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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 sth4a, w2:)1l.z dr2 xhqah fzetatement?

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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 conductedvjdhp42sz a8go7g7b( u2k7y p 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 sort tt7fq+sb +b (.+7ddmhy6 xfund 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 ztwgul4x )x3 ;air increases, what happens to the velocity of sound? (Al3 z4)x xwt;gussume that 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 velocity of a 200 Hz sound tc2xcmv,-gb*t;om : ayhroug a x;tvmbo:yc2c *m,-gh 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 soundsg,dn2uuz 0 .hcvuas 7 *(:hti, the wavelength of a 200 Hz sound in air us , gt*d.has2 0u :(zchn7uviis

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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,lc7yeu( -gp.v000 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 freqmi4-b 5 b0qiafe 36ccvuency less 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 unijy-k-sh7 l8u 6rtq- roformly in all directions. If you move to a point twice as far away from the source, the frequency of the sou -6loj-8qsyrh kr-ut7nd 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 divergizm/z )g 6 boq8g-owa3x 7l8lkyng 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 distance1o(c ;5/ vojx9s moptob3 u2kg d from the source is I. What is the intensity at a distance 2d fromjo3 uxpv 5(cb 9oog;kt1 sm/2o 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 radiatl6l)b-itbz m(tyqzv)akhz7 2(+a/u ring equally in all directions. What hap(qlmu+balb6(a- k7t 2zihy)/ t zr)v zpens 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 albvu49vk -y0y sound source that is radiating equally in all directions. What happens to the intensity level of the sounv 0k9l buvy-y4d? 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 becomes lo f8r-5dux)r6vbghf,ouder?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You move slowly towa1b3lz swp6by.o/ * 7lc.pwog v:(k jdjrd a speaker emitting a pure tone. What characteristic of the ..olp1j zcjs3k/owp bylw*( :gdv76bsound increases?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines "loudness" o2oc,0jxcmf2iw 3g56 rb2- oi pzntko 2f 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 agdjs*y*7 n nkzufwjs3: 4x (tb5s-9 nsi(3d hh 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 a)a630z8 r5zxlwbpi )4m sq thiir 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+24 otkpfvee/ 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 01 uefe,incbl8g ro5 2generated by the guitar as a10nrcleui2o, eb 5fg8 result 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 *x f vy)o9mb1wk yi2175*k ain or/tgjawf1c:is 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 xbb wa; )o3a)bare the wavelengths of the three lowest toneso3x)ab ;) wbab produced 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. Wuy3:/q:o2j/i gh*l6d lmv3)nseqod ahich one of the following frequencies will not resonate in the saoov3:s :2qg/anmlq6/h) jd ye uil*3dme 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 reqe0in ftpxk3z04w+y /sonating at its fundamental frequency. Which statement is corrtez3i/ 0nfxwkqp+0y 4 ect?

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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 thse1 1z7 mkfpw qngt*yw6nk624-vl2gje 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 th txf8.w qjd7, h0lj:une wavelengths of the three lowest tones produced by this hjux tlqf,.d: j07wn8pipe?

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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 ixf3)6tu5 r 4d09a,enkd*owcw il xgu4n a closed pipe of length L is 200 Hz. Which of the following frequencies will not ro n4)w*,cwa9x4 rg f503udldkux t6ieesonate 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 resona nw08n5rk v/rwting at its fundamental frequency. Which nn5/8 vrr 0wkwstatement 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 t nhmydfkcrq7 (ei46,8if2xx/uj e/v 2he same source. Each speaker produces a tone with a frequency of 200 Hz on a day when the speed of sound is 3 drk,cin 6e(4 fhu/ jqx8x/fe vmy722i30 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 beam)kv zi pg l,z3r5k)f4ts, the two 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 togethd,e/v as 8mf-her and a particular beat frequency is heard. What happens to the beat frequency if the frequencfma e-8d,/shvy 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 explains + diew+xg,8u+qjx/ zs

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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 hof8lh oe x/4i nian58(eard by the obse/ax8( lni8f5ioho4 nerver 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 obskzn.k)q z .qlfc 0o;h6erver. The frequency heard by the obs.kz; cqok)h qn6zf.0l erver 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, its half3ffb/v ;wuo) g-angle will decrease by a factor;3vfg u)f wo/b 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 ip4l1);mu-b iov7bhcdn air is 352 m/s. What is theb hv 7p;)clb4 odmi-1u 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 6 j3builml: 2i4jw)( y fdud7ql1c;xpspeed 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 340 m/s, a bat eme8fh hu+s1p y1y g7ev3its a shriek whose echo reaches it 0.0250 s later. How fse+e81 hg y7 uy3vpf1har 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 qfd,kblo6*bs*i2 n .fhear 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 t d0q9xwhk0 l.ehe lightning strike iswx90k .hl dqe0 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 temperfx6q31akbx a 7ature 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 deew+6tc fweo0i304 pnb (lgq5cpp well and hear the splash 2.5 s later. How deep is the well? (Ignore air resistance, and assume the velocity of sound is 343065n 4w cipeoltpbfc0 +g(wq0 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 500 Hz is9+v.an: aaqp9ki/c lf

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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 jp.lrp*.kz.h- 0d()8k qp vu/zclbrhat $23 \; ^{\circ}C$ 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 intensi1hzbmpm+x ; pdee9d+2ty $10^{-3} \; W/m^{2}$?

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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 ).sn84 m us1bnbeqk1w 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 sounds with intensity levels of 7nkd d/a45g2/da7 rntv0 dB and 40 24 t/anrddg dk n7a5v/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 np)(xa +ok- bndB. What is the intensity level generated by onea- n npx(kb)o+ 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 source that.l c)-1 ssx4k4f ktrgi is radiating equally in all directi4i-kcgsxk )l f.s 14trons 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 b ;w6whuf30gm equally in all directionwf6 wm; b03hugs 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 ofq 1x773lttwi e power, which is assumed to be uniformly distributl tqx7t1e7iw3 ed 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 distancj1r;o q1unqe89lq7 x,kix9cr++ il nqe 5.00 m from a barking dog. What would berr ,nqq1 9+u+ q18ic lj7;loxexn9ikq the intensity level if 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. Wharplx g/ .fsh.hq2 .sb8t is the intensity level (in dB) at a point 2.0 m from the source? Assume that the sourxhsb s28.f.pg . rhl/qce 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 leijmb- oxoi dd-fgp6: -kdt651 6teh(zvel 5.0 m from a point source is 95 dB. At what distance will it be 75 dB (ibo-o: htkm6e5x6--dt dgz6jd1ifp?

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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. Whaz3ks5m4rjwk/ u9xc5zmtwp fdg00fd1+ xv+ - kt is the frequency of the fourth harmoniwzj1w5kk5gfku+xp0m ztsd-3 0 fm +vd /94xcrc?

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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 lengh:kchs1x n:9s hvp+2zo,cg3g5bk j h+th ofs:5x :c,+hsv 3pzno bgj+cgk1kh9 hh2 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 length L is 400 Hzav8ymr-vj, 68xbh;wu . What is the frequency of the lowest tone that will resonate inx,8j 6m ;wuyah b-8vrv 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 velocitzdia-/iy,sm2 y of sound in ,y s-ia z/m2diair is 340 m/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 temperature ,yf pvbw +re-2(8tkgwis $20 \; ^{\circ}C$. 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 closedwm: wz9-bqy a(gp*k-h 5 f.jlj at one end is 330 Hz. What is the frequency of the third harmoni: 5 lw-*hbgk.(9-y zawf qjpmjc?

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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 shorq5mbktkh d 7o3(-w(z otest pipe closed on one end that will have a fundamental frequency of 60 Hz on a day when the velocity of sound is k5b-toq mwhod k7(3(z340 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 temd*-3zwd;y(bnzam. *.u qh7m hwmv tm 5perature 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 lv y (d g7-+wpcav/0oqj9o0ve 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 speed of s(k *j(9jymv huound in air is 340 m/s. What is the fundamental fr*h ( u(jkvy9jmequency?

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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 thkg.uh ;x+f-xfe same length: one is open and the other is closed on one end. If the fundamental frequency of the ogu .+kx-xhff; pen 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 velocir iaunx 58x *p7l*omfde0f h:7ty of sound is 340 m/s. How much farther back would source 1 have to neamfhl7o*8pi7 u5f*:0d xx rbe 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 sid;m, ek8a-qxx3xege * ne 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 possiblen *ee-g x,m;kxqa8ex3 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 d9irhjf eaa8kw4 o :y:sl4+s3of 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 ex8hugk 83. tk(dozp2frequency of a musical instrument. If the tuner hearto3 k2 k d8.uzgx(h8pes 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 7gi) :gssvt4n5 u 4sa;ur5qy5:h;z aos m respectively. What beat frequency is heard when the horns are sounded on a day when the velocity of sound is 340 m/a ;u)5yg;4s ohs zgt5iv :s4q:nrus5as?

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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 a; 78ndcgo:n6+eb20++wp l zdku toijyre 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 ;b 0 + 7idw 8jldk2oztg+y:pone+u6n cstrings 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 ( c*i9 m591:5a9/moohg yoqwe7 :nv gbfkwibq sound source at twice the speed of sound. The observer hears a freque gw9 m*bcny ohmq/7v5g(eao9i9i: q1k5w: bofncy 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 stationab)ao)jvuy/ e9a 6kml,ry observer at one-half the speed of sound. The om)aly ek)bu 9o v6j/a,bserver 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. Ifzzl o/i0cby 8( a listener moves with a speed of 30 m/s away from the source, what is the frequency heard 8lb0(ciyzo /zby 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-b 64 soij l:9pi1q nsqv*8njk.Hz siren. It is traveling at 35 m/s on a day when the speed of so6qi1.: 8n4jpisvsb*k ol q9nj und 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 observ8luzrv * h9mvj0/2vjl l*b+deer when a train approaches with a speed of 30 m/s. The frequency of the train horn is 600 Hz and the sp hvvl*ml20 jz8l/+br 9e*v ujdeed 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.,9bfo0 hsxax1 The train blows its 400-Hz whistle. Take the speed of sound to b09bs1a ,xfx hoe 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 k2;)piwn dnt zms,;tp7m/h toward a stationary train. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency do you hd7s ptn2mtz;p nw ;,i)ear?

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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 youww naxoq: s03 b :,/evb7ex*vi at 120 km/h. The train blows its 400-Hz whistle. Take the speed of 3i7ew vbo*x:v/xas:e q ,bw 0nsound 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. Itny5flc1cmqc;o,87x c30 brvl blows its whistle, and you hear a tone of 400 Hz. Take the speed of sound to be 340 m/s. What is the acr,y5bxo;v8cn0cl q7fc1c l 3 mtual 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-is*/zbmngvg,) ovp3 speed of sound in air is 340 m/s.vs-vo*giznpb ) 3m ,g/ What is the frequency heard by 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 horn is 500 Hz. Assume :fhpqt6bfy iayg t5q t ;m7- 20ecrl.1the speed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is approaching the train with a s.i7t0hc15ymfr2: ; g btp-ly q6atfqe peed 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-kHe-x * -imy4y-is mx. gh7zo*i+j akof0z signal is sent out, and a 42-kHfhk4*x* x- +a j7gi.-omzsi yio-eym0z signal is returned. 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 thuj l ,vbkl1im. gjc-8gz;)6;p3c xx ve7bs 3one conical 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 f2e 8na/pf au0Mach 1.4. What is the half-angle of the conical shock wave2f/8nu faape 0 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 flig8yn z: vxbruw4;ehoc2f08+t74hzades from the United States to Europe with a Mach number of 1.05 where the aeh y02ba48docfuz ; zhxn+ 8t4grw7v:ir temperature is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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