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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 falsv a h;jk8k9 2jdq+s0ege 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 co5rocz)gi7y 7 r*msn1znducted 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 sound iuc8j xkqa2 + 7t/ayfnix6dp.: n 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, what happens to the velocity of so/kmy,:-rq on qx/3 xround? (Assume t/k q,3rx/ moq ryx-:onhat 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 a8 f335)f) ez ufquaujms1zl4y 400 Hz sound, the velocity of a 200 Hz sound through airyzu e4afq) zuj133fu8)s f 5ml 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 jct.j*dnvv(r1qp0qh (ym*bv9n) u 3q sound, the wavelength of a 200 Hz sound i9v*rqupy(n*)dchm (3j n0 tq qv.1jvbn 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 ca8wpt7m-5h5a .b . chkrtic8i glled

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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 cayx b +,90t nay*elilb0 d+f;uqlled

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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 directymi c pw: yue9r0(3d4tions. If you move to a point twice as far wp:i0 u m(9dcy4ryt e3away 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, in 9 tf1) t-d0bf1h3+yu gzdcekftensity 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 pointfi-n4:tsp*vla r30 u h source at a distance d from the source is I. What is the l*t p afsn-u :3h04ivrintensity 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 distanc7zu/arr o(tph(yw+f(y:aaxbi6 o5zio l+- s- e from a sound source that is radiating equally in all directions. What happens to the intensity of the souy(7- +i( lzo+u5z aoisbo t6-rhr/ awpf(a:xy nd? 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 soun tv.p fzb u,m:r//4mjpd source that is radiating equally in all directions. What happens to the intensity /mf zv4., pjrmu/btp: 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 beuyiw;3*8x. bona7d bscomes 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 t-ld clrgl,l7/+mkmx( r frc20 one. What characteristic of the sound incrd +r glr7r(ll /l2c-,kmmf xc0eases?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines "louqkhiy f- +o6x+dness" 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 musicaqtun (7q+8b 7yp wdv:bl 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 water1s bgbtmrov ,o8 a1kv75vz0n0

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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 ar :lxv260minohuew/ olj0 wr6+i-4x x re

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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 n(etc,;av70r fpoe,l on a guitar string and the sound wave generated by the guitar as a r7,;ef0tr na,( p lvceoesult of this vibration. 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 at8y) r35aec pg5qvj)0dgwwp v) 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 lexcb6 r4 fwqd99b1gh k.ngth L. What are the wavelengths of the three lowest tones producxgh9bkcqr 1.94f wb6ded 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 open pipe of length L is 200 Hz. Which one ofrc;zl3.y7ag p f1+ybc the following frequencies will not rr7 b. ;p1zgf3 lyacy+cesonate 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 fundamental k zbi7 h:mn0-q6yrhga uz 9)6cfrequency. Which statement is corrz- u 6khy:h 7r09 ic)zbnmg6qaect?

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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 at the other, tq(mlo8 iz6 8kyh (.wrzaltvv 9zq7 6(qhere

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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 le18 qzaaw4+*vjyzmv ; j2n)hipngth L. What are the wavelengths of the three lowest tonnp 8ajviw)v qzh*+;zjy42m a1 es produced by this 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 200 Hdm t/u lorjytb.fmy3 2fjp-6 k f5ao6b0/ q5,xz. Which of the followingff 5.ty2m,65u0/ -/dp3ortf bmyka6xqojj bl 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 resonating at its fundamental el;bx(pa dr; a6 g8 j+qb57ojlfrequency. Which statement is corr8(agel6 xp+br; o5b7jjalqd;ect?

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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 same source. Ed8m qqz*0 jvz2ach speaker produces a tone with a frequez vdz*qqj208mncy 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 ham jsi7l9 zeav o/zi517ve

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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 particulitza z.w9 s,2jw,ay6 k:/c escar beat frequency is heard. What happens to the beat frequency if the fci jy.9as /2 wk,6wz,:ceastz requency 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 exp7ssu; *pag j22w+aixce 8uw 4plains

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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 frequen ;xcp x88h)2ihy3 d tzbh6o6dy .ic,egcy heard by the obsez8exd8; h2byyo,g.c3 pd i ihc6x th6)rver 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 svte v5;4 t-0izxrk*gjtationary observer. The frequency heard by the observt*z 5;4evtrvi-g 0xjker 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 MAf/mqn fe7muh:*e,n n ,o7,wt yCH-speed, its half-angle will decrease by a factor of: ow/mf*ft7n u :meqny,7,eh,n

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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 24gc nzagj( 5uair is 352 m/s. What is the air tempenju2g 4a5zg(crature?

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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 thez , gyrkz/3sed .alw4e ,k8ems26h -nxet8ni6 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 34p14 tks(yknkzp /)af6ws3o r00 m/s, a bat emits a shriek whose echo reaches it 0s(1 rt6kk p)3szfnwo/pk4y 0a.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,aavip:2rzd77d 0b b o 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 flash of lightning, the distance u5v7 i5bg; wmn h54pkato the lightning strike w4nv7h5mu kb i55agp;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 day thezq552x 8w hfjewg ./co 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 deep i p:)dnmk3rrd:dv*27w4 na ssiz8.cd ls the well? (Ignore air resistance, and as*dipc r d4rl2m8s n3k)z:d.7asw:dnvsume 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 t kifc5if.uhc1+ tzf:ea./z, k00eis500 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 atik2 49hehro eb/j. g7i $23 \; ^{\circ}C$ 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 j2 ;tm 4pphag0v+:wlbof 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 airrfs7v m,c t9/(qwc g,ta;m. 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 sou(ue7fh:kfdbb08 gxb +nds with intensity levels of 70 dB and bdu:e80fh7x( + bgf kb40 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 1n(eg8 6ahyv xq0bnj 2100 dB. What is the intensity level generated by one nh ge x0 ny81bj2vqa6(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 mi9t 7s7vz g bl:deq *y6n/sho) from a source that is radiating equally in all directions*d76h)7oney:vqsi/ 9s zlt gb 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 equallyown tc 1ai;w)de,i/l/ in all direction;c 1/el,tw i) oiadw/ns 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 assupqm;sohvj;+ j25pd n3oa4t 5 imed to be uniformly distributed in all directions. What is the intensity level pt v5;d54 jo3 ;ao2 +jihmnpqsat 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 woule6p w y7sg*5rlew,;n pd be the intensity level if two identical dogs very close to each other are 7p5 ,en6lg *swwper;ybarking?

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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 intens v;1sr ; i:3 ohyao23tpu1c0wfjnwy+qity level is 60 dB. What is1vy1;:y;wo3osq au+h2rpcn0 tij 3 fw the intensity level (in dB) at a point 2.0 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 level 5.0 m fromi9 dyune, ltxz.r++ s6 a point source is 95 dB. At what distance will it be 75 dz . td96++uienl ,xrsyB?

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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 frequencuzg4j pyi2(r/ y of 1200 Hz. What is the frequency of thej 2/(4uzpryg i 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 of an open pipe is 900 Hz.r9 1;u- b8 vyskctqhq; What is the length of t;rqk 9t y 1;-v8quhsbche 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 lep3gi44tye m s9vbay;- prc60jngth L is 400 Hz. What is the fre rp 4gb9;jse4v0iy -ymap6t3cquency of the 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 a length of 0.80 m. If the d.zbz:+nw5rk -g7u kc velocity of sound in air is 340 +b5 d: wzknz7g-uck. rm/s, what is the 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 the tesn n4na2)cgsrozhlp0w 3 2c)0mperature 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 h( j,;e3 sm u(yud w.8h*pipwld*h/x cin a pipe closed at one end is 330 Hz. What is the frequepp;i w,hds*wdx( e(mlj8* hu c.yu/ h3ncy 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 then,jj*k *w1w )mf q+frtgd2 zz8 shortest pipe closed on one end that will have a fundamental kz2df*mnwzw, g*qj+1r )tj8 ffrequency of 60 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 in a room where the temperaqm vwgcp-f w.j:(z1f 7dd.ruu-l x2,iture 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 whe+ 6i+ :rrgmbvtre 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 u8 p(d-llasbr;o;u 8 l0.75 m is played when the speed of sound in air is 340 m/s. What is the fundamenaloub; 88- l;sprud(l tal 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 yvbc qa,j0 ;6tis closed on one vqab jc60;yt ,end. If 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 frequency of 800 Hz in air where the velocity u46;b8; 4dz6 geowkzekflsg4of sound is 340 m/s. How much farther back would source 1 have to be moved so an obseregl z ebz4d4k ;6g6fs;w 48ukover 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 frequency of 500 Hz gz4d+ m-1qzdu. 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 qm zd4du+1-zg 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-f s 7k82xfvpjency?

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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 tvi:i ekje+ ac 3,s*o-lhe frequency of a musical instrument. Ii l e+,:k-3vaesojci* f 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 m and 7 m resp6piq8cv6mqx-v4d .0o-y rol qectively. What beat frequency is he cx8p m6r-ioq6y-qovvq0 d.4lard 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 violins in an orchestra ark5 /sg4sva)c p+r)n whe found to produce a beat frequency of 2 Hz when a frequency of 660s/p4+c)g)v5n aw kr hs 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 source at twux t lgs-.urf.w.6 vw/ice the speed of sound. The observer hears a frequency.s-lfu. t. urwg/xvw 6 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 obserol4 l4r:n4 rgw-h aj0cn861bkgkyd4aver at one-half4jnb 1dgk4:84 46wgc la n l0rrahkoy- the speed of sound. 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 1000 Hz. If a listener mx +k o:4ugvkb*sw5r hiwb:+p,oves with a speed of 30 m/s away from the source, what is the frequency heard by the observer?hbb sk:5ouig++vx ,* pww:4kr (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 daynyyn 9hz6v9/n)cucl,re by,,v i g 9u0 0pfc*s 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 09, c ,cg/ 0np )un renlsh,c i9*6uyv9ybyzvfof 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 stationarptf+im 5y+567dhr mlh y observer when a train approaches with a speed of 30 m/s. The frequency of the train horn i5yd mh ++r6i plft7mh5s 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 40 sz4s +csr*0enaa-m3g0-Hz whistle. Take the speed of sound to be 340 m/s. What fr4* +0cezg-3 nms sarsaequency 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 itsthtb.cg tau,:jl(lutb o0: zj;xj-8 ; 400-Hz whistle. Take thc.g a0 tzj:b tt;,l jb;-(hjxt:u8olue 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 as1c. trz7ex. rway from you at 120 km/h. The train blows its 400-Hz whistle. T ez1cr7xs.r .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 bxd, 9)ww +4qks1tpt-g-ysezkm/h. It blows its whistle, and you he ,-)e9gpqs 4wd-1z x+yswkbttar a tone 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 ooz) b3*rt ;1 e.fzkrjHz. Assume 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 zoeo 13*kjr ft.brz; )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 tupy9f6thrt0+id93cq,pr4 d f rain horn is 500 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer if the obse uddt9+rrft fpcp9iq4h 60y, 3rver 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. A 40-kHz siia1 vvg.fs4 j:gnal is sent out, and a 42-kHz signal is returned. Assume tg1ajif4 v:sv. he 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 sh,7nxm, )y*d+r ibew vfock 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 the conical sc6nv3; hobw 9issp/.x hock wave forme h.s6xwv p3;csi 9nbo/d?

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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 Unohigo9 5u( lh4ited States to Europe with a Mach number of 1.0g5lh iou o(94h5 where the air temperature is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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