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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 sta0 rlj qgu )9o3x/o-ayytement?

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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 throu33n da7yih /1,bt+is7xs nnorgh

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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 souw,imtt0 tt:i+ nd 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 tsjo (rr 0e+ p13an)zfhi)+d 7brrw i5the air increases, what happens to the velocity of sound? (Assume that r7tfie0rs) o51)aizb(r+ hrw n +3dpj 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 velol z-; t5l3rhuc)-oxmccity of a 200 Hz sound through cu--oxlm;c l)rh53tz 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 Hz se5n(niu*n 1 dkound, the wavelength of a 200 Hz sound in air 1(nn *k nied5uis

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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 tha6p( 9:fut7p0zet+,gkktg ubs n 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 fhvz3:)u*)muxa;4w9 bxuw y hless 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 emitting waves /q 05 8gclnwymuniformly in all directions. If you move to a point twice as far away from the source,g/yl0w5q8mn c 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 divergi. q;yuw6p k 1lufo3+adng waves, 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 source at a distance dljn9bhx1 q *v5 from the source is I. What is the intensity at a distanv9 * 5hxlqjb1nce 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 af m;v*1wgrgtn *43qu vpv m4b: sound source that is radiating equally in all directions. What happens to the intensity of the sound? It reduces tv 4tmr1vnw4f u :bv*pgm*q3;g o

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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 equally in all6l)3 w lq- fcnit)f1oh directions. What happens to the intensit)n 3f)w1fltc-h iqlo6y 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 o80 fs41sqdwdt4zf .la se/:eincreases 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 zua gxe *g w/(y8 s(;zqcmo-9 0tce4flspeaker emitting a pure tone. What characteristic of the sound increaszmyu4ogxcwqze8- e; /lfca9tg 0 (s*(es?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines "loudness" 53dyxys:8c gw 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 da7c) k8fs f. htfj.aj 3f9kr4musical 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 airq : biymdceh93mo:d,m.9m , vp 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 wave vfiiu:- iu twn)926ths 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 guitar string and the sound wave generated bn,1bpsfi;4f 9bxzio- y the guitar as a reso ;fib9biznpf-1 x4,sult 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 at mz vmw+)j 01ph(z odpo*;w2rw 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 theq.o ny84kg)uc three lowest tones producck.8 )4yq uonged 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 pipynaux:kp 26a,pe p 1m)u 0bdc;e of length L is 200 Hz. Which one of6 aaub pdk;)m:p2,ycx1pen0u the following 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 fundament3pg5km s4o:rj9: bhwk al frequency. Which statement: js59br p mgkwhk4:o3 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 and closed aw0 -jue+x8buw t 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 threa7 /n7orqo; pve lowest tones proda7;ooq7v/n rp uced 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 Hz. Whp8 wx7ndt ,dx2ich of the following frequencies 2dx87n x,dwptwill 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 fun*makgg(c k i) yzx64u2damental frequency. Which statement iszkg)m2 xy ia6*uckg(4 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 same sour u md1kw0v*myl49kyd *ce. Each speaker produces a tone with dmy1*kv4 y*dk9l w0m ua frequency 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 shoulzx z9g/he)nwmx+e 5z7d 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 particularrakiktn /8usz :j5h) - beat frequency is heard. What happens to the beat frequena:huj-r)t 5i/kkz 8 sncy 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 explaimdu10 mp8d*;vuh spc3h4.s bmns

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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 stationary84cxg6gilot0w /; yst;o0o6ngi;sm w observer. The frequency heard by the observ0 tolgxss8w o6; ;;igyct64mgo/w n i0er 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. T:setx06 ryn l:yuvt5( he frequency heard by the observer ix(5:yel unyr0ts 6:vt s

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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 decrease by z k)kfw l-/59m9ngxkda factor of:g/ dn)kx z959-mwkk fl

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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 soundsro kin .0/ ukoxy9tzakk en+8 n,l)gylf499( of frequency 45 kHz in air is 352 m/s. What is the o)sl(nur/ nfkea o4k 90ikn.gy9yx8l9kz + t,air temperature?

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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 sou9fele +bwy2at6o 0q5j nd 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 gjz0ox 2crf 10in air is 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s later. How 2jx1cfro z 00gfar 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 temperature is 8z cj-fk+exd 8)ug, qw:que,n$0 \; ^{\circ}C$. 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, erhcud;uq3.79 x .w t6vh)rvsthe distance to the lightnv73uh.we xc; 6sr9htr)v .qu ding 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 s from a cliff on a day the temperature q.+sp5ki: 6zf d+uoj iis $15 \; ^{\circ}C$. 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 heanxx2 ngj ql)1ru / *.ey.s jyx0jp9y,ur the splash 2.5 s later. How deep is the well?,u2lngy qex r9 jsx )jyu.x.y1j 0p*/n (Ignore air 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 soun-g n2dxbrp(6(fob gy: 0w8avqd 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 aiq8n8jv,9u8p dnf y;u fr at $23 \; ^{\circ}C$ 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 sounjd8h jn.0p57f ddxi.gd 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 a 70-dB soundbem5yg318b6- 5mi ,d hl9ka.vxyzti x?

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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 , oo(g6hr9 rm2rgau *sbr2 v-psounds with intensity levels of 70 dB6r2r2sap og-vbu*m rgo 9,h r( 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 engines in a garage is 100 dB. What is the 0q0 c;ak c-m wr8xu2umikg./qintensity level gene;g.iaxm0 k2- qw8umckur0q/c rated 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 of 6.0 m f /cx3j km55bofrom a source that is radiating equally in all directiokjmco fx/5b 53ns 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 ilzl06. s5btoss radiating equally in all bso0 .tsz65ll 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 mW ofsd jaf. q t6m;6rvc5j2 power, which is assumed to be uniformly distributed in all directions;c6 tq2a5fmd.r6j svj . 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 6q9gmmq fnt(c/aq f0-55 dB at a distance 5.00 m from a barking dog. What would be the intensity level if two identical dogs very closea-qnf9q( 0 5 gqmtm/cf 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.nt+-r d.j5uuqv:t*t8b3z q yy What is the intenjvu t5*q+t.z-yy tqnu3: b 8rdsity 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 w82 vzv)i ,7bhihm z,1o-w v1 lizg8ja5.0 m from a point source is 95 dB. At what distance will it be gi w 8lwzb,8) a jm1oi21v,-z zh7hviv75 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 har0 zs. bapkiu/hp ,(r6s a frequency of 1200 Hz. What is the frequency of the fourth ha,p/ .pzi0u6s(r bhrak rmonic?

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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 pi:.il37 bou nqvm(o8 ylpe is 900 Hz. What is the length of the pi:.o 3moqyl u8(blv 7inpe?

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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 reso/n,c ,hwuhj(8wr g1 vbnate in an open pipe of length L is 400 Hz. What is the frequency of the lowest tone that will resh/vcn,,1jhwwub r(8 gonate 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 botnbcj/ x(wj39 rutpcy06vbf4 1h ends has a length of 0.80 m. If the velocity of sound in air is 340 m/s, what is the frequwfc b4ynt(c v90 1p j/jxb63ruency 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 temperatur9nlwp/8ptl)i j0k *rse 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 33 (3tb/o,t ydk ,8ewof( qmzax;0 Hz. What is the freq,ymote8 ozw,3f(a;q/k( tdbxuency 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 :+s nv/w7qrb p,rutm+ end that will have a fundamental frequency of 60 Hz on a day when the velocity of soundwn,v :btp+umr r7 s+q/ 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 inud)q 8r ejj-gg4 9fdq, 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 imy43m+cn0i pa s in a 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 length 0.75 m is played wl.t-fgd,v fp wly w5ae*7 +uc(q2p ye(hen the speed of sound in air is 2c*e.vlleyw 5f , p (wf- (qd7ua+pygt340 m/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: o/hjys-z9x d 9xb:7hsrne is open and the other is closed on one end. If th -sd h7jhryzb9:/x s9xe 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 ve le*wx ez,21 lle*j p h*;f)i;hed0tjklocity of sound*klz1 f;* 20eed th)hjexjw;elpi* ,l is 340 m/s. How much farther back would source 1 have to be moved 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 frequency of 500 Hz.6orv2lku4ok3 xp n 7*g 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 a7no2xp4ou*v l kkg 3r6 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 s0kigd+n5va lz:yrc9 xjaxq(z. 5+t1 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 fork to tune the frequenc 9,onzim f8m)*pn bhz0y of a musical instrument. If the tuner hear 0)hniz98bop m*z,nm fs 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 arek6(nu3j a0d cb 6 m and 7 m respectively. What beat frequency is heard when ba0 nd(c6j k3uthe 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 oe3v /5nd hfhsa:pgv*h81 0 ezgrchestra 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 ofdhe z80ghg*p an1v:fsh3ev5 / 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 souno45,syc+bgcf up-4svd source at twice the speed of sound. Thpfsc4b co-y5s +g4v,ue 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) approaches a statio*-b tid5)i ebbnary observer at one-b-*tib)i de 5bhalf 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 moves withk)da;cig (6hl a speed of 30 m/s away from the source,adc kl)6 i(h;g 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 sirtd3. ts92 uen1oxahw22p1sf:cl tn g9 en. It is traveling at 35 m/s on a day when the speed of sound through air is 349ou9 xs 1th :2edn3fs tanwtgl21 2.cp0 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 h cc+n6(ew- qvi+ nftk0eard by a stationary observer when a train approaches with a speed of 3n-0fwtq(cnec + +v6k i0 m/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 shje6pg6w 6 (1ji+orcv+ )km wblows its 400-Hz whistle. Tgi6+wj j1oer6vmpcw () kh +s6ake the 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 120 km/h toward a staauhaqqz6roh iv )f;s-+b // .jtionary train. The train blows its 400-Hz whistle. Take th.shbfq//+avuqz jh)6 -ar ;i oe 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 away from you at 120 :m9qx wxm.4x u(6heqt; sl4j gkm/h. The train blows its 400-Hz whist.:u49ewjts; q lm4mg6q(xh x xle. 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 its whistle, and you -dzjp9p4 6qkc hear a tone of 400 Hz. Take the speed of sound to be 340zd9 -j 64kppcq 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. Assume the speed of sound i 0f 9mju5hurj(n air is 340 m/s. What is the frequency heard by an observer if the observer is moving away from thef0 5jmrj9hu (u 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 train horn is 0 xmf.2l aw-pl500 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by amwl a-p2l 0f.xn 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 odoy5ry dhc07 ,x1ll;f bject. A 40-kHz signal is sent out, and a 42-kHz signal is returned. Assume the speed of sound is 345 m/s. How fast is the object movind7;1 o,frhyyc l0dxl5 g?

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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 e0j sqex2l4 r(mny84d 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.oryqd,z - l(n: What is the half-angle of the conical shock wave fo z-on,q (dr:ylrmed?

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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 froug n*k(qn s rkg,8zo-9m the United States to Europe with a Mach number of 1ogq( g zu,8nrkk9-*sn.05 where the air temperature is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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