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习题练习：Physics Unit12: Sound
本习题练习试卷来源于51fly国际课程 (https://51fly.win)， 为试卷打印版，您也可以在网站平台(https://autoconfig.51fly.win/)直接 访问本试卷的在线电子版并查看正确答案与解析，搜藏保存任意题目到收藏集。 访问方法: 平台首页左上角"通过试卷号快速访问"输入试卷号 70，并点击直达试卷；或浏览器地址栏内直接输入本试卷链接 https://autoconfig.51fly.win/test70.html  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。
 作者: physics  发布日期: 2022-09-26 09:56    总分: 87分  得分: _____________

答题人: 游客未登录  开始时间: 22年08月07日 09:59  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following is a fdnij 6(r vp+.mqsu 6n. rj*dm:alse statement?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In general, sound is conducted fap1g9bl9l qc*w 8.weu tstest through

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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 steel rod?i;ct6 ex1w8srme0l 0pu( ;fhn

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As the temperature of thglvdq l 76b;s3e air increases, what happens to the velocity of sound? (Assumsb 3l76gdvlq ;e that all other factors remain constant.)

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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 veleya0phewdb.* g cm0w-.8(bwaocity of a 200 Hz sound throu0-a( .8wypb mgh0w.c ae*dbewgh air is

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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 a 200 Hz sour vhkrqf4 01l5ex/skp*/ w (bynd in lp5kw s r 4xyhf1*/0bve( r/qkair is

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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 arn 6v2thj4hb k*vxp k8 itb(7c+zp o+2be called

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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 :9 dy2*s eih jccyflns 34b9j;called

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Suppose that a sound source is emitting wavex -7zzx5h d: pyfe4fl-s uniformly in all directions. If you move to a pofe:dx7f 45zl z- x-phyint twice as far away from the source, the frequency of the sound will be

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For spherically diverging waves, intensity isjmou(51)fttqfyak bq6+ flfued( 6)+ proportional to

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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 frxhezgt42u, o 0om the source is I. What is the intensit0eoz2,g t4hux y at a distance 2d from the source?

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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 r0jez39sge- b dadiating equally in all directions. What happens to the intensity of the sound?-9esb3d zg0 ej It reduces to

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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 isqkob-4a0u 4p u-2cawn radiating equally in all directions. What happens to the intacn-2 q-wuu4pa0b k o4ensity level of the sound? It drops by

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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 be p0 d;rb.1ajpccomes louder?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You move slowly toward a lp6-7/k fdudvspeaker emitting a pure tone. What characteristic of the sound increa7v/-ld6df kupses?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines "loudnmzple 3x hy:*wl*dl9, gh(tek; fo41zess" of a musical note?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines the "pitch" of a musicap nhbw8j5i;b 7l note?

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When sound passes from air intoq+/q4l qf :n5f sd67jr6aorw d water

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Pressure and displacement wdzu us,b);27kh(fp5uw pq* okqjs8 ;d ,gp* apaves are

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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 t43djp+ g jx owa +jx;,ooy:,irhe guitar as a result of this vibration. What do tgix o43oopjd+ : wy,+a ,;jjrxhese two waves have in common?

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a resonating pipe which is *rsxxk -3qr lcs)c(7f open at both ends, there

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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 ofla;,m v uq(snpt0+*u v.ybu(g the three lowest tones prou(u; sgm,v.(*ty+qavp l0 ubn duced by this pipe?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The lowest tone to resonate in an opjm18 4iro v:zsen pipe of length L is 200 Hz. Which one of t 4mvzjis8:ro1 he following frequencies will not resonate in the same pipe?

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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 fn;0y kyq +lo5lundamental frequency. Which stat y5 yol0;lk+nqement is correct?

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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(s y;as/d,v26oq8 owjuboxal t(6 h)q at the other, there

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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 x 0pt5f5+ 1nmbjiq+ zqwavelengths of the three lowest tones produced by this pm1q tn0x+ jb5+iz5p qfipe?

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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 Lwp- 8vu 2 c8q)zu72vqqxrj nh* is 200 Hz. Which of the following frequencies will not resonate in that -qhr*un 8wqxq7 jc28z )vp 2vupipe?

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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 its fund g1+hxc;pn t6xamental frequency. Whicp6;xncg th+ 1xh statement is correct?

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A person stands between two speat i.g1ll9s)eukers driven by the same source. Each speaker produces a tone with a frequency of 200 Hz on a day when the speulg si1e.9l )ted 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?

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In order to produce beats, thet-b *h mw,*gcw two sound waves should have

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two pure tones are sounded togei y8q3oa jm9k0ther and a particular beat frequency is heard. What happens to the beat frequency if the frequency of one of the0mijao89 qk3 y tones is increased?

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The Doppler shift explaikyc czh tz)b,8t(*7rzol,n1 b0 hke 8wns

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A sound source approaches a stationary observer. T- yve mw56mr1k( oyyt2he frequency heard by the obs m(e5yot6 wyk-rm2vy1erver is

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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* vjz,qy huev42hc2 y: y-c7ez heard by the observ7 22j-:ecyhyc*u 4, eq yzzhvver is

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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 decre 3;ki5gne*dc ease by a fagkd e*3c; 5einctor of:

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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 inj3j b/o* rg;n)le/p sn air is 352 m/s. What is the air temperatnbp)nls3gr e/*j /o; jure?

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the ratio of th/hmv ;wfk;v5c.vymxr ypxu2 9n-7 m j-e speed of sound in air at $0 \; ^{\circ}C$ to the speed at $100 \; ^{\circ}C$?

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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 3cd;j0qe- yj 6o40 m/s, a bat emits a shriek whose echo reaches it 0.0250 s later. How far awa-jdcjy;o0q e 6y was the object that reflected back the sound?

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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 echornbl(x4*x g a8 in 4.00 s. The temperature is $0 \; ^{\circ}C$. How far away is the cliff?

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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If you hear thunder 5o qa-- - hdq0apf0fi8d.0 s after seeing a flash of lightning, the distance to the lightning strike is abouiddq0f-h aq--op8a f0t

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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An echo is heard 2.0 s fros:1w b,gz4ahl 4 rupdz:*8gxim a cliff on a day the temperature is $15 \; ^{\circ}C$. Approximately how far is the cliff from the observer?

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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?

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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 ra e:g q:beb+6/wb 2a3xmor.ddeep is the well? (Ignorb+3amo:wdqe ebrxg a:. br/62e air resistance, and assume the velocity of sound is 340 m/s.)

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The wavelength in air of a souny*teess w 037kp*t cefq.g8-k d wave of frequency 500 Hz is

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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Sound traveling in air atdh81r3x/+m kyxkyx b+ $23 \; ^{\circ}C$ 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.

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the intensity lev(rhrg/ip k2ertjv4 (5el of a sound with intensity $10^{-3} \; W/m^{2}$?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the intensity of a /0xl2orrj j)2 hfhuom0. dj/y70-dB sound?

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the ratio of the ,r 4zc(7ktt/ miu2cqa intensities of two sounds with intensity levels of 70 dB and z,/mu7q ac (4 t2crkit40 dB?

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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 g;cx;gnv t2o r;arage is 100 dB. What is the intensity level ge ;;gocntvx;2rnerated by one engine?

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The intensity at a distance of 6.0xsd,l b8as0).s q :i3t 9blgstf:lsy2 m from a source that is radiating equally in all ds0fby) t::9l. 8bs, diga3 ltssl2qxsirections is
$6.0 \times 10^{-10} \; W/m^{2}$. What is the power emitted by the source?

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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 source that is radiating equallypd*- ix s ;m6fsky4vzgj/+,h uwalfg5z1ls4 8 in all disdps- 8zfg zv5hmgxjlkls6i wa 4,/uy ;1f4*+rections is
$6.0 \times 10^{-10} \; W/m^{2}$. What is the intensity level in dB?

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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 is assumed to b4*i8lbj gs onhf9 ld7ck/33 gke uniformly distributed n cb/i4g ljf3l97*8ksgok 3hd in all directions. What is the intensity level at a distance 5.00 m from the dog?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The intensity level is 65 dB aky 9uq7 1ipgx ,-reaj5t a distance 5.00 m from a barking dog. What would be the intensity level if two identical dogs 1 g5xyuaq-i 7je,krp9very close to each other are barking?

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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 inten5m/. 8-ar0m ytg .nli3dzqeiu sity level is 60 dB. What is the intensity level (in dB) at a point 2.0 m from the source? Assume thatra-58gt.0d y .umm qn/i ei3zl the source radiates equally in all directions.

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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 what dista(pb4))4) vr: z bh bdjriryhb0nce will it ))b0hb(zh 4p): irbvrrj4ybdbe 75 dB?

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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 the fa (vg 5n3jt6cfrequency of tta(j3v gn56f che fourth harmonic?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The frequency of the th:h( .bpse4m5e7j vqt urv nz8*ird harmonic of an open pipe is 900 Hz. What is the lengtn8b:juqp*rs4.e ( em z 7vh5vth of the pipe?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The lowest tone to resonate in an ope(d m8a+cez5x : 1uevxvn pipe of length L is 400 Hz. What is the frequency of the c e ax81m5ed+v:xzuv(lowest tone that will resonate in an open pipe of length 2L?

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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 5zy4abnf5dg( a length of 0.80 m. If the velocity of sound in air is 340 m/s, what is the frequency of the second harmon n5 d5(zfab4ygic?

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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 whero: x2ev4. eg2imj 2gbre the temperature is $20 \; ^{\circ}C$. What is the fundamental
frequency if the pipe is open at both ends?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The fundamental frequency in a pipe closedgwl8bic+5x01p jt 5 epxcb5( j -d8uuc at one end is 330 Hz. What is the frequeu i l( jgex5cu1 5b0x-dc+5pw8jb pt8cncy of the third harmonic?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the length of the shortest wz t5z*x-r *w3gpr/j:9cld tr pipe closed on one end that will have a fundamental frequency of 60 Hz on a day when the velocity of sounzrpw j*9/*zdwct-r:r3t5glx d is 340 m/s?

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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 temvyap au jlre +wn1 wp+818u;4aperature is $20 \; ^{\circ}C$. What is the fundamental frequency if the pipe is closed at one end?

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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 roogx jp7d4yfj pee ;l(+1tc8u /em where the temperature is $20 \; ^{\circ}C$. What is the frequency of the second harmonic if the pipe is closed at one end?

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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 whj7kax)jg f d*kc+8p:p en the speed of sound in air is 340 m/s. What is the fundamental frequed8k*pfk7 )xc: g+jjpa ncy?

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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 iso (mqsico c984 open and the other is closed on one end. I9os4(mi cq8c of the fundamental frequency of the open pipe is 300 Hz, what is the fundamental frequency of the closed pipe?

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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two adjacent sources each emit a fbjrs7i kqhv.8s )00fnrequency of 800 Hz in air where the velocity of sound is 340 m)s 0s.bq7rijkh fn v08/s. How much farther back would source 1 have to be moved so an observer in front of the sources would hear no sound?

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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 sameh246nz+24xcpzje k yh frequency of 500 Hz. If the distance from a person to one speaker +46 n h2cey4xhjz 2pkzis 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.)

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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two tunes have frequencies of 440 Hz yi h2./4zroet)wn*u u and 444 Hz. What is the beat frequency?

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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 wrci rnr1 t. s 1gqvp ku)w1jcg/z(6bt8:6/eomusical instrument. If the tuner hears a bea ek6:c iot 18)u6c 1rrgqwps./j/z tnbrg1(vwt frequency of 2 Hz, what is the frequency of the instrument?

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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The wavelengths of the sounds/;9 +zb809dkr v o a*kqdqegvm produced 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 sound is 340 m/s mge /v0z+qa 9k*v;qd bdko8r9?

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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The corresponding violin strings on two gvy(o zpvz ho :n9x.31violins in an orchestra are found to produce a beat frequency of 2 Hz when a frequency of 660.(vx3o o:z1nyhgp z9v Hz is played. What percentage change in the tension of one of the strings would bring them to the same frequency?

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73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An observer approaches spwb -bpuzp,h 3m/v.r h),wb0 a stationary 1000-Hz sound source at twice the speed of sound. The observer hearu)bh b/ pvw .rzs0pw ,,bmp3-hs a frequency of

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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 y.,3/nhov n9v n+nxauat one-half the speed of sound. The observn n+ n39vohxy,./uvna er hears a frequency of

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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 d5o*uda ; 8+ nq1i .na czs63e*lcuttxlistener moves with a speed of 30 m/s away from the source, what is the freode;*uitnntq l63 a5.c8acx z1 d+s*uquency heard by the observer? (The sound speed is 340 m/s.)

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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 travelig:)a6-i)kks*z d m62 wq kcxocng at 35 m/s on a day when the speed of sound through air is 340 m/s. The carqm 62 gsi:c)-kdc6wa)xkzok* approaches and passes an observer who is standing along the roadside. What change of frequency does the observer hear?

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77#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the frequench.fjgrg9gy zb7:c8-v)ttb f .y heard by a 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 o9t ftbbzf)cyr7g: .gg- vh. j8f sound is 340 m/s.

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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 hve2tc 9-or(a6w5tjg. gi*b q train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequeng*e.jgtcr( vh it2b9-5wa oq 6cy do you hear?

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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 train. The train blows i kwxr:f,,e q*vts 400-Hz whistlwe r:*,qfk,x ve. Take the speed of sound to be 340 m/s. What frequency do you hear?

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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 blo- puop (mzb-f s0wp3 xx5cd;2zws its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency do yo-xmfsd2 wx0(zpzc -3 5p opub;u hear?

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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 mcl6b0:3l 9wru lzf0mi1 8pay blows its whistle, and you hear a tone of 400 Hz. Take the speed of sound to be 340yurl8 pcmz09lwfa0 b 63l 1im: m/s. What is the actual frequency of the whistle?

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82#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The frequency of a train horn is 50yu s(rqbw vcd/ 9wy sx;-4k)fl1crq040 Hz. Assume the speed of sound in air is 340 m/s. Whas vuw kd0y-(qcrqrcbx f1/)4sl w; 94yt is the frequency heard by an observer if the observer is moving away from the train with a speed of 30.0 m/s?

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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-0ieu6 e*v utx sound in air is 340 m/s. What is the frequenx vuee-*ti6 u0cy heard by an observer if the observer is approaching the train with a speed of 30.0 m/s?

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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. /eadjq . (f )id,1cix.hi ,vrt A 40-kHz signal is sent out, and a 42-kHz signal is returned. Assume the speed of sound is 345 m/s. How fast is the objec it1x (af),e j/div r,ihq..dct moving?

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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 6k)v1)l orxgy2wv *hf by a supersonic aircraft is $60^{\circ}$. What is the Mach number of the aircraft?

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86#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A jet flies at a speed of9oneyveu .qhxk/ )85j Mach 1.4. What is the half-angle of the conical shock uhoxq9.e5/ k8)nv jyewave formed?

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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 wiry/ 3m )sdcg.tth a Mach number of 1.05 wherc/ys 3grt.d)me the air temperature is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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