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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 false stateml,e hd)n3u55 oao rp0rent?

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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 favxi /xpwo)0 /)lxx.1kl. v-:s--f appo ur vuvstest 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 snm jwu5los2 :t w3.ic4ound 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 the air increases, whahdptr:t+4suo5u8n r3o c (u2xt happens to the velocity of sound? (Assume th rnu+rt 2 x:4up53ud(coho st8at 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 velocitm6 91mn,)f z ,izfcumdy of a 200 Hz sound throuz91z)u m, cm fi6mdn,fgh 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 yi b40va hv 6wqh45 2av/yz2tsr7 pt;iHz sound, the wavelength of a 200 Hz sound iywavs vp42/t yv ;0i7ht hq62i4zb5arn 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 cau;e w6(nhxl**(ms(y f/gomk elled

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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 bv* sct+ ,djp8than 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 source is emitting waves uniformly in(m4vzmg1zq pb7t/6) )byyarj r ,n6m b all directions. If you move to a point twice as far away from the sourc 6gy7n( /t zmrbm),rzb ba)j6qy41pmve, 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, dd dw(ul/z c8cqj03(h intensity is 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 sourcwp)f2yu k *r8re at a distance d from the source is I. What is the intensity kr) *8urf wy2pat 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 radi wy424wy,top yp5qqp33c*uy sating equally in all directions. What happens to the intensity of the sound? It py34 u 4q 5syqy,oypwtcw3 p*2reduces 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 souni*aja;h 4obp0ol3 or1 8g (tbrce that is radiating equally in all directions. What happens to the intensity level of 83 tg*oon4hpibo ;a 1lja0(br 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 kmh*x9+mrj8 vk/ tf3s 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 tl,f:fe7v/9zt ma zk:kone. What characteristic of the sound increases?t7em akvl:z/f , 9k:zf

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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 musical no4,af4wacyx s86rgvc .te?

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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"zbt0p y960 sp zi75 +*ojpl/yo fzv+gg of 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 from a8 )rjabibfl0/x)x) sr q*i q5bir 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 displacement waves ad7zt4(sy m8r)d zh sp8re

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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 huc;i,o0x a/ ecn.d -qwave generated by the guitar as a result of this vibration. What do these two wa, eadch; x-ic/n q0uo.ves 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 a, b(afpwqm;:p *srdn9t 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 threeps k8hqo2gq1q (m tqb 5sq8:z6 lowest tones produced by this pipe?8(hszqsbm6p2 5q :q8 1qtqok g

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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 length L is 200 Hz. w byh9;px2r f 75lzje8:qxvw0 Which one of the following frequencil 5 e h bzrqvfxw9pxj28y0:w;7es 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 iss/(n z ia4gml+xoy; *r resonating at its fundamental frequency. Which statement is col/* ( xonzarysg im4+;rrect?

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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 *j 1odipc 01b5)lvpi dclosed 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 wavelengths of the three lck5qrsy0k ca7 +w pneb vv(0i0 ffr-8/owest tones produced by qr 70 k fypevcwv/0+ac i(8 f5rs0-nkbthis 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 raj .ryh1 gmjz(7i- pp.esonate in a closed pipe of length L is 200 Hz. Which of thh7y-jrppim. .g 1az(je following 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 ent9x2s;l ohe .n oa(s1h ++tbnhd is resonating at its fundamental frequency. Which statement is bss1 t+h(o.9;htxleon 2n+ ha 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 twi9f):d2,h5nkemn cn6 xiwvmjg /l5:jo speakers driven by the same source. Each speaker produces a tone with a fd/: :5wgvn5i,h me9mjxc6)nkfn lji2 requency 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 beats, the two sound waves should zt(fs* nd(2xq1k5x pr 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 together and a particular beat frequency is nqjbra a1 itph -mv8301q 3)3e+kq nafheard. What hap1-e 10qnpakqb 8qmrhf33n+ jaiv3t )apens to the beat frequency if 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 ex(:y+ 2lrf ewbcplains

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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 heard bz0 teik7c 5i+y- pht.l-lkho5 y the observer ishck z+.7h0y5 t5 k il--ltieop

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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 observ9 + /w1lg; zgkgzbgvn,ms.o, ler. The frequency heard by the observer v / n+lg.z ob,m9ks, ;gzggw1lis

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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-angl;s b8x6xg8; rtmkw1 hje will decrease by a factor x6;gj8st bxm18rhk w; 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 9ao6vqfq 7:ik frequency 45 kHz in air is 352 m/s. What is the air tempera 9:qovqf7ki6 ature?

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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 ovvk ko nc.-i;;0g-uxu f 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 airwdl 7e4 73lcje is 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s later. How eljd e7c7 l3w4far 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 4.00 s. The tz ffg5bc56j ha oqk361emperature 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 flash of lighv z4r oa3z vfihu3)9vqnk5b/-9e8qb d tning, the distance to the lightning strike is arv4zuv598h 9n -b ikoqqbfa/z3 vd)e3bout

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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 day theb vh7an,g4 fz+ 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 we x db3:x2bg mql15fxr+ pd4(8zwnk;zmll and hear the splash 2.5 s later. How deep is the well? (Ignore air res8 bk:w15drzxm+2xpnf 4;m3 (bgxld qz istance, 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 frequenc +y;lo;83fq zijs cxwp9:; msqy 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 at .h9( k/fi8rlf *nfehyrg:wovs6)8t r$23 \; ^{\circ}C$ 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 with inn*xm1(c6*adp2w 5azv ,mlxy6a7xo crou: cb1 tensity $10^{-3} \; W/m^{2}$?

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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 70-dB )z-v ,k. dfrfjsound?

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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 sounds with intensity lf7a2)qad(*4 ch vcfjc,v s2b tevels of 70 dB and 402c v, 4c sh)d t*7ffc2aab(qjv 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 garage is 100 dB. What is the intensit, aa*iqz2,b q56v57zwqrdh swy level generated by one e,ws *6zw b 2qr5qva5qa7,hdizngine?

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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 equallxl6e3y dk.zl9y in all 96k3l.z dyxle directions 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 ewtu.c f5/wc ex+f 4.78msdtpequally in alwp/4fxftc.tdc7+ mee5 us8. wl 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/;axk(qy)sxwebsiw )c;x//b (; kq tz about 1 mW of power, which is assumed to be uniformly distributed in all directio;;/xkqb)i;tswqacbkz/ x xw( ) ey(/sns. 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 w ac; 7qjng8j(tould be the intensity level ifcna8;7qj (t jg 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. What it6 .g0 x+7n +hxajeo-gl web7ws the intensity level (in dB) at a point 2g7xl b agx++eo-t670. hnwjwe .0 m from the 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 letl zbnd1(vxn*6c t5 9ei kll;8;tte:cvel 5.0 m from a point source is 95 dB. At what distance will it be 75 dB? 8 z( k:;6tivb;llc*9dt5ntn lc 1texe

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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 compqi-ir)hgd,a f/t 0hr)nyk*)vlex tone has a frequency of 1200 Hz. What is the frequency of the fourth ia dhrg)*fi-)hvn/ 0kyq, rt )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 of an open pir(x7p. xladl;hu,jx 2pe is 900 Hz. What is the length ohx.l(j;u7,darlx 2xp f 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 open pipe of 942uu6)c :5no imsdqj0.mpcispb(vllength L is 400 Hz. What is the frequency of the lowest tone that)6us pc im54j(:bn0vpd 9m2isuqlco. 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 a length of 0.80 m. If the tc rd3m3 rtd zo824mz.velocity of sound in air is 340 m/s, what is the frequen 42ddr8om3z. trm tcz3cy 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 rl(*6lkh k6pa;f5-aap/ ublun oom where 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 closed at one ehj b4q7v/7r5 0xkojpa/w h-:z8z kus bnd is 330 Hz. What is the frequency of the third ha :8j4bx0/hq k-u 7pohka wzbr vzj/7s5rmonic?

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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 thehw 9e8:jw8 av/9sqgiiy*auu0 shortest pipe closed on one end that will have a fundamental frequency of 60 Hz on a day when the velocity of sound ia9ew0*v8j 8wigh 9yuu/ qa :sis 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 tempera d0i4b9f cr4acstr gh;-6 kz)*wlufy)ture 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 temperature is 28:j1dkr xqlk$20 \; ^{\circ}C$. 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 playxlhfomx,7le a 63 gnf3j*ut 8 ko.cq92ed when the speed of sound in air is 340 m/s. What is the fuke n o f.a6*jlu9l 7h3gqx382om,xtfc ndamental 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 open and the other is close oc2,4e6u gw--b7 4cizaka9 bwiunl,pd on one end. If the fundamental frequency of the open pipe is 300 Hz, what is the fundamentala6,wk2,-4lio7 uucw49pc bb-gznia e 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 Hz in aif)kx5c /lg/ urmm0s z2r where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved so an observer in front of the sources wouldf0 xclmr g/5)u/mkzs2 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 ks)f,(quw/pq by the same frequency of 500 Hz. If the distance from a person to one speaker is 5.00 m and the person dete/fwu (q),k qpscts 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 and 444 Hz. What is the beat freq-3cv1ig,ud2 oh:iglkcjo2 d6 uency?

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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 t 1owgild b1)v4kva78to tune the frequency of a musical instr4 dv ka7bo1 )wi81vgltument. If the 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 produced by two horns are 6 mp30 sf1pve2 su and 7 m respectively. What beatss 1 v3ep0p2uf frequency is heard when the horns are sounded on a day when 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 viv ibjy39 rhv4cuh0o m1a8-f,colins 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 strin-h3b 4 c8miojrh9, fv1yvac0ugs 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-H i ilplv/w ,-(esx.dq7z sound source at twice the speed of sound (x /d 7vqslewi,-.lip. The observer 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)irxn cqcguc ;i /um-l6 .6f6n1 approaches a stationary observer at one-half the speed of sound. The observer hears a freciu-im 66xfu. c/rc6; l1ngnqquency 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 lid5+hnr-u ug ex5i)s,i stener moves with a speed of 30 m/s away fr,s+-gi5iuh rxed )u5 nom the source, what is the frequency 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 traveling at 35 m/s on a dxn asocsi2)ms-)-moww; )(xd u8ldc+ay when the speed of sound througx+- s2;xo(wsicc)ndds8 )aulo -wm)m h 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 observer when a train appro6 icbi*bw.y:e h oql 9.*w9eaoaches with a speed of 30 m/s. The frequency6*e9 o*eay ci.9l :how b.biwq 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 40wt*3*tsi7 j7dw mn,h x0-Hz whistle. Take thex7td,3*nw w*sj ih7mt speed of sound to be 340 m/s. What frequency 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 12u scgsje7h 13zeis h0p// 2t arg16qr20 km/h toward a stationary train. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency d gqe s36hsh1rg r /21jza/ps2iec0t7u o 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 blows its 40aku 36ek ,j,mb0-Hz whistle. Take the speed of sound to be 340 m/s. What freque, ,aku m3kjb6ency 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 froasl8 ej (9fs;cm you at 120 km/h. It blows its whistle, and you hear a tone of 400 Hz. Take the speed of e 8f(sj ac9s;lsound 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. d/zzifj fdz0 :5;s(nrAssume 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/s5d/j: fzdfz( z0rns;i ?

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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 sound in air is 3i 0n7drz5) syl40 m/s. What is the frequency heard by an observer if the observer is appr5yn 70dsi )lrzoaching 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 tnfs )rux)yn+,he speed of an object. A 40-kHz signal is sent out, and a 42-kHz signal is retu ,u)y)rnn +sxfrned. 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 conical shock wave produced by a s ea4ljjk1u f*:upersonic 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 hamj ( 0duie(4v-c/9ixqute5t k lf-angle of the conical shock q5 exj u9cd-m( ve0ik/tuti(4 wave 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 fl aulxzwvy;31i)8uw2o +s(n ywies from the United States to Europe with a Mach number of 1.05 wherulwxy3s;1ni) az+uyvw8 w(2oe the air temperature is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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