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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 statement?s8r a2puqlig(7:h fzlz, ul6,

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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 th:d79u q:vvyhxyz2 ud- rough

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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;a2x3c9gb kj6syj-raf xc d:. 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 s ua:iy ct).6zml rp3np /*-fpvelocity of sound? (Assume that all other factor6py zlnp itcfs )a.3p:/r-* ums 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 r-h:j0jai 5 16mgrctq 200 Hz sound through ag 6:j0tmhr qjic5r-1air 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 wavelensr4jzn1;g0+l54 xg8ierd ak k :ac:ujgth of a 200 Hz sound in aed4jaga x j4r;k 1+:s:k 5ilu znc0g8rir 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 8mnra -qb1mb7ma7xt0 ,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 lesyaee r8rd 5drvw,mar 1q- v/;*ip 0n7as 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 source is emittmpv5)it)k) o sing waves uniformly in all directions. If you move to a point twice as far away from the source, the freque tkm)opi5vs)) ncy 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, intensityxhktu 79hb; :;g4za ch.-vin/t-pu d s 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 source at a distance d from the sougj8da: ia u5e6vc6gq 1rce is I. What is the6 e au6dg15ag 8:jqciv intensity 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 radiating equally in all fd9 )xjf7 nxa:yt,k :udirections. What9,jyd7)ff xxtukn: : a happens to the intensity 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 source that is radiating hgerdxl2dltf 1e+j6:rpxip2, 5,( va equally in all directions. What happens to the intensity level of the sound? It drops1fhrd2ji,eae g, :xp ltl5(x6 r vdp+2 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 incv hq0t: tpbqxv5vj*6 u*x,ze :reases 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 p6iepu c1lfx/7e7 a3bz ure tone. What characteristic of the sound incu7ez/3 7 p1l beafxi6creases?

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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 mua.hrcr p7 dzht5m7* k9sical 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 musical note:+k6 g ulgi at4gq0z.i?

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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 aixf)bg6x ), v /u.2u;o.zporsbil qlf8r 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+t 0ix(1zxv+ohaq( tr 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 sx y r4gnimbe59mk+*ev:96tvguitar string and the sound wave generated by the guitar as a result of 9k6 95 4m+vvx mtsen*birgye: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 axmqnif )7h2fmwz82 1 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 uf.czx-2)ff,4h jrq j the wavelengths of the three lowest tones produced f4r.j2f)fqjx, c hz- uby 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 quuwrg 7y pr fxpnv3ep ;/25k;r8n/5xis 200 Hz. Which one of the following frequencies wilu /exu n npr pvgqp3w7rf8;ky/2;5x5rl 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 lengthkq,h;w)c sd*9m e l5asng04by L is resonating at its fundamental frequency. Which statement is co0madkq cgl,b4 swnh9ys* 5;e)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 am feqn *7qru-qu 5.g/8tlbgf0 is f6v1t 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 the wavelengths of thw5+h-p/8 l z)uh ksjaxe three lowest t/kxa-h+l8h 5zsw)uj pones 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 le uug*m2.u),xvg3 b-( efkinacngth L is 200 Hz. Which of the following frequencies will not resonate iigb f),eug n* mxk (au.u-c3v2n 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 q rkyp+b43lqsa7,w ( xresonating at its fundamental frequency. Wb( 374qxy r+,qws apklhich 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 tu32 .6 rvhx q17bmjihihe same source. Each speaker produces a tone with a frequency of 200 Hz on a day when the speeix2 1hmvu 6 hr3ji7.qbd 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 h)w*5fdtdif ;c ,-m wi .miz0*hy7cbjlave

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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 s0 uw v.da,m*xf kg57pkounded together and a particular beat frequency is heard. What happens to the beat frequency if the frequency of one of the tones is m k5w k.0dgfp uv*7ax,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 expl. qu * xz.. 2vdcg.a,*1or:ooffuzzwrains

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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 by the obra6qd0 :ljo :0lefym, server yl0 ,dem:lj0fr :o6a qis

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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 obseym*9em38px9xpj (-jl il. ieq+42k / cvct mjrrver. The frequency heard by the observer e+ce/8lt qx 2j94mmpry ciji(j .m9v*-pk x l3is

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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 decreasequynd(e komc7dc.)0( by a fak ()cod c( 70.dnmueqyctor 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. What 2naypl(h * p9p.7ho neis the air temperature?n2 9 7 h.o*ah(lpypepn

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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 ofw9p(reu)k 8: i/ly8bkk qwm+mh,4 yin 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 gndb33tm(s q5i,de8w 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s later. How far away was the object thdb,tn( sm33dg w5i8e qat 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 4.0exf 6u:krg4i40 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 to thb/,6ub/ hn(flc 6*y j6t nyw vk6zxzy0vy6x3ce lightning strike iyy6c(xhuybt6 /zk60l/x6y 6 wnfb* n,jvc3v zs 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 dywv ;d/m,9h64xlqp z way 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 splashzaz2pn 5bnlj:b51p0 3b xc)fas ; qcm( 2.5 s later. How deep is the well? (Ignore air resistance, and assume the velocity of sound is 340:)l5 3n m1xz;sp05j abq(zbcacpnf b2 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 ag r) ctur- azx85y2.jq sound 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 at jy) ,k jsc6ju 7cr,ieu-5 /tyt$23 \; ^{\circ}C$ 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 izrv9b i/a6k-l ntensity $10^{-3} \; W/m^{2}$?

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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 7;,ssdzb. 5wfx, uk sar/i84p r0-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 intiyyt8z/+d 3crensities of two sounds with intensity levels of 70 dB air +cy/38zty dnd 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 h-ul6w19g5bh hmq p:yengines in a garage is 100 dB. What is the intensity level generated 91 ml6phw:yqu hb 5g-hby 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 so(gl/7fwk mt a:urce that is radiating equally in all directionm(g/ltwkf :7a s 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 f/o d1-gnypl zm3k9tzbr x1 p* n9fvd1.rom a source that is radiating equally in all directiotdgo.bn1d*nzp3x91vk9mp/y l- f r1zns 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 po/x8h3dbym 2srwer, which is assumed to be uniformly distrysmxb2 h3/d8 ributed 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 at a distance xv vb-e0q,,u(ysb 0 fd5.00 m from a barking dog. What would be the intensity level if two identica,0e,s(0 -ybfbv uvxd ql 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. Whay*y1.9:ed/c h yz .dq5apiooa t is the intensity level (in dB) at a point 2.0 m from the source? Assume that the ayd/o.qhoea yy c*d 91 :ip.5zsource 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 p5p vwydmgyuk:ogpe4 10a7lq. w 797mlevel 5.0 m from a point source is 95 dB. At what distance will it be 7w5g7qo1 7dyl a egm.:7k4py 9mwpp0vu5 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 fr-vn vj812 c 2kcpxrs9yequency of 1200 Hz. What is the frequency of then2vrk1xv s-jc92c8 py 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. What ipa7l-ovop8 nzi 3i9;6pl s2lrs the length of s2 lio6p3ilz7 lpvon89 ap-r;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 openzty38ua ry; iwl30zy; pipe of length L is 400 Hz. What is the frequency of the lowest tone thatwz3 ;iyu8t0y3r azyl; 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 ve(0+nmeq xe0r jlocity of sound in air is 340 m/s, what is the frequency of the seconx0 (+meernj0qd 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 ms fby *7e uwncl3,/(nwhere 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 end is 330 Hz. What is the uin lk5f8(ss8,rbx) afrequ a8,sn )lr8fsbki(ux5 ency 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 pipe closed on one end that will have a 5l bmf16-sbwrfundamental frebrml5sb-1 f6wquency 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 isimr6v95 xg p*v 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;pdmx d+iwk,hz,/m v- 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 when the speey skel5l4e*q u5/sjw2 d of sound in air is 340 m/s. What * sl54yjsw5 euke2 q/lis 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 titoke8028*ksrlg/b zhe same length: one is open and the other is closed on one end. If the fundamental frequency of the open pipe is 300 Hz, what is the fundamental frequency of the closedibr8 tl2ez/gk o0*8 ks 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 velociw eb;zt* (rr(jty 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 would*rtwejz( ; rb( 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 placelw3nrq0 wl8v4t cc 1(rd side by side and 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 possible the distance from the person to the other speaktvc1cnl 8ww4lq 3r(0r er? (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 nsh30gi .qn9ruency?

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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 tuk1w gys- z 50ds6chi/une the frequency of a musical instrument. If the tuner hears a beat frequency of 2 Hz,y6cgs d5sz /1-hw ku0i 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 soungrg+gm(:dyyh : 7i3j+sgwz i3ds 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 soundsri 7g g3w3 +mggy (jh+dyz::i 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 violi:axi70ml u;dqam rd7azx *6cj8wal( 0 ns 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 str u 6m(*0xrlz a ca7xwjaqdim78:;adl0ings 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 1w73dow q634. kai36 c vqngwvm000-Hz sound source at twice the speed of sound.miv a74 gow.qv3dw336qcnk w 6 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 cgw g,;w:qn+j1000 Hz) approaches a stationary observer at one-half the speed of sq;jn g ,c:gw+wound. 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 omlu-572kh o9hfvoknb9j4kw9 * e zb k+f 1000 Hz. If a listener moves with a speed of 30 m/s away from the source, what is the frequency heard by the observer? (The so *h j+9zmf 5 eb9ow-bnkk27l k9ohk4uvund 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.eewy x, m70yk5pc. gm is traveling 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 thc.km,pe .7mgwy 5exy0e 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 mchgmy /:3i7 ; (cj5jcu 1otpd68gezxapproaches with a speed of 30 m/s. The frequency o8h3oigj7j6tc(c1;demu5 : c z gpy xm/f 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.;54 9s-z5whl4ryhbzoo 7lu34u g xgar The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What3 x;4buaoh7r9 4w guzzys5rh 4 gol5l- 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 120 km/h toward a stat2z8 omknl-0erx tta+ kx5,:tqionary train. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency do you he2kxtt: qxra0o e+8mt,-zl 5kn ar?

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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 tr yw a .fdw6 7stjoubo(26e7*pfain blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequencu yopwe2 a(sodb767fj t*fw. 6y 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 awie6fc, /0banglq: o:im)c th ;ay from you at 120 km/h. It blows its whistle, and you hear a tone of 400 Hz. Take the speed of sound to be 340 mh:bgml;tecio )n/ 6a qic,f0:/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. Assume the speed of sound in 1kx, 57rljcgo+yh.vhvlja/ 0 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.yvol hc/5,avgr k x0l17 j.h+j0 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 hthz n r*:s2kbx24 icgtj(/wv9x) (q klorn is 500 Hz. Assume the speed of sound in air is 340 m/s. Wxxt2i9/*hk(g(r )bqjc wn4s:kv 2t z lhat is the frequency 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 objec6v bnsu98lb- u 1qi3lbt. A 40-kHz signal is sent out, and a 42-kHz signal is returned. Assume the speed of soundul3n s1b blq-b6u98vi 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 shoch xau a,g9d2w *qu ayxu)r bmzz(..x+.k 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. *dape:gu ,a: uWhat is the half-angle of the conical shock wav* :e u:augap,de 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 with a Mach numbqar,da9 0.r qwer of 1.05 where the air.ar ,09wdqqa r temperature is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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