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习题练习：Physics Unit12: Sound
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 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 ,y /u -gkb,jqjfalse 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 fastest througxc 5g-pm7e. hjh

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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 stemaj5cr+2xozz ud 5n* 0el 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 the air increases, what happens to the vel zvvo0axn7: 5n9ta -jkocity of sound? (Assume that aj90n7:azxkv ot 5va n-ll 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 velocity of a 200 s5/o cs meik7o7oz5 )vHz sound through aisoosvo7cm 7i5k5) ez/r 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 kaxivw)idp s/;2u(zla (g 5(;w7rxjl400 Hz sound, the wavelength of a 200 Hz sound in 7wz((avxi;kl) ji xsp/2l; dwa(gu5 rair 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 fl2wiu4(0el ) qzii)jbrequencies greater than 20,000 Hz are 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 lessm61h2bje9f4fgh +3lqx +lin e than 20 Hz are 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 sourceub0 d9vt 04afu is emitting waves uniformly in all directions. If you move to a point twice as far away from the source, the frequency of the soun btfvdau u9040d 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 proportional thcgsyr/n,6 d8 o

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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 8xzqg)h6ox.7pa/kh 5r8 b wnb d from the source is I. What is the intensity at a distance 2d from the hx88 h7nb/a6pok5rw g q zbx.)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 8rl1)dzp+ 2ic+( /bcyik yk cssource that is radiating equally in all directions. What happens to the intensity of the sound? It reduces t1 2rikdz(y/p )8kb+lciscy+ co

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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 sq1+c-xl*o yjsc bp1,eei d5 9source that is radiating equally in all directions. What happens to the intensity level of the sound? It95yc-p1+eej sd*1bc xi o ,lqs 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 ira)3hzud.q*a wa sdbhdv,+u z+5 zi. 9ncreases as a sound becomes 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 tone.t,9c bx/koth; What characteristic of the sound k t/9 ;x,tochbincreases?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines "loudness" of a p9c u9/qv7 l k,hl)sfu ue)s(mmusical 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" od;:u+3hom - (wsng5vq4wtw4qbu m o .zf a 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 fromm6a;qo(lv hd9 air into water

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Pressure and displacem 6 no2n9snw)c zuysg/yw.q3. nent waves 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 an8mhgf q2vv,s4/ zrd, guitar string and the sound wave generated by the guitar as a result of this vibration z,ms8v4g,nd/ fvqr2 h. 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 both end 0xrqlo yh9;sa*+y27rq0rx uss, 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 lengtf0.takldu /fxw a9/ 6gh L. What are the wavelengths of the three lowest tones9agw tu0x//.a6f fl dk produced 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 rx,,d3bu yhr,xesonate in an open pipe of length L is 200 Hz. Which one of the following frequencies will noxxr, ,d3uyh, bt 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 re bm:h:l tdg:7jm-d16u3z,jq zbgr u(csonating at its fundamental frequency. Which statement is c3( luq:u7bzgbd:z ,j- h1gmmjdtrc:6 orrect?

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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 c-cn;e m 4e389yhla 9wfh zv;ub7pe.nwhich is open at one end and 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. What are a6hz gnu9z); azz 87, nyi7 ov58xz(ol5mxcluthe wavelengths of the three lowest tones produced by tl867); z9oang z8 yhoc zi5 7lxxz(amnuu,5zvhis pipe?

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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 20oh/ j-1 imufd 4+9ajll0 Hz. Which of the followi+/ a hljjd19l-uim4 fong 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 c;qdlu( nb 72uwy*2on wlosed at one end is resonating at its fundamental frequency. *yqb ;o wnn7uld2u2(w Which 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 speakers driven by the snzw j o w n c,/ojw+ef0stnz3ky8/2/k)ame source. Each speaker produces a tone with a frequency cjns+0fzn n /jo3 y/w)wkwze2k,t/o 8 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?

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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 b3i,k 7 x-yifckeats, the 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 soe1 j ;..c w(qgt uh*)pdzswce+unded together and a particular beat frequency is heard. What happens to the beat frequency if the frequency of one of the tones is inzec ;h)..g sut+w( qwej*dp 1ccreased?

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The Doppler shift explub+xv.-bg rqu-a8ee 0 ains

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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 he ;yv ihlgd55+mard by the obsy h;g5imd 5v+lerver 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 ;ojfku p5-vytcndysc 3-, w.0 observer. The frequency heard by the o0-c;n 3. -wjdyt ysuk,vc5fpobserver 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 tne2u x9 ip eh0i2ev qo)2t8;exo double its MACH-speed, its half-angle will decrease by a factoe n0t82e9u2iv)hpxo2x;q e ier 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 ail .n/i s)4*g j,pbcogrr is 352 m/s. What is the air temperatureolp4/n b)g jc.s*r,gi?

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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 s(p hvm80zl7ltl+p0 ugound 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 imrnq-lp 8yb) z v7s);zn air is 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s later. How far away was the object that m-)78p v slrbz;zq)ny 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 thar s*+b+:nj.gc ylxbdl, h8c1 e echo 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 5.0 s after seeing a fmkesc/s8m 05ag:37tk5d8jsqmlk ba(f ;s k 8clash of lightning, the distance to the lightning s;m ka8se7smk5bs3gd8ts mk0q/ :k5f jc(8a l ctrike 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 s from a cliff on a daw8d zr26 n9a:;f iuxgby 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. 8,o1*tct ts/r) ofxymr3mf,o How deep is the well? (Ignore air o /r8oocrt3 t,mt*f1sxm) yf,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 sound wave of frequency 50 hu3x6r;3;ir hi8tg0a7ccxpc 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 olx 2wt(lr,,a ).r iz3ps2 gw1og 0sanat $23 \; ^{\circ}C$ 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 s7g(ztm st4n 2qound 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 a5wx90)s256yj hzxn2at b xsqg 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 two e0-y2vtxr:9-p4p goh x8*cnla a s2kzsounds with intensity levels of 70 dB and 40vpx4nt gor 9xca h2sak e:y-8z-20lp * 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 enginew8 3fa2ijb- rd,8hr gks in a garage is 100 dB. What is the intensity level generated by2-3 rjdbhgfa k8i,wr 8 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 6.0 m from a source that is radiating equally ina4*ju sb4h4nqvlc ni2 o -r3aj*gb5*f all d ljc32iaab-54nhb *fo* 4 u njrqv4g*sirections 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 radi74zm3j yhx .kfating equally in mfx hk .37yz4jall directions 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 o(kz( udvjid,x0n r(6mv sw5+mW of power, which is assumed to be uniformly distributed in all directions. What is the intensity level at a distance m,6z o0(w dujsx(5ivr+dnv(k5.00 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 nr:,e;u1d d1qga g9mel *of) 7zidq0g5.00 m from a barking dog. What would be the intensity level if q1l7 nefdu:m0;,rq eg*1)9d igaog z dtwo 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 s bp 12nr)z3nc r)mr rvqna:+x61( lhqiource the intensity level is 60 dB. What is the intensity level (in dB) at a point 2.0 m from thel:p3q1rh2 rx)qri)ra+ nzbn(m6nvc 1 source? 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 what distance6,sd8hz0 mo jeb skuxb9y pbyo+*/-.v will it be 75 d9zvssdx8,- 6yh .k*/ mpe uobb+y 0jboB?

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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 frequeny9+f(8xx// x g, 3vb2ls2nbi. xefntygfh3 m ncy of 1200 Hz. What is the frequencyi 2yxlnhm/ fsev.nfx32yf gx3+9nx 8,b/bt( g 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 harmonic b fu)3de 8 egsf9ew)u*of an open pipe is 900 Hz. What is the length of the p)w9d)ues 8f3 eu*f egbipe?

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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 open pipe of length L is 400 Hz. What is the . z ny,c4ri y7q6vnrw7*w/ 4nvauuc m3frequency of the lowest tone that c*w/4,w7.46 vn3mqu v7i nnayczryr uwill 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 a length of 0.80 m. If the vw4f ltr+w ::k(ubs r7aelocity of sound in air is 340 m/s, what is the4+wrrw( a:u:tl s7bkf frequency of the second 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 gx2yi+g;q w)hsl0leq9/ 3dv-v 7lcau 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 ia:0c4pof hd x7f7h. cmn a pipe closed at one end is 330 Hz. What is the frequency of the third harf dh0cc.x4hma 7: f7pomonic?

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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 pipe closed oz1w581gyi snn n one end that will have a fundamental frequency of 60 Hz on a day when the velos 1g wynn1i5z8city 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 ix4e:u d2gltxkn( w 90ys in 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 room where the temperaturt8jjg gz35k/3l hwp3r e 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 mps+(3kki8z6ktc mlcx 9ml c6) is played when the speed of sound in air is 340 ( skx )6ml+miclccpzt683kk 9m/s. What 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 0r4b dt4;tzmois open and the other is closed on one end. If the fundamental frequency of the ope tmr;tbz4do04 n 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 frequengf fue8+8j( xi5k8kx*c duuf6 cy of 800 Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved so an iff *uek x8+8uu8x cfd k5g(6jobserver 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 andrw9z-)ub2psrpk8( zw 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, which of the following is a po)purwzw z8 2-r9b(k spssible 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 and 444 Hz. What is the beat frequ e3t24 1xfkkhry11ub cency?

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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 t 5imbjm3 cfwi x1x7r -5ukz750ofzu 0muning fork to tune the frequency of a musical instrument. If the tuner hears a beat frequency of 2 Hz, what is the frequency of the instrument?ou3x7k7f r0z w-cxmz1u0f5 im5mjb5i

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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 prod:lsq6rl sice 5 xp5 0mxjf-),gv*,x iduced by two horns are 6 m and 7 m respectively. What beat frequency is heard when the horns are sounded on a day wh:-r0fpx5c ,d sgli6xxlv*j qm5 es)i,en the velocity of 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 v)fhcodjx 900c57k(k uxxb un(iolins 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 (xc7kd9 )houu fcxb0kj n(05 xwould 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 stationary5:es zw;r3fh q 1000-Hz sound source at twice the speed of sound. The observerzsr: w3fqh;5 e hears 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 stqech-tl7s 9x26lfxu h 6hxx*(ationary observer at one-half the speed of so*qtec xx f-6lx 9hx67hshul( 2und. The observer 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 1000xnk2)9ctle+ z7cr3 o n Hz. If a listener moves with a speed of 30 m/s away from the source, what is the frequency hea72c3ro )cenxt9zn+ kl rd 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 qsp3u*ghh2wfna. + z.m glev8+ cl.i1traveling at 35 m/s on a day when the speed of sound through air is 340 m/s. The car approaches and passes an observer who is standing along the roadside. What change of frequency z2g .n*vc+mu. 8w ql1hle.s3p+gai fh 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 observer wh0x1r1xyhkgm ;en a train approaches with a speed of 30 m/s. The freq1g;hrxx1y 0kmuency 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 x 8m7+kdkgau7 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 hm7 da+g kxu7k8ear?

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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 t c,ek9rp;b*e uoward a stationary train. The train blows its 400-Hz whistle. Take the speed of sour 9keec;*pu,bnd 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 youh /otq x3calq 85bo:7nhmfl:6 at 120 km/h. The train blows its 400-Hz whistle. 7bnch o8lm6x3qt: hqofl/a 5: Take the speed of sound to be 340 m/s. What 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 zaz4 v 6ft8)6pu dwm4qits whistle, and you hear a tone of 400 Hz. Take the speed of sound to be 340 m/s. What is the actual fr4dzz48vtmp6uqw af )6 equency 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. Assume the speed ag s0syui gm27c:+7gr of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is moving away from the trainsg0 2rsim7y:ug+ g7a c 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 soundzj2 l+lp *ub*l in air is 340 m/s. What is the frequency heard by an observer if the observer is approaching the train with a speed of 30.0 m/p * *zl+ujbl2ls?

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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. insf za-w(s6i r 8vm gn.:/)ax A 40-kHz signal is sent out, g:)mxia6 v nwas8 (rn-iz.sf/ and a 42-kHz signal is returned. 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 th m;nfh66ekw s0e conical 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-anglehxta8z y ta tj2l(5vyw0.)- tt of the conical shock wave 5yatw.jyth82)z-tttv(0l ax 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 U6v evt)a5pyijlcau()9 o c f5.nited States to Europe with a Mach number of 1.05 where the air temperaturtv uf clp .)y)ace9vjoai(556e is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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