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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 s2aj7wd+* rqaq0xiv9 false 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 thr .tcbc*v)(jps j4 e yi:6cv*ksj/q g*iough

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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 steel3 5i;f 2pqwnid 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 airo , sz*fn)(or(vmynz) increases, what happens to the velocity of sound? (Assume that all oth)(,) (ofvmzyszrno* ner 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 Hz sound+z j1g whyx9 5q0i.ymi throug1i0yim z5j9+hwxq.y g h 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 sound, the w4qjx*3qn .9r e p6xwa8f zkq0gavelength of a 200 Hz sound in gnq zjwq.3q0 p 8*e9k 4fraxx6air 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 frequeniu:f xs p5(ih++ m.jofcies 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 less than 20ltw;fvo.bi1-s (xd +w 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 sourcem yv*1hdrasg(2+ m;sr5xqj 5u ;pxdtlm 3/k l2 is emitting waves uniformly in all directions. If you move to a point twice as far away from the source, the frequenc+/ hkj 52 r mrs(mxatyu3s*5x1l;p2gdd qm;lvy 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 wavgyo d)6;qzek+es, 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 d from the source is I. What is a xp5f)d82-kfni6 vbs the int ib8a xdn26f vf)s5p-kensity 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 48we -mnmnoqn5 *9vg f v;wuo-from a sound source that is radiating equally in all directions. What happens to the intensity of the sound? It m*-q fve w nm4o5o9nugv w-n8;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 thej1s:/dlnc(+i l; hn aat is radiating equally in all directised;nj +(:h l 1ilca/nons. What happens to the intensity 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 becomesq2-h. jp wfa6c4d2d aw 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. What characteristic ou.ss:p (-ngb bd( gvq0f the sound incrgsqv.g((sb0:nb u p-d eases?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines "loudn2k; 8x8fypzo a 0rh6yhess" 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 mus(dev;cg (a, dpical 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 a drgt2a;u(z)uir 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 aez m.u 6,l.dtm+ dwc1waves 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 anw:gb9t(v lixnr z+/g( d the sound wave generated by the guitar as a result of t /i9wlrtn(: z+( vgxbghis 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 both ends, tl d-7dw xih0eqi-)qb7 *jzs 2zhere

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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 aj t(w ./*bbtwire the wavelengths of the three lowest tones produced by this pip/*ti(wb w. bjte?

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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 ao qwlk ag 7(1m ao85u,gsw(et+n open pipe of length L is 200 Hz. Which one of the following frequencies will not resonate in the same ptg+wql8ms 1 ok5aug(a ,7o(ewipe?

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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 fundamental9diw/dna nq+bogd c4fx0c+ k 06-r6 ,t sntt3x frequency. Which statetqr 3b t n6d96cn d/+,o c-ai40tk+ nw0dgxfsxment 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 e-ze ;,x2u58y set jyysqj- k2tnd 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 pipek*g)aiwj- e,amuhqki6 b*)b 8 of length L. What are the wavelengths of the three lowest tones produced by q je, -)wkbhbg i)kma68i* *authis 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 lengtonbzn;b c 7k (7er2l*wh L is 200 Hz. Which of the following frequencies will not resonate in n rnc7 lz2ob(*b7 w;kethat 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 rqf3tv 0dp5 i :23gsupwesonating at its fundamental frequency. Which statement is corru:qw3 g2if3pdpstv 50 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 speakeo0n) v08/b ovxegh ojx g:6ca+rs driven by the same source. Each speaker produces a tone with a frequency of 200 Hz on a day6nvbg+ac vo0ooej0)8 gxh:x / 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 tws)dhfyn26 5jdadq.uf:gt/ta*h.v 4 ro 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 sounded together and a parfik* 8ku8 wuf5ticular beat frequency is heard. What happens to the beat frequencyk8 fu k*8uiwf5 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 explaintk(w x*;,ketchzzk(spv2cm. w:(h i b5; b0chs

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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 stationa6c f6aqu agi wado4/6)ry observer. The frequency heard by the observer is)ou6aagw64da6qi f c/

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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 stu,ms;(d-w2rmz1l ytl ationary observer. The frequency heard by the observeumt,1d w( lsmzr l;y2-r 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 MACH-speed, o9r jo cp-5f2+ftc, b lk3ib5aits half-angle will decrease by a factoc5ok 2,-la5jp+3f9 r fbi tcobr 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 i6 cwt eib76szez8:vqw q,y )+ps the air tem y,weszq67e:)qw 6bti+ cp8vz perature?

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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 soun2pp/r/ gli ,e73nw tccx4i9 hrd 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 340 m/s, aa:2l 5mn sir+t1pxyq , bat emits a shriek whose echo reaches it 0.0250 s later. How far away was the object that reflected back the sound?xm,nt+a2l y1:p isqr5

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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 b,xdmnyw2 ,/r/f t,w shear the 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 to nrm f4--/wubkw1wj:hr x ;)rsthe lightni:-4bxwrjuk /- m) w1fhwsnr;rng 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 2, ayi )ystke,a cliff on a day 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 n*(ma-bpn4 69 t ioumjr,o -/gp e xhfmw8h6t3s later. How deep is the well? (Ignore air resistance, and assume the velocity of s- tfn8utj(m, iowbm/p xr*ghp6364m-h9n oaeound 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 frequeosgr(/ n6jh :incy 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 atmz-7z-f bf/.- e9 gefca6omwr $23 \; ^{\circ}C$ 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 wijp 774o0 )h4d6dy v uafgb*jmoth 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 en0 q+ba* mc4u)cgao/hff9e270-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 p nh0d1ngj01pb7 juq8two sounds with intensity levels of 70 dB andqp 10b 8jjnu701np ghd 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 isf.m btoembi7)n z15-kg *ft+h the intensity level genern ozh7b+k f5 -m*b.tft)e1gimated 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 distas 5jaz) zcd /wdco2*;gnce of 6.0 m from a source that is radiating equally in all directionszj d a gcw*zo;c2sd)5/ 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 7npwcobz +f4/f2r(8r3e nfof+b -fj p m from a source that is radiating equally in all dire nb cf-pfr+f f(n2/pofj4z8ber 37w o+ctions 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 assumed to be uniforand)(g m.n j3rmly distributed in all directions. What is the intensity level a and3g mj)(n.rt 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 fup/ hk7a7y gj 89fcnk6rom a barking dog. What would be the intensity level if two identical dogs very close to each other are bay69k7kjfc gnp /78ua hrking?

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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 i4rn xm7-l5-j))a sdia9khy j ds the intensijjd-) 47n 5aysd ahxi9rkm-l) ty 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 8ha) h thjo+dlj(2*u k1wkf o6hno4 j9mqy :t(m from a point source is 95 dB. At what distance wi kq8u(j+a :jdfoom9*tj 14 )tkhwyo62lnhhh(ll it be 75 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 frequency of 1200 Hz. Whar1pts)jcgh ak;**d :i t is the frequency of the fourthd; s)pk*a tj h*igc:1r 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 is the lenr2 zeyx8ydl.(gth of yr d2lz.8e(xythe 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 length L is 400 Hz. Whatd;:vgqm q k/ nje:qi46 is the frequency of the lowest tone that will resonate in an open pipe of leng/q jn6m4:;dqqige : kvth 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. tyf)p:a uxccw(/wu + 1 If the velocity of sound in air is 340 m/s, what is the frequency of the fa(p+:u1uwyt/cxwc) 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 t nqj/yl,xs0kw611 eu yhe 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 frequb a54tm kye13w jsz*x.ency in a pipe closed at one end is 330 Hz. What is the frequekwt315*bjzes4amy .x ncy 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 ha:/b (.9tz;pfo pe,lui6t 4p;tdi csftve a fundamental frequency of 60 Hz on a day when the velocity of sound is 340 m/o.ttp9b /t pt ; ,izc;fp fdil4u6:es(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 tempec5jhhrzfya35t1y.kf a rq-w rk)1.2m rature 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 iym + k12 w8amocki*+abn 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 ggv1vsqi7 /n a:h 7qi ex)l:5dis played when the speed of sound in air is 340 m/s. What is the fundame g/) vvl7i::qd qhigne15sax7 ntal 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: xy9, fqhg3k2gone 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 closeq2x9g fgk ,yh3d 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 Hzs /xre97hbw0 q in air where the velocity of sound is 340 b x9h rqs7e/0wm/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 sidx8 ksple gaidk)(k /, 0a/ra+te 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 pers+pka/ka)/x (s0t, aide8grkl on 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 4/bxz(4luaem6gwx bnp60r0g * kkh6eof 440 Hz and 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 frequency of a musi*aiv; f)xv kp2g:kr .fcal instrument. If the tuner hears a beat frequency of 2 Hz, what is thep*iak2r :.k)vf gf xv; 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 )zlg.u0e olly (( jfo:sounds produced by two horns are 6 m and 7 m respectively. Whatl)e jgl u(:.oly(of0z beat 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 violins in an orchestra are found to prn+ m udn9; ,xkk:kj*sroduce 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 would brin jnm ,*k:ru d9x+;ksnkg 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 .ybh scsw;2 eb4y; 1dnsound source at twice the speed of sound. The observer hears a fre4hsbyc ;e1ydbwn .; s2quency 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 stationar f8wd-rb t93u pou du/yhuyh2k.(u8: sy observer at one-half the speed/ :r.pd2h889stu3uf-udu( uhkwboyy 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 txz ;.d)ddnpi,t8i.er tu)z(Hz. If a listener moves with a speed of 30 m/s away from the source, what is the frequency heardxt)p.,z( i8n; )zdeturdi. td 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 mv/ag . ak1h.3alcfh+on a day when the speed of s.h/ag3 .hfac+kva 1mlound through 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 dj p/o2)yt w. jlyfmmj*6e.z8 approaches with a speed of 30 m/s. The frequency of the train horn is 600 Hz and the speedlfyzy .j 2*/mpm8tje6wj d.) o 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.)u7vwu d7-g(hp rf uf. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What freu wfdu)v-7hp7f r(. guquency 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 its vpfi/g x i5o 4p4wxgo;kbs7 ),400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency,b4ifx7 svgw pk/o4 op5;g)xi 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 you2olur0v 6 /bd.t fad76suc nj8 at 120 km/h. The train blows its 400-Hz whistle. Take the speed 0fr 2bl7adj c8 ds nvo.uu/66tof 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 kmky+jy3gc qx8dh 8dlo96 hj8g-2ugbp 9/h. It blows its whistle, and you hear a tone of 400 Hz. Take the speed of sound to be 340 m/s. What is the actual frequency of the whistlegp8l-qj9h9y8 g6 3gd8h+xbyk 2 codju?

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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 a(+ 8bz vla4a*wtuzy*of sound in air is 340 m/s. What is the frequency heard byt 4uazaz 8wbv*+*(yal an observer if the observer is moving away from 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 train ho7n 0 vgar;op1vrn is 500 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is approaching the train r1 g;avnpv7o 0with 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 obrv5 )p anxgjq 8pkaa5a(o*y3 (ject. A 40-kHz signal is sent out, and a 42-kHz signal is returned. Assume(n (op5va5a jykx )qapr3*ag8 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 producedqrfpeea15 8xklp7. si3jli3 ; 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 hs yp1 i:-wmms1m5jb8xalf-angle of the conical shock wave formws: xjbmmm51 pi-s 1y8ed?

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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 Euq71w sr(hp(7 vd/ fbdsrope with a Mach number of 1.05 whds7wrf(/s dh (1pqv 7bere the air temperature is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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