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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

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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 false stat9uv, fj,7yoamement?

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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 conductee);(:ns6hibllkcz2 oebh) *h d fastest 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 soundlg sn-hppt* m)jm 4)o8 in a steel rod?

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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 t pn el f-3gua/f9z1ac1he air increases, what happens to the velocity of sound? (A/193faan1z-pue l fgcssume 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 4 2;( r7m 2jm cyhde (2*vqkezfanhpk2+00 Hz sound, the velocity of a 200 Hz sound through aihn7mcm(jka(2hrd+2y kve2; fe2pq* zr 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 20cwda/oj* -h(wa,ex5 e0 Hz sound ino jw/(xe- ec*d5aw,h a air 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 are cmc ljxz f9,;3xalled

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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 xun si)f o-k/*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 waves uniformly in all o;s4d1sy x. -1ggbp tddirections. If you move to a point twice as far away from the source, the freq 1xpg1d;t - g4ssbody.uency 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 is proporvne-0a 0c(m-k iyb4n wd)*kvwtional 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 distaaxjde(r-)wy 2 nce d from the source is I. What is the intensity at a distance 2d from the sourceerdwjax)y-2 ( ?

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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 tha l8o qtuv6r7g330ctfp k7j+rlz0l3 zrv njx*:t is radiating equally in all directions. What happens to the intenno3*rrzrg lkvlj0: ft zlx6cjvu+p78qt 30 73sity of the sound? 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 souugm4kz5j 4m 1 3 1enu7qaz9mmprce that is radiating equally in all directions. What happens to the intensity level of the sound? It drops pm4ju zzmaeqk1 457mmn u g319by

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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 m5gde,p m 9ai)/v)vicbecomes 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 speaker emitting a pure tf 1/;8j kktarsone. What characteristic of the sound incrjs1atk k/;f8 reases?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines "loudness" cps3 ahkcfr 3b1(a):mof 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 tnoi v)e;a79kirk-)t2lsq1*q od, nh musical 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 into d8jk 1asie 27uwater

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Pressure and displacement waves ared .+hpa+ayq72s 0bvm y

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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 generatedhlyh 9 sd;5h-r by the guitar as a result of this vibrati -h;hl59 sdryhon. What do these 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 open at ky ega-e0d(3w 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 of the three lowesabaxn9p+/+ mynuszl x5sjv;0)9 wtx 6x y0p:it tones produced by thin0v9b am :jx65puxsn/it)+l+xzy 0;9y ws paxs 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 open pipe of leng2h,lwo im +tw*-c bv.yth L is 200 Hz. Which one of the foll c.wb y hotm+*-wvi2,lowing 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 fundamentr1lf 4v3/crtn al frequency. Which statem t34nrr1 vc/flent 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 a7(wbxvtt 3,cv4o*ipvlxw/w 5+okz.n nd closed 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. g4hnxd .e:;dgd- ii a/ What are the wavelengths of the three lowest tones produced by this p4hgd:de- xa/;ignd .i ipe?

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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 L is 200 Hz. Wh hhpp pkzp(/m5x2 f02gich of the foll2h0 mp(pfhx g2kz5p/powing frequencies will not resonate in that pipe?

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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 reso a,/j /penpoludb- vlhd9.p /*nating at its fundamental frequency. Which statement is jpl,9 .elhv/ up-d/bp /dn oa*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 speake03rsa.j / dr.snlvzt5 rs driven by the same source. Each speaker produces a tone with a frequency of 200 Hz on a day whes5.n. lrrs 0jd/zt3av n 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?

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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, the two sound waves shouldnd a (w1;,o9dpug/nfm 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 toget r nmi2f 1rwh6m31v5eb1ib/nmher and a particular beat frequency is heard. What happens to the beat frequency ifr5 in1261efnvb1mi m3bm/w r h the frequency of one of the 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 explains, zcuu-f+: ngw

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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. The frequency hea/z w xuwqd3e96rd by the obserdw3u 9/qwe x6zver 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. Th vgc*qv6ihn*bs8z 6 -re frequency heard by the observer iczsg * 8ir6v6qn*hb-vs

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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 wlb jr9v06nrp7 tgu:xe+x) *cbzi6 p4w ill decrease by a factore*0g w+tp) nu xbvx 6:6jrcbr 9z7ilp4 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 in air is 352 m/s. / v2fym6gbjfvui 01*9ns *ikwmv/u.cWhat is the air tempe /k0cbn*f.2 u6 vfi vsmgvm y*9/1ujwirature?

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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 the speed of sound in tb )ir t3g)v:yair 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 340 m/s, a bat emit(+xa( v/bkkh.tn7ft )+ fml ycs a shriek whose e k (blnf)kfmyax/(+7.t+ vth ccho reaches it 0.0250 s later. How far away 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 echo in 6zj/fmcvodv 0ai5h49 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 5.0 s after seeing 8gj2de46i,+cw tj;b p4 zapmc a flash of lightning, the distance to thecgacz+j,w442p6; t8dpi bjem lightning strike is about

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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 sln :4)t vdw28wqu(iyx from 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 y0:(*sfh b qhq2rnh)zand hear the splash 2.5 s later. How deep is the well? (Ignore air resistance, and assume the velocity of sound is 340 m/n*(qqhh2fsy :b 0z hr)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 sound wave of frequency 50 b;af ns;w m4z3p5ll*lkh+qe-0 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 atiq7bmiei4 *obqr /;h7 d;k i4e $23 \; ^{\circ}C$ 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 level of a sound wt ee ayjl8;ue(5m:ux3ith 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 f, fmbxc lhpe)k.45f6l (3mnfof a 70-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 intensities of twox28q1a3 etzi- q+yhy08zpu s x sounds with intensity levels of 70 dB aypy8z8 sztxix210hu-qeq3 + and 40 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 enginej3lym)a+zk9lxf; d,g s in a garage is 100 dB. What is the intensity lzm+3xklfjy 9l ;,)adg evel generated 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 o8401dlzv doy0wk6.fg 8 o qehbf 6.0 m from a source that is radiating equally in all directi8zv0q40od 8 6dol1 .hbekf gwyons 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 sourcncr2ih7v 7lzacm+de/ +xa,h)e that is radiating equally in all directix+h+aecv chz n/mr i)2dl7,7a ons 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 a). 2 sivgpq5pmssumed to be uniformly distributed in all dir5g)2 s vipqm.pections. 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 at a distance 5.00 m from a barking dog. What woulhw1:fe9 : vprtd be tt 19f:w hvp:rehe intensity level if two identical dogs very 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 intensity level is 60 dB. Whaj 53;h ex0x oa5qem km39rddhp( 1olp,t is the intensity level (in dB) at a point 2.0 m from the source? jmap r;mo90 dp(31 5e,5heqxl xkhdo3 Assume that 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/lv zz*gm7c: c what distance will it be 75 dB? lc /m:zz7*vgc

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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 comp.rpold0 ( wk.*u-dtjs lex tone has a frequency of 1200 Hz. What is the frequenctu(.srlk d0.j o pdw*-y of the 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 third harmon q / gf fr;j gb,c+sms1xy+zij:/3ly.eic of an open pipe is 900 Hz. What is the length of tjgs3+yz :ic 1gre/sy.jf ;+x bl,mfq/he 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 resonat,6y*3f tl+aa a.cts vne 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 length 2aty 6lsc3*.tf, vaa +nL?

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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 a length of 0.80 m.se),vg8. lmt 0mhyit9 If the velocity of sound in air is 340 m/s, what is the frequency of the secon )98isyt0 ,vlg .etmhmd harmonic?

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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 where the temperature y2idr(lb e1k d dld+98is $20 \; ^{\circ}C$. 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 closed at s(aqwoa(p t;y 7z 1 e9l0db 1sa*crl0sone end is 330 Hz. What is the frequency of the thir9ydscssq7abpa;10 *wz1 leo( t0(lrad 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 pipg a+/-dmvq3k /5d+dgacg)gjke closed on one end that will have a fundamental frequency of 60 mkd)av- j/++qdg/ggda3c 5gk Hz on a day when the velocity of sound 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 invlov i;n: hzqqo7l2 tk)ir2+ 7 a room where the temperature 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 zd:p bs3l:xh9 room 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 znr/ .oo ):vzw .ryq.clength 0.75 m is played when the speed of sound in air is 340 m/s. Whaozw)..n/o:rvyr . q zct is the fundamental frequency?

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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 is openr ttznq ;e ,v051j2 vhdg5hd.n and the other is closed on one end. If the fundamental frequency of the open pipe is 300 Hz, what is the funh;2,njr dq. v0etdzth 5n5v1gdamental 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 frequency of 800 Hzql sum9u80 v.zxud :: 1zmx2pe in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to be mousu:mmlxu.zv zp:10 e dqx829ved 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 same frequencyzs)rvdxg l5- m*6 ydd8jzdk28 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 3402g-8y zrk m5)jsd*xz 6vd8d ld 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 frequenq; k8yj8f4xsjcies of 440 Hz 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 fork4dzvkp /8vu* r to tune the frequency of a musical instrument. If uk v8v*p dr/4zthe tuner hears a beat 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 produjhq 5vy 845khcced 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 o8 qk j5hyv4h5cf sound is 340 m/s?

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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 violins in an orchestra are fou+itc -up8pjqwb 1(.uhja-q 5r nd to produce a beat frequency of 2 Hzu8h.(- jti+1cpwj-rq5 q pub a 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?

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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 sor3l6 c-.dfy,9hmgdf jurce at twice the speed of sound. The observer hears a fr.c rhm l-yfd9j,3dgf6equency 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(-nc3npa0c:ux,ff o i 1000 Hz) approaches a stationary observer at one-half the speed of sound. The observer hears a frequency o,opfui na( 0 n:cf-3cxf

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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 listener moves with/kx7:t6 3caube7i ne f a speed of 30 m/s away from the source, what is the frequency heard by the observer? (The sound speebe 7ne/:at6ik cx37uf d 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 traveling at 35 m/s on a day when the ugn2w 1kj2;pb speed ofjn w2bpku1;2g sound 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?

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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 observe-l q1/.wdkosun d w54fr when a train approaches with a speed of 30 mw/ d fls w1-k4.q5udno/s. The frequency of the train horn is 600 Hz and the speed of 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 train blows its w85pb5 7 w-l+xxrv(zgtz x zq8400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency do you hear?vlxzz88wxg7qbztw r5xp +- (5

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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 trbprez( 10mpgams t.o t7zcs. .jlvo9)ds1( /yain blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequ(vao.mmzy0egzd)b s1pp(/t 7tosc .19.s rljency 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 1208udel k2,f0xd l fwa,t::am9 v km/h. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. Wha0umf ld:v9e t, fd8 awk:lxa2,t frequency do you 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 blows its w m801rh 9dr9k( db-q9pg)ly g4zhef .qrznb ;ihistle, and you hear a tir lhz1(k .9m9n g zr0bd4qd;byfqrpe89g- h) one of 400 Hz. Take the speed of sound to be 340 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 500 Hz. Assu9q(*z4a; ul, y g:o)xl 3d r9ingoalbnme 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 a speed of 30.0 m/gglal,9nabydu i4; q :*x)zl9noo(r 3s?

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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 sbr,s,cp -ko7n ound in air is 340 m/s. What is the frequency heard by an observer if the observer is approaching the train with a spee,7-o scnb ,pkrd 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. A 40-kHz signal is sent n rh1*0 y5ctnee*sp(x5egiq1 out, and a 42-kHz signal is returned. gi*5 cthne (px e151rne*sy0q Assume the speed of sound is 345 m/s. How fast is the object 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 conicalm .g4kbsjw4ct/i n h(3+1fyen shock wave produced 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 of Mach 1.4. What is the half-angle of l5gq6rpa xr os -(*ubu+ 36yr3fas/uj1n1xjk the conical shock wave formed?u33 a s/x*gq+k snb(xjr165p-uju6rof1y r la

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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 with a Mach numelnb .d- (0;hs5kahicber of 1.05 where t ld(-bk5niahs;. ch 0ehe air temperature is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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