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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 falsety r ngjjlyutu3:0l ju c:/:6m,xy:t: 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 faa o 9a;masnc567-o dzmstest 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 sounded2 nv, 2+))ytws6bs qr zr/ox 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 air increases, wp n*sao*fz:jnle(b bj3r ,8s1hat happens to the velocity of sound? (Assu8jl,e(n:ra1bopzs f j*n3*s b me 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 wdh*g uet2))o /sc vc8k.s9 qoa 400 Hz sound, the velocity of a 200 Hz sound through air ikd9)ue s wv8*o/2qsht ) cogc.s

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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 souv.ynes.45wll0j anygg;* c+xnd, the wavelength of a 200 Hz sound in nlaw sj*x+ c40l .yev g5n;.ygair 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 frelrhn9 t 3/7fevquencies 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 thacd g2n pp0 ;gg2n.cm;ln 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 unu0el.qyw4ia zn5sdl8 v ;;fm *iformly in all directions. If you move to a point twice as far away from the so zn w0;5vud;ls8a .4flmqiy e*urce, 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, intensity is proportional o::ikl(mbpc2 pj 3 k-2bpbmm wmy91i(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 poinn 79r fq wlrpiseg;jy1jv0r51c5y 2u+ t source at a distance d from the source is I. What is the intensity a5ury j n12q sr15;rv+ gfepjcy0l7wi9 t 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 sg7pqif v)i-q 3t t0zg6ound source that is radiating equally in all directions. What happevtz-3f 7tpq 0)6iqggins 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 l*j2 4/si0a0c sd jyd dyy v*162btzgfeig6)d is radiating equally in all directions. What happens to the intensity level of the sound? Itsydd if 0 ydjbi*l61as4tc6e)vzj 0 y *g/22gd 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 inlbjog-5 8 ek :rv1wd-ncreases 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 pure tone. What character (eke )qn+)p *2gvmfkoistic of the sound increases k)v+* (2efqkngem p)o?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines "loudne5 kqrx2mzx:v a hwqs7nhf0d -1+i)r7gss" 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 musica6out-v5.akiq l 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 ai9bati+gf+ec )b qno5 :r 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 wapr.i:xok9 o;b ves 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 by t+; myc mzk4iy z*xlu-,he guitar as a result of this -* zixcu mly4,;+mykzvibration. 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 i c*v91q-bfvb r k-olyqu:x 16rs 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 bmiu/1h z)i h1are the wavelengths of the three lowest tones produced byh/i h1buzm)1i 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 H+gre7;pt s /czix qxxjq;rxh *0s6(d8z. Which one of the following frequencx8q0ts/ xh*6c;geqs zr;x j7 (prx+idies 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 fundamentalrpt .ador24t2 /axvvui0eze r( w o0)8 frequency. Which statement is c(odtr 8aeet0riwa.zvvr o242x0)u / porrect?

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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, there4z s-8so5iow/ba +vhd

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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 wavelengts ov mtus2 47vw+qq/sjix:k6 3hs of the three lowest tones produced bt7 qouxvv2 4smq w63s/:isjk+y 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 closewj c17hgy0,kt d pipe of length L is 200 Hz. Which of the following frequencies willk w70j gc,t1yh 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 duww) v; 3pm f/axe96rits fundamental frequency. Which statement is correct?wa 3) umx9/ev;w p6dfr

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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 ua0 ; qprw(l tbb.dyp,/ xfx;7the same source. Each speaker produces a tone with a frequency of 200 Hz on a day whe/x0xfqa(. t; pyw bpub l7,r;dn 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 txqal *:2nzw e.lkb(6 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 ec.pfgl31* z3vtq ydrrk,.+ wtogether and a particular beat frequency is heard. Whatp33g +k1ed.w frl .c*tzvy,rq happens to the beat frequency 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 explair.acx7 ry;v1 tns

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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 txt2zrnu* l82vhe observer ivnr* 8xult22z s

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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. The frequency heard by theeik2j nfy 1.mz4 +b7zq o.z7 mbjei+ ynf4zq21k bserver 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 half-angle will decrease bxp r w/-xkz 1v7);ebnuy a zx ); 1xvkbue-n 7/rpwfactor 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. Whf gefqjwzess 7j6 t9hs98 2c/(at is the air tempe 679csejf9s8/s j(htzqwfge 2 rature?

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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 spees v(3gkams+1-aoo t1 rd 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 sounk lotp385 0 nfqvpk9.aw jdf 2:4j5bljd in air is 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s later. How far away was the object that reflec.08f: kvw5 jlo5daf pk 49q b3ltnpjj2ted 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 47kaj2gzb 65 v0r 2ldgh.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 f69en*o2k v sq3m ,wwjglash of lightning, the distance to the lightning strike is 9mq, w 3gs w6n2okejv*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 e g;g1oi3kd 7 j3a/zvea 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 s later. How deep isgm 8hev0g d0 nl ,wr2uh16iyt, the well? (Ignore6 mgyuh8ed0 ,n0h 2,git1rvlw 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 sound wave of frequency 5.+yz;teh fowrh: u:onq,e23v 00 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 1muwv- - x v1beiq(5gmat $23 \; ^{\circ}C$ 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 wi-t0y.awopq m+ ,or*nath 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 ofc4(4.l laugua a 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 so /7yj5x*mgp.rro- ws itxdh1 4 c:obf:unds with intensity levels of 70 dBb:xxi 7s ho-1:o. pj4yg5fr/wdtcmr* 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 intfdbekye5n 6 ak9jr6s,n.tv*4 ensity level a 5*eeyfd 6k.6jtns49 bv,knrgenerated 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 from a souy3u4bwg zjs,v25(h5 -sjan(hy. fli hrce that is radiating equally in all direction3yg. jhwsv 4-j (h (ns5bfu ,za52hylis 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 sour, b.mb5es: modrv4vp3 60dm ibce that is radiating equally in amv ,b 4idrb0.b od5:s3em6pmvll 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 of power,:f/u .s /hcuqp which is assumed to be uniformly distributed in all directions. What is the intensitu/ph u q:/.scfy 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 4cibc+kel*-dkt97c.c 6h7 zvgxic8g 5.00 m from a barking dog. What would be the intensity level if two identical dogs ve 6kc8- c 4i9v.gglkcti*7cbxd z+7c hery 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.omgn / ej,t +ry/r u6fb305nhx What is the intensity level (in dB) at a point 2.0yn/ 5nojtxr+h 0 fgrme63b/u, 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 f9souzmawii)w1yg3*g 2 9(z 2 cgsvvj* rom a point source is 95 dB. At what distance wi wois2 czsj(2wv9*i 9vzg)3gm *uay1 gll 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 frejki,q* w3fawaxf30 f) quency of 1200 Hz. What is the frequency of the fourth k*,)x3wqf3f awjia f0harmonic?

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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 leyw7k *le -kl;qte2l 3ongth of the pipe o3y2k-w7* ;teklq ell?

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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. 3d4er1 qisyf -What is the frequency of the lowest tone df3r1 4yiqe-s 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 mfmh ertqt)(0;5pc6e+fqd g 1 the velocity of sound in air is; 50+ h mqtmeqc)1gpf6de frt( 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 temperatuv+is/k0bmdw t 6g g7e7re 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 end9bkbo.6. trfj4u:j- nfrrel ) is 330 Hz. What is the frequency of the t)rb l. etrkfnrju69 o-4.bj: fhird 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 e4,j jo0tgjili*y10j qnd that will have a fundaijjgo1ijtl *qy40 j,0 mental frequency 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 ,/wx: ab4el.d 3r9rmisc v1qjwhere 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 the temperat+:2./wfr.ereps gq.(e vy) r kezla 2vure 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 ltvj6 nyq ml2w 44n,8ahe6 :qwsength 0.75 m is played when the speed of sound in air is ly wmh844nnqsj626,qvwet: a340 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: one is open and the other is)rv :x fm4+jfj closed on one end. If the fundaj: xv)rf4f jm+mental 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 whegtcbv 3t-syo x0or.)i3g cx).re the velocity of sound is 340 m/s. How much farther back would source 1 r xicxtv-3gs3.g0 t oyo).bc)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 sidm1:lj0g ff4d c 0dty0jpqx02l e 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 speaker? (The sound speed is 340 m/s.) 0 q4dxg1 y mfpj:00l02ljfcdt

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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. Whaqvq64 z*qu+nz t 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 amebaf8zh ;51 s 550-Hz tuning fork to tune the frequency of a musical instrument. If the th815 m;azsbef uner 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 respec9 ry+s bm)3 svsqrc/z(tively.vbs( / qyc3r)z9smr+s What 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 s n.qqce 1ow+)found to produce a beat frequency of 2 Hz when a frequency of 660 Hz is played. What percentage change in q+)o1 ncesqw. 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 twice the -d ,q+trijg qr2uu0:uspeed of sound. The -2u:jugd0turi,+q qr 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 Hzfd (* rxgulyz):3rku ;) approaches a stationary observer at one-half th);rxz(r *3luk yu:fdge 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 o howvy8w5bnobuz.i 9aq(m v2 3 k/1tz0f 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 soundobi 0vn1q 5h9wzyw .mtzv3b/ uo(82ka 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. Il7duyf39n axx s1w9d ;x;w(fp3s v2)lk rhvm.t 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 the roadside. What change o9xuw;;d xah3wsv7pn3yv9(.ml)1lff rsx d2 kf 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 sta ;bjg6qp :8mc8 yc;b2:hvy sno r8bpu-tionary observer when a train approaches with y;mcn us8qc ; p:yhvp8r-b2: oj8 6gbba speed of 30 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 towarpuzl 2sgs:q 01d 88xlsd you at 120 km/h. The train blows its 400-Hz whistle. Take the speed of sound to be 34xgpz2lds1s 0 :q 8sul80 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 stationary train. The train blows its 400-x u n ho4iuntelc l(k::3m5q;*Hz whistle. Take the speeu ;ukl :i 3:*4mtex hqnn(o5lcd 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 fro o):rl6f 5seezm you at 120 km/h. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency defo le)5 6sr:zo 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 yefe3v91dxe( /h. It blows its whistle, and you hear a tone of 400 Hz. Take the speed of sound to be 340 m/s. Wvy9 x3d1f ee(ehat 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 o ohqmq6b:o0c 7lrq2 u4 4sw-ihf sound in air is 340 m/s. What is the frequency heard by an observer if the observer is q4h4- q6u q bls2i:cow0hom7r 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 hyh3q93 ifczsips20/jeg v z47orn is 500 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an obsery9jch/324f 7 zsiesvgq i0z3pver 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 objectekc7n+b6. t ss+kjz t(. 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 objectn.7 tsbjscez+ ( 6kkt+ 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 coe ty6f- /eam2vnical 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 huei;)um8-mc p 6qzk 11.4. What is the half-angle of the conical shock wave formedhe1ik)-;umc 6z8mup q ?

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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 Ma/. * gpdt9kyad6+qs fdch number of 1.05 where the air temperatd pa ty9q/*kf d+d.g6sure is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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