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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 sta b4bdpyu.e0/wtement?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In general, sound isnt/ b a,8evmb2 conducted 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 s,(x sy;luw vr9ound 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, what happens to the velocity of sounyztx.u v -h;p j.2hah9d? (Assume that all other fa 2xp uyht 9jh..vh;z-actors 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 40:q5poq d 2u6bw0 Hz sound, the velocity of a 200 Hz sound through5qw:dpq ubo26 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, thwwew7w,+mkq;y3dd r /oj w/i.e wavelength of a 200 Hz sound in y3wk;wrwdjdeoi/+w,w q / .m7air 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 2k-ifp665j:-pau r.az yy dp- s0,000 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 thas ud gf,h5f1f.n 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 uniformly in all directions. If,94bdn0q vb3fz,xlqj3,9 nva;qia s z you movj ,z qa3bnq049vbx d9f;in alq,vs3 ,ze to a point twice as far away from the source, 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, intensiu r;3qw27dtdk ty 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 1o +x9ic3f*jlw dv*;,cbgccm is the glcc, iow3bcfx* mj1* 9vd;c +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 y,scy0uc (aa)8f g(w uijlp84a sound source that is radiating equally in all directions. What happens to the i8p fgc8w uc (4jy(aal ,i0)uysntensity 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 equally i1wndsr4 1 fxf4e yre39n all directions. What haw314 r 9fye4 xnfde1srppens 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 inc la4u.yw; v6ayreases 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 spnfe i-v;,ep fo.y kow, o(4nu5eaker emitting a pure tone. What characteristic of the sound increasv,5w ny;- ( po e4ufoiknfoe.,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" of a musg6kr 87 f0)shaoei 8)yxtzs.t a0bpn9ical 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 " j;e gk(:h9e k:fzih6apitch" of a 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 :cf f 8*3g41rorn kwm6fr cwb.air 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 displacementg; klidou:a lh3x97s8 waves 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 j2 bs7 :h b1xxft(up63 ioyez7wave on a guitar string and the sound wave generated by the guitar as a result of this vibration. What do these two pt1u37feo2hzbxxiyj s b76:( 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,ke* ;g2u6xk g+a hqw:-ujcmj0 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 wavelengthso .oufmakbd*7;.lq h1 of the three lowest tones produced by this b1;l. ohdu7*mq . faokpipe?

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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. Which one omcavuhq-xcb72htb0(u gm+ 8::xy7 yyf the following frequencies will not resonate in the same pipe? h2h0bb(yv7gx:yc:7 yu t cxmua+-q m8

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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 +)0gmlk/lpy kits fundamental frequency. Which statement is correct?k/k g) m0lp+ly

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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 e-n y ss23h;1m8ok4f e:rk5 n3egtu hpij+f+w 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 the three l; qu0up 0g+f/ l;zomysowest tones producedys;m;qu pf+g0uz/ 0l o 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 closeu/nhzktwf5y1 4y )f5 nd pipe of length L is 200 Hz. Which of the followi k ) 4nyf55nfz1tyh/wung frequencies will 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 fundament b6(i-r m rs37wlm *:.q7iphpecrfq3k al frequency. Which statement is corrii-q7qepmr3rk (rsl hw.:f*7pbc36 mect?

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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 source. Each snh2iudr7iyz2l u0qb6m ( pm 1+peaker produces a tone with a frequency of 200 Hz on a day when the speed of sound is 330 m/s. The persor 2mnp+ y(6z 21dl7iqh0bmiuun 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 sop/0,jfbb.-qe5g nennj x bb)9und 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 particular beat frequency is heard.leg.oc/ ocb8 yld(*)y What happens to the beat frequency if the frequency of one of the tonclg.l) /e bo(o y8y*dces 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 expla/ i c m/+4d j3vectf.y(ltk-rsins

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A sound source approackne;75 -rei - cblrr4w) exhk,s n3+rwhes a stationary observer. The frequency heard by the observer is kr c4bnerlw+7 )k -5ei;e-rx 3snhr,w

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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 the8gib v 9ar+20eex9 rvw observer 2wrb8v+e 9exg vri9a0is

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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, jamnz*e0sr nh a;)0pk j-;mw3its half-angle will decrease by a factor of 3jah0 0enk-p a;m) wjs*zr;mn:

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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 sovchrzm9,dy4 69p(d9cd szc k6und of frequency 45 kHz in air is 352 m/s. What is the air tem dzp6d,vzy d9ccc hs994rk6m (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 sound jr 9b5s5s ;gmyin 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/sree x 09opf1;,zduh9l, a bat emits a shriek whose echo reaches it 0.0250 s later. How far away was the object ep zh;l9of9u1r d0e,x 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 e4t8c p/j q4azicho 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 lightd*;jx)z k00fb tge8 ccning, the distance to the l;fxtkcd*8 cg)00zje bightning 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 thr.jd,n c+8yhf o(,wyle 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 egb 5t7wo7y7pdeep well and hear the splash 2.5 s later. How deep is the well? (Ignore air resistancew75gtyb77oep , 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 s:un /pkx) ebk5ound 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 aa4feomen7qn* + yi-x5/ ) zzsit $23 \; ^{\circ}C$ 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 intensit kvsfb2p6 8 x bnq94 vwrm;(42ccon:lqy $10^{-3} \; W/m^{2}$?

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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 .1hopg-p ( 6pn( wszvfsound?

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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 lev84./ctk .fe j3 (brxujfm3nfsels of 70 dB and 40 cb u3ftk(. frmej84snxj3./ fdB?

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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 l 4n(zoz5fqn1t. g fxug, (k4wa garage is 100 dB. What is the intensity level generated by onezg,x4nn(fz wl.f(15kuo gt q4 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 is radiating equal( ;; (glaqxqc)xvew p(f97tdn w4b(zgly in alla;exz9 (((ql ng pdqgwt)xc47( bw;f v directions 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 ox rf41tk0 8yff6-)iyunimk) radiating equally in all directionftif8m)u46 n 1)ro 0k yf-xkyis 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 deliveo z /3si- pw-pug)b.qcrs about 1 mW of power, which is assumed to be uniformly distributed in all directions. What is the intensity level at a dis.cs ) o3p-/up gbqz-iwtance 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 dista)d7 u((rdhtutqx) l3hnce 5.00 m from a barking dog. What would be the intensity level if two identical dogs very close to each other are barki7 ulr) t3(h(th du)dxqng?

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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 souyy d 6c5)f ctooqv+arqe4;39wnd source the intensity level is 60 dB. What is the intensity levelo r4dfe6yt3v9qayw+)oq5cc ; (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 m from a point source is 95 dB. Alzlmn+v/no j w*nk*1sr)o)+ s t what distance will it be s wjl1om+s*)zov nl /+nn*r)k75 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. What xe wt *vgduv7o474gyu68 y-db dc ag+8is the frequency of the fourth hadg y vtbuao8uw6*y8 e4v7-xd4gcg+7d 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 oquuvwk) jz5,h;h2 k 2wf an open pipe is 900 Hz. What is the lengtvzw52w;q kjh,uuh 2k)h of 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 lenghlskj y4 7e k2u9g;ej*th L is 400 Hz. What is the frequency of the lowest tone that will resonate in an open pipe ofe yk 2lju9k g7h4;e*sj 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 velocity of 40v f yh7dxie33c w/zbsound in air is 340 m/s, what is the frequency of the see43w/ hd vfczy7b i0x3cond 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 /g0j:wc5bpqp : t+qnf k6tp-jin a room where 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 *+a+8s aef:t/yap abfj2 eq65km/y unis 330 Hz. What is the frequency of the thiufftp y /+mneas6jaq82 b/*a+: ak5eyrd 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 fun d)h: kz((mwled8*we; jv;ndf damental frequency of 60 Hz on a day when the;8 whl(;k (j)ez:edwvmf*dn d 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 islfigl4h a7 p4( 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 the tempervpduwdy 4th3 0r v4/.:txey g4ature 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 tz 8jp8 :huef7elc 7i3 ks5-ddvhe speed of sound in air is 340 m/s. hi:fsz jk8e53lcp -78e du7d vWhat 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 o8w a 7nnw0jwr+n(nmd.pen and the other is closed on one end. If the fundamental frequency + w n0(8j.dw7n arnmnwof 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 velocityg k2v3c 3:sre m5k ys;bcj+f9k of sound is 340 m/s. How much farther back would sourc3+kj kscr :5 g2 csfv93ekbm;ye 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 samcm/9xyl9js2zd-1jy rz1 +zv ve frequency of 500 Hz. If the distan2cj- d9/y lxrmz+zz11jv vy9 sce 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.)

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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 /j uau wpwp03cwcs3 w+tx43e;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 tuningz *tl. rm3x5c uelo+64hh y8ub fork to tune the frequency of a musical instrument. If the tuner hearc*8 umo l uhz.3y+er5tlbh64 xs 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 ress4cnl dobs2rii3 t+;sw 1 r*r1pectively. What beat frequency is heard when the horns are sounded on a day when the velocity of sound is 340 m/s?1btsiwd+n;r 14 iro2s lr* c3s

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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 ud58gdx k03zn0o div0on two violins in an orchestra are found to produce a beat frequency of 2 Hz when a frequency of 660 Hz is played. What percentage chxg03dukd o niv 5d800zange in 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 stationavnj+1j .q*e rdwz(kcek ; )+trry 1000-Hz sound source at twice the speed of soce rrvk ;tj.e+ jn w*zq+)dk(1und. 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 1000 Hz) approaches ynj 0p,-4s mxra stationary observer at one-half the speed of sound. n ,jsxmpyr0 4- 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 nd7fw- jvw*b-(m ai1) tjf/kpmoves with a speed of 30 m/s away from the source, what is the frequency heard by the observ7paj*) ni/w dkwfv1b- -( fjmter? (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 si+km vm zti*ca3fud7vfn (4e /(t l4m7nren. It is traveling at 35 m/s on a day when the speed of sound through air is 340 m/s. The car approaches and p i t+ladnf/ vtm3uzf7k *cm4(me7n4(v asses 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 stationaj+,vz2exl .+eldsm 5/fimpu :ry observer when a train approaches with a speed of 30 m/s. The frequency of the train horzl:5px /vde+iumj +l2e.m s,f n 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 c4q(w*sc w676d ok4l6u yeoub120 km/h. The train blows its 400-Hz whistle. Take the speed of sound to be 34074 bw 6kwuo *66cqdu e(c4ylos 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 tgaa1w .4-btvxbk3u pq s+cn )(oward a stationary train. The train blows its 400-Hz whistle. Take thbgkn(+. -qaws43x t va)ubc1pe 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 aty-0tjc6soo2 g p.zs i6 120 km/h. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency do yozs6io 60oytc2- gjp.su 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 youkim(fic qt( j-5g9aa 1w:b8jd at 120 km/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 frequegkjqcwj da b:9fmi((5-18ita ncy 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 50k3;a;tz2dm*l 1 ohjnx0 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer if the obsklj*a13;m to2z dh;nx erver 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 the speed*+ lhcdi-s8 om of sound in air is 340 m/s. Whatc-8 s*olmi +dh 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 obfv.+c31/o d 7ydh q2arkdil; dject. A 40-kHz signal is sent out, and a 42-kHz signal is returned. Assume the speed of sound is 345od rl;ia1 hv d ydk+q3.fc2/d7 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 produced by a superbmvo6 anj6icjj1 w2o6g )4vq:sonic 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 half-angle of the conical :eo vz(, ;)gk zr s89jp oe0scne3xl+kshock wave f8nc)zj:,(0lr e gp ek o ;s9+zoe3xskvormed?

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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 E-;u , *o ni68dohildsburope with a Mach number of 1.05 where the air temperatureb ; i-noi odlh,s6*8du is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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