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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 fr/(.hk tjo (:1 epbf* nxcwxm(alse 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 fotf ae:nr, i*w;fpv) 9astest 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 sound in a steel jn,n (1j2b8r1misuh ozurm4+ 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 oj9 lzbe jow ziw2)08*vf sound? (Assume that all other fact0o)e9zw b 2 i*zljv8jwors 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 velc - n9wm(yg.y x n3x6c9oq*irdocity of a 200 Hz sound through air ydow6 3y9xirm (-xnnc*q.gc9is

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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 wavelength of a 2ym +m): ggza+3a0lo kz00 Hz sound in ai o )z3k0alg:gy++ mzamr 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 20,000 Hz ar z cias51d/x8h9e utkt +eu18qe 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 20 g okxr(x9mip f.+y- 8nHz 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 unif .b5,wdejerl3 *g1tmt1)r*oiq:5c mhfs aog8ormly in all directions. If you move tommq*5fa:s 1, o rgt.htd8l1*gcw)eorj3 ie5b 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, intensity is probwe6qny2g3o-lp ;+ yuk xi)a3portional 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 tv b 3-t:kcrq3x sx631b+jcauwhe intensity at a distance 2d from the sourcerw +ju31x b:-as3xqv6k3bcct ?

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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 is0stgr96q ,w:lr)f1z bd qdl6s radiating equally in all directions. What happens to the intensity of the tdg6l6: sr0b91,sqr z dwqf)lsound? 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 radp/a 4ft80oo/ kappv*ziating equally in all directions. What happensoak4 atp ov0*z/ /fpp8 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 becom y/: do,sm6;r0.(ft cvbkjmu ues 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 towar9 0pb(zo nctmr: 1oa: b3tqx*rd a speaker emitting a pure tone. What characteristic of the s 091p3::zmtracbb*q(t onxroound 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" of a v45ot sp,t)d*u uvxd 5lkhwp85 i1( mgmusical 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 musical note? r* ew*x y5y)5 pyd.y5ft)3vdu 6kaeew

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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 air intv l /*6at 6g.5n tmw+iztvmj.no 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 wavqqa8l6mt : mz8k.-iko es 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 onzzg*javds84d8go/ux .)od -o a guitar string and the sound wave generated by the guitar as a result of this vibration. uj-dz*ozd8g g8o savd4 xo)./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 a9 d-+hz ws+h1xtthwzt9b3w/ y(d7zf tt 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 oyjmpqcy-bpnfj90m h* hc *vh h8 7jw2/g:x+8x f length L. What are the wavelengths of the three lowest tones produced byh*c g09hpjjc:h 8 +2v8m-yxf *njx7wmpbh/ qy 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 o8vb0 a k.*bhnif length L is 200 Hz. Which one of the following frequencies will not resonate in t8.nb vkh0aib *he 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 fundamental fre t b()1nmkua6qauos)::)jid hvr6t j*quency. Which statemen t)ohai j)usb)djr v*6:tn6ua1q (:mkt 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 uf:6py xbzcsj-,jjn jt-12:aone end 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 pipe of length L. What are the wavelengths of gb7n:505 nxwn (xpq sxthe three lowest tones prod5sxx( 5nxnw:pq7 bgn0uced 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)shaekvz,* y5. Which of the follosvk)z a*h,5 eywing 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 fundamental frequencn2u8 0a3 zzdtly. Which szdz8 0nualt 23tatement 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 speakersz;4(mzjobncwa(nnm 8dk 8 a53 driven by the same source. Each speaker produces a tone with a frequency of 200 Hz o4ck bma;za(zo (m8n5w8 jn3dnn 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 w ossy9-vcrv5, aves 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 ando)n;uy-5x ros a particular beat frequency is heard. What happens to the beat frequenr y 5sxouo);-ncy 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 explain:5 q jbaqx ;lm(o6av:bs

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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. Thh 39 z7y*7fl-fyf jfife frequency heard by the observer -*3ff 7z yhy9 ljiff7fis

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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(kudp4fc6- o v from a stationary observer. The frequency heard by the observer pc- fukdo6v( 4is

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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 doub8:h cj;n):pqv;xadji5 jl8 x7kvk o7lle its MACH-speed, its half-angle will decrease by a f p;:k7 in o j5q;vac87jvk)lhjdl:xx8 actor 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. What3x6d4zvt r57q pet5ql is the air temdq 7eq6trxtv43 p5lz5 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;5g +d(agbbxe the speed 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 oe,:ed fhubc4 (f sound in air is 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s later. How far cb4de ue(fh ,: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 echukzkji3 pu 595o 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 teu0 ehrx cc(9:o the lightning strikr9h :0ee xc(cue 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 shp2+bow s(2g 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 laterboc q c,jk(5+j)te/n6e +yowm . How deep is the well? (Ignore air resistance, and ass5j/ o q+o c,wej)cnmbt+ (eyk6ume 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 frequ)hs02uwjez e x.er /u*ency 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 at rgx3q oe;hi2; $23 \; ^{\circ}C$ 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 lil s+2 l5umf:onn nmc ci6 +.ppx6vh-(evel of a sound 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 ambj 4)vmb1 r7+4 ifxva 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 sounds with intensiu :ig7/ qrco3z:sy)h lty levels of 70 dB anq:r 7i sy /3guh:o)lczd 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 is1b w(g.*(jehho a/z 1hn5hv9 2h8po ze-at nrs 100 dB. What is the intensity level generated by otg28heapvhhe-h(ozh(1 9.1jn w o/a 5rb*s nzne 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 sovmj b3s/mviwk63 8m/;ry; xhxurce that is radiating equally in all directions biwhms3k6;m/3 x vv;mrxj/y8is
$6.0 \times 10^{-10} \; W/m^{2}$. 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 equally in-c(tc pi6 o00nq0n.gnw8k py r all directions ir8-ig np6 qc0 .o(wnyknt0c 0ps
$6.0 \times 10^{-10} \; W/m^{2}$. 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 aqfx**3 ns 1mz1.kkq szbout 1 mW of power, which is assumed to be uniformly distributed in all directions. What is the intexk*1mq1znsfqs k *. z3nsity 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 5.00 4*a-nb4opx db m from a barking dog. What would be the intensity level if two idob4bp anx-4 d*entical 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 /ebwx6b ua4n31guug, is 60 dB. What is the intensity level (in dB) at a point 2.0 m from the sogbn,a g14b/e uu6w3xuurce? 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. At whag3s,9jz cy yft(a2w4b9 3e eu:r*x noat distance will it be 75 dB?3a2fo9sere 3wzy:,j g4ytuc a*x b(n 9

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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. --/ r(guslscm What is the frequency ls-c /r-u (msgof the fourth 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 eu2.) sp5 wjvdan open pipe is 900 Hz. What is the length of the pipepd5. e)swju2v ?

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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 d +u-14hxvsjxy0md kv t7 .f)0wiq.d ilength L is 400 Hz. What is the frequency of the lowest tone that will re d .w sd1v.4hjitx0vfy0xk+miu7qd- ) sonate 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 bot7:s6 svz rt6wkh ends has a length of 0.80 m. If the velocity of sound in air is 340 m/s, what is the frequency of the second harmoniw rt6skv 7z:6sc?

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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 temperatucxf4-3ld:p*i hr m1*hz:et le +bqi kh w)f4-yre 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 pip7 i;8la fc)j l2/knorde closed at one end is 330 Hz. What is the frequency of the third ha a 7/rdn;8ocl)ilkj2 frmonic?

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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 o gc7( jcc*1a(xw vg56wc t2p )kztga7have a fundamental frequea6(v1cxj tg 2pw)k 5( go7cz7cwcgta*ncy 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 wher2n;ueop*ei s 9e 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 roo nu9t,md6/:j0ybw6p q ; umktxm 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 when the speed of,vfmau y::ij5wca6ox;gyc(* sound in air is 340 m/s. What is the fundame: my(v;jowaiyu gfac:5 c6x,*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 t9iz00avr4,o k1tjc 4a5vwtg q-+dl )x dvcju2he same length: one is open and the other is closed on one end. If the fundamental frequency of the open pipe is 300 Hz, what is the fundamenvrj dc ,av00d4-+)ut9k 5gjo4x1 qvi wcl2taztal 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 velocity f z wjlm:/y9m+of sound 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 souw z9/jl:my fm+nd?

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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 frequencw si. :tv.i,+ojezrkn5 4rwa -y of 500 Hz. If the dii+w,a ok-t nz.rsev4ri5w : j.stance 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 444 Hz. What is the beapu sb gri.r37.p2n0h gt 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 tunea/ikzy.o 4 u8ent8dl o5q,wz7 the frequency of a musical instrument. If the tuner hears a beat frequency of 2 Hz, what is the f k47uzo,.o z dtewiq8/ la8y5nrequency 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 s5by.khh l fv7/ug:pg 4ounds produced by two horns are 6 m and 7 m respectively. What beat frequency is heard when the horns p:74h u 5hglb/.g yfvkare 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/w s5.u xf+xvkurxq/-mg n u/9 two violins in an orchestra are found to produce a beat freque/w.rxkuxsxv9/u qf +ug/ 5mn- ncy of 2 Hz when a frequency of 660 Hz is played. What percentage change 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 stationary 1000-Hz sound source at twice the; zu wy oym( i.e0es.uti0h6n; speed of sound. The observer hears a freqouyns0 (;tiw.iy e;hm.0u6z euency 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) a3pc: hqpc;o+l 7vrrh 8pproaches a stationary observer at one-half the speed ofoc+ 83 pc:r;hl7pr vhq 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 moves9s 3 lb8k(glmsix a7n* with a speed of 30 m/s away from the source, what is the frequency heard by t n xsm*kl3sg9a8(lib7he 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 on a df rx;k 8dvlz1,z8jm:lay when the speed of sound through air is 340 m/s. The car approaches anzv8 f;1 l:8 rdmkzxl,jd 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,8abrapbl/4pek( +4bdwff. p observer when a train approaches with a speed of 30 m/s. Thebfe ,f.p+/p abbawr4( 4pdlk8 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 blows its 40- ta q:ihxl0o,0-Hz whistle. Take the speed of sound to be 340 m/0oxt,q -hia l: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 kc +u+d jwgdb+7a2 uhg7m/h toward a stationary train. The train blows its 400-Hz whistle. Take the spe+7dw2h7+cud+j u ggabed 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 km/h. The train blows its 400-Hz wif;c t: g1,eaxg)qr:r-dxb fje h8h2:histl fgja: x;c: hr ,eqie1btd2h8: f-)rxge. 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 at8iswa1 ka-uw.pv- 7td 120 km/h. It blows its whistle, and you hear a tone of 400 Hz. s diwt-wa1a-7vpu .8k Take the speed of sound to be 340 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 Hbp;o40qk *dd;gjfr + tlzf hm49 ee;8uz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is mov*0ud +48hemdlkq fzjgprtbfe9 ;o ;;4ing 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 of sou gszu3v 85iqxkv2brb;+0b 1trhy. np-nd in air is 340 m/s. What is the frequency heard by an observer if the observer is approaching the train with a speed of 5+.vgb 3qtb20;brrvs8 n ukz- hx i1yp30.0 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 ktho+n4 8v5 0btwks2u 2fp 0aispeed of an object. A 40-kHz signal is sent out, and a 42-kHz signal is returnik ft0apw4ktou+82bn5v 20s h ed. 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 the conical shock wave produced bymv yflv(xe: /ai10d*y 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 half-angle of ;e/ byt.jiz(-sx , uzvthe conical shock wav,/ v;iszye(x zu-b. jte 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 flies from the United States to Europe with a May lgam4*j1 .vgch number of 1.05 where the air temperaturymg.* 1lj a4gve is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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