h jz 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.,2w g1jcl zkww-kx /ln+ b4r;z80 m. If the velocity of sound in air is 340 m/s, what is the frequency of the second;jbwr-cnwg z, l +4 z2/kkx1wl 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 temper8r;qsg gx nwdz5/1v ;xature 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 Hz. What is the ftaq hr8g.o:e- vuth( 0requency of the third harmon-r0 h8qgteo :(hv.t auic?

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 pic ,4fv50, v1zpo)9v f5zy fpgj 9tlgegpe closed on one end that will have a fundamental f4t j1cfg),950po9y zepvgfv f ,vlz5 grequency of 60 Hz 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 roomj 1z *wy /+ra8rm,s*1merwyygx kc/t2 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 itvf6frh -zz6 .6bvd 3gn a room where 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 len9 wilzqwy h:o t7(l*lt0p a8z)gth 0.75 m is played when the speed of sound in air is 340 m/s. What is the fundamental ( qlz9t0lwtzwl)y *: h8aop i7frequency?

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 i+qv)vwo-us 8+*puliq /e s nz3s open and the other is closed on one end. If the fundamental frequency of the open pipe is 300 Hz, what is the fundamental frequency of the c8*iwu solqs/ -p3+v+vez) nuqlosed 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 of 800 Hz in air where the fc2,vzb5lzk- (c n 3 umv.svrt5s:s- uvelocity of sound is 340 m/s. How much farther back would source 1 have lc , z3-k.vn mvv2:z5 f(-bsr c5tususto be moved so an observer in front 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 dq0z1z axa-c.6ke qct7riven 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 c 6zx0- 7k1.tqczq aaesound, 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 Hz and 444 Hz. What is the lvv 8)6s l3yusxbj84cbeat 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 frequency of a musica ao: ;nt6pj3muynwf/4l instrument. If the tuner hears a beat frequency of 2 Hz, wj3o nw; yfa4:nu6/tm phat 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 byz nc)lk96ih o*:la wk; two horns are 6 m and 7 m respectively. What beat freqza )nk;:9hwol6lci* kuency is heard when the horns are sounded 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 u1oso2f+u+ mv 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 strings would bring theom o 1v+2us+ufm 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 3 /fhwp+fnp8l7wxhe) stationary 1000-Hz sound source at twice the speed of sound. The obsp8fwl+p/hfeh37 xw)n erver 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 obsiru,zxl6+i-(1fu+ ) v fuqypjerver at one-haxi-+( pufu vr u,+1ly 6zfq)jilf the speed of sound. The observer hears 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
75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A sound has a frequencjr ;8 5i lmq:)ltwoo,by of 1000 Hz. If a listener moves with a speed of 30 m/s away from the source, what is the frequency heard by the observer? ib ) q:l r,lmowt8o5;j (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
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 tra*wb,b s j-(mozveling at 35 m/s on a day when the speed of sound through air is 340 m/s. The car approaches and p- sojmzw(bb,* asses an observer 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 heard by a stationadezewog ;p97gg(zr m,. p-;kpry 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 sound g7dozgwz 9r;e.pgpp e (k-,m;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 blows its 400-Hz o9 r z**,p5t vjx8imya75hoib,coi m, whistle. Take the speed of sound to be 340 m/s. What fr*5 rixta b,95, oo8,zioyjpm i7m hcv*equency 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 tr /cnmp 4,ap/tt 0z6kzoain. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What f0azp k /tt/ 6cz4,mnoprequency 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 traveling3pqkg hr(;kf. away from you 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 (pkq; rg.f h3khear?

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 b(m hnig5q5/ mdlows its whistle, and you hear a tone of 400 Hz. Take the speed ogmh/qdm5i (5nf sound 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 m1 l iplwnm ba)c0i519is 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 moving away from the train with i 1ml 0i9w1n5bplca )ma 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 horn is 500 Hz. Assume mo* k.:1poarrd kd-c3+8owt d the speed of sound in air is 340 m/s. What is the frequency heard by an observer i3k1-p+8tkw m*odaorr ddo:. cf 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 object. 71mvtdz)kkr )r+ jb: n A 40-kHz signal is sent out, and a 42-kHz signal is returned. r)kvbk rmj +z1d tn7): 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 conical shock wave produced by a superzx --b; qh,gebsonic 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 tho 107kvs7 mraze conical shock wavokmaz vr7071 se formed?

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 n p/k9zmy2lia)k u /ek6umber of 1.05 whe u/9 6i2lkzkeypma/ )kre the 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 11:21 , Processed in 0.426909 second(s), 195 queries , Redis On.