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 fals 4xca1bw,lpr 2e 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 t o,tcrgo3ra0 4hrough

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 ofy kx5qa1l)l4h sound 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 t0ta b*(3nfgvqo the velocity of sound? (Assume that all other factors ba0*3q ftv (gnremain 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 up1rw iuqe)*s o1ka2vj /z u96sound, the velocity of a 200 Hz sound through air i *zu2ku )u6/vji aqp9o1esr 1ws

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 n(580j ee ztmva 400 Hz sound, the wavelength of a 200 Hz sound in an5ve0mz e8t (jir 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 20,000m1ub2v 2ro y(sy(g7sw4 hjcl4 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 u4g jut(46 td /cy)wj/u9-k x.heikzcthan 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 al7ak(b)i,cj xnl directions. If you move to a point twice as far away from the source, the frequency of the sound will bec7 baj )kin,(x

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 waves, intensity is proportkr( jzrv; h0q8 0;hg9gz qid*ug7 z/hvional 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 yiyw* th ih*p2 uot07r pf330hat a distance d from the source is I. What is the inten *w0fh o3h7yyuip3 2 i0trt*phsity 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 is radiating equally in all aim (ehaf3wex37- wtw8:ub s.dire:em8w(u 3 wsiw-fxaah7t 3b e.ctions. What happens 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 thh/ h h9 xs qcl n91hj(v0rnync70uib02at is radiating equally in all directions. What happens to the intensity level of the shhn9x uyi2nhn09rs0ch/q (c17 vblj0ound? 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 increases as a sound becomes loud))ipniws*ibr0.c ca . 72 gncber?

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 chaixv v 7*v/dl/nc2l rc4racteristic of the sound increas4 rcvv/ldx 7/ c2li*vnes?

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 "loudnesshdz b0kx1o( 4z" 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 "pitwcs2 k 8vo2o;ech" of a 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 wa0-pkxq7v5 wlt ter

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
19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Pressure and displacemw+9*uem x +x(auh;g yn vp1zh9ent 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 wavy *vq7 9kkjrvv2kxyhh zo5+4*5eom.ve generated by the guitar as a result of this vibration. What do theq5r k.mj9kyz5 vh7+*hko 2oxv y e*vv4se 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 bor8 8 jf2m0r ajsz0x2uj0v yp8jth 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 lokom 67vq x 50p2ncjnn* gepe6p4c.k;owest tones produced by this pp2q veoke6 mx0 g6;c nknj4p pn*7c5o.ipe?

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 Hz. Which one o0 l w+2-lpuopyf the following frequencies will not r+ 2w0plu oylp-esonate 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 L6if z+)(fdtjz is resonating at its fundamental frequency. Which statementj) ziz+tf( f6d 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 djtpom2)z 23jjhin59 one end 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 84ni rd(g)uu8(f ar. mq0fr*hc(p jymlength L. What are the wavelengths of the three lowest tones produced c*rqa p8j urfr4(i8.(nmyg) (um0fdhby 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 ld4(64zdyg+y mn2-hc3z - bcar fkn9yhength L is 200 Hz. Which of the following frequencies -y36mzdngy b(cdk zy nh 4-2ca+4rf9hwill 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 atz5b uq *ev(j,+nrr(n2/iao ff its fundamental frequency. ir5n((oz r2jv f na,feu/q +*b Which statement 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 two speakers driven by the sam 5 qr7+ho2c.le+ gorkbv2ay9 je source. Each speaker produces a tonb5v2hre 7 2 +l arykj.qcg+oo9e 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.wy( ; lm1ta;y esq4on, the two sound waves should have

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
31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two pure tones are sounded vwcm o1-vz+a 6 u/tph.together and a particular beat frequency is heard. Whamw.u+ -/a16zcvto vhpt happens 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 ex3 d4wodf0kb 0aplains

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. 60 l nb0k6sxg xzm-j;o:ogs.c The frequency heard by the observer im bl g6oxjs0z o0csn:6xg;.k-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
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.reb7cysz k+ 01 The frequency heard by the observer ieb7 r 1+kyczs0s

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-sp*u kk)9vty p22 9 :p)rqoldpsgeed, its half-angle will decrease by a fac*pr 2gvqyp)sld2o:) k9ptuk9 tor 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 in air is 352 m/s. What ztwg1 4jdd2vi22d ve7isit 1dz v27gjvw de22d4 the air temperature?

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 rd m4./9yi.i x vli.3xcqkkv1 -7rgg iof 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 340 m/s, a bat emil+a))nu 0;i(oz9* wog qjbw iyts a shriek whose echo reaches it 0.0250 s later. How far away was the object thata g i;+oy ib9 *uwn0q)zl(wj)o 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 he +b8b-kg rv gkf;asrwv-,az)+ar 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:f elci6f2a-m3 wq04 .j hxhnn of lightning, the distance to the li0la 6mn hien4q3w :j.x2-c fhfghtning 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 clik;gngthb + -cy,/v7 mhff on a day 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 dr3s v ryaw6(qca hf0h1 y4f1)splash 2.5 s later. How deep is the well? (Ignore air resistance, and assume the velocity of 06 a 1 dwfhr4ycha)ysq1(r3fvsound 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 sogr32wd9/gk)k+mqio j und 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 ai0.m+yg yv2qqduc t. m(r 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 l9bhci-)wj7uj 1cgd9oh k-h wa1ver: 8evel 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-d+ wb/( c w7fl)wblw u*))w2h-heoidsrB 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 inten9n paeww 0ym-b,9bc h; fa5o*bsities of two sounds with intensity levels of 70 dB and 40 dBw w0 ne9hyaa5b,bp*9c- bfo;m?

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 ih4ytbc :0e;p 9ek6ful2t a2y as the intensity level generat9y k0eec6p2ay4f u tb;:htl2aed 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 source y5*h* cj0lac( c.pqc ztogjjy5p*u3. that is radiating equally in all directions isc .ht ujcgp** (cay3.pyqo55 cjl *0zj
$6.0 \times 10^{-10} \; W/m^{2}$. 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 fromiiz: b0lm b9b7 a source that is radiating equally in zb ii79: bb0lmall directions 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 deliveouuzk n1n(xh /;tr* h.rs about 1 mW of power, which is assumed to be uniformly distributed in k.z u1(/h;tnrnuoh*xall 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 s )ji h+4a-d8bmkb4(xnl +qzaa barking dog. What would be the intensity level if two identical dogs very clxbqhim+4 z8(a +)ka-s4dln b jose 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 intensitya5scq4vp:: il level is 60 dB. What is the intensity level (in dB) at a point 2.0 m from the source? Assume that the source radiates equc: ivaqp5ls:4ally 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.m8z 0c7kvhe( i At what distance will it v8(70keicmh zbe 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 120(r 507pzm)e1 v wo/ qz*kq j8bcrkdn8y0 Hz. What is the frequency of thee 8ymw81r qnp7qk(c)5 kd*vrzj/b 0 oz 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 harmpakfmu 3b v.mf 3x bu8x7l1z/ 6s3xx-ponic of an open pipe is 900 Hz. What is the length of 6x3lm m7pfvfbz-/1kxpusxb ux 3 8a.3 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 resonatevac4(t6jfn c6 a,ts s) in an open pipe of length L is 400 Hz. What is the frequency of the lowest tone that will resonate in an open pipe of lengt (,46v6sf atja ncc)sth 2L?

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
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 lengt545rn yelm6rs4rw w -zh of 0.80 m. If the velocity of sound in air is 340 m/s, what is the freqmr rr54-lyws6znw e 54uency 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 temperature61zh :l,kvsjfd po3u 5ar7u-u 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 frequend* cl)l,p(hch wn( 0ijcy in a pipe closed at one end is 330 Hz. What is the frequency of the third harmoniwc cp )*nlid0(j,hh(lc?

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 wsxm1s*tp+ 2i7x-ig f jill have a fundamental frequency of 60 Hz on a day when the velocitgxf2 im7s pt-1js*x+iy 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 where the temperaturiz6 pwxo )-(fgjh j 50bbd),xae is $20 \; ^{\circ}C$. What is the fundamental frequency 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
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 5qx86d oyp i*u b4b1kj$20 \; ^{\circ}C$. 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 zo1 ok3w -x(y:cocf27tph+ ck0.75 m is played when the speed of sound in air is 34pwt1fcy o x7kcz-o+:h koc(23 0 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 a78ih q g78jjhgf4cca)nd the other is closed on one end. If 8g7hq4i7 cg j ac8jhf)the fundamental frequency 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 vrjd(m*e bpi/mdw2h4 07r(sv j87nhc frequency of 800 Hz in air where the velocity of sound is 340 m/s. How much farther bv7d20vndrhh8wpcme(j(b7j 4/ ir sm *ack would source 1 have to 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 plai/hof)v ive m0sd 5.c)ced side by side and driven 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 sound, w)f ms. vcvioehd) 50i/hich 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. yns,j1;nd2aj9i(r x o sotq yh8(. 4ug 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 frequency of a musiw 1z q voa6r42; a6nt8mhsf6bycal instrument. If to28h4zy bwf6vmq a art;616nshe tuner hears a beat frequency 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 hor 9ey y6ex3dk*6ufb cf:qbs:w-ns are 6 m and 7 m respectively. What beat frequency is heard when the horns are sounded on a day when the velocity of sound is 340 m/*:e6k-6be df9b xu3qs:fyywcs?

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
72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The corresponding violin strings on tw7;lv* jcmj w 5r4ft(ajo violins in an orchestra are found to produce a beat frequency of 2 Hz when a frequency of 660 * 4jw r(jfjm7v ;tal5cHz 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-H7p zgkcrn..u ayl(t(6z sound source at twice the speed of sound. The observer hears a fr .lg.7yprn(tuc6 za(kequency 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 (normal frequency of 1000 Hz) approahhs *y/ kf4o;*vtb;yr ches a stationary observer at one-half the speed of sound. The observer hears a frequencyfr /hvh*4*sb;y ty;ko 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. i 2.o rcxw7s(gIf a listener moves with a speed of 30 m/s away from the source, what is the frequency heard by the ob(wsc ioxg. 72rserver? (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 traveling b: yz xit9s8w md.+;)fwihqxhb/mc80at 35 m/s on a day when the speed of smw q b.wd;zxt i8hfcixms:0) yb98/+hound through air is 340 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 train approaches w+do 6fa3 -bvz7c1 hvbsith a speed 1+7b-fhobdsa v3cvz6 of 30 m/s. The frequency of the train horn is 600 Hz and the speed of sound 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 /cpotz0k ) .+n,tra2vpm j dd/km/h. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency dodnojrm0+2katp,// . t )zc dpv 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 statin; f+.-t )s6imd-ygzkohiph3 ycl * t1onary train. The train blows its 400-Hz whistle. Take the speed of sound to beyd ;3*kipsztl+ny t6oc )h 1-hmg f-i. 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 fz7ffp gs m2v35rom you at 120 km/h. The train blows its 400-Hz whistle. Take the speed of zsmf25f pv3g 7sound to be 340 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 away from you at 120 km/h. It blows i9upzrog/) k3 3 j h+qxup8q+cuts whistle, and you hear a tone of 400 Hz. Take the speed of sound to be 340 m/s. What is the actual frequencj 3o+uk+uqhqp pr93xc) ug/8z y 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. A,e3a. o7ntaf26rw zi 8f 0ssvbssume the speed of sound in air is 340 m/s. What is the frequency heard. abr3ns,ov8fi z6s7 0aetfw2 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 soi1qbks6zl x7l2dyogx.6s 0a )und in air is 340 m/s. What is the frequency heard by an observer if the observer is approaching tho.6yal kzds 106l2xxg7isqb)e 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. A 40-kHz sig wp nciqlmk4d;; v9i/9nal is sent out, and a 42-kHz signal is returned. Assume the speed of soun;4klmiwpni 9vcd 9q/;d 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 z z-:5r* pv loqa crq.wj59fu0produced by a supersonic aircraft is $60^{\circ}$. What is the Mach number of the aircraft?

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
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 sf+/;ir g nwaweu1i;p b 9b:l8the conical shock wave fobpi+s g i 1rne/ua:9w bl;f8;wrmed?

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 1g97 hh9p syq:ug5z sgnumber of 1.05 where the air temperaturegyggp1 q h5uh7ss:z99 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, 2024-11-21 22:53 , Processed in 0.477295 second(s), 195 queries , Redis On.