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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 w tr ;r,a5la**pnmkj8 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 5tnu7rw2 9k zgfastest 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 l7+f 3ag *opwgdtl2+rsteel 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 v)8hjt8agr5 z6gm 5xvrelocity of sound? (Assume r5xgaj56 8)mvgr hzt8 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 Hyby7wz sz: a.;:aa4l xz sound through air is azw7: xy4s.zbal :ya;

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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 a9 ;p 3fqvvgzr.yrj0go ld )/3w(;eht w 200 Hz sound in air /jgf 3pez3v9.rr ;o)tw0q;gdh(w vyl 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 grex 4pyj zc wy 0zeh;w59skc,7v2ater 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 th:c e1 kr8k5suban 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 df7)nu )lhot365o glqwaves uniformly in all directions. If you move to a point twice as far away from the source, the frequency of the sound willntg6f73)5ldhu lo o)q be

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For spherically divergq *yv:, fauxlx q/0x*yg0,ose ing 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 distance d from the source i0 *y)s)972tt p. mkz+6sojj1rzmtcq ex ef jz4s I. What is the inteo16z 9j0qs)s74. 2kc m zperjtf )mtx+ze*jytnsity 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 a sound source that is radiating equad6mi0 yko tod /4q)2qvlly in all directions. What happen6d/)q ik to0mvqo2 d4ys 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 ) toe 6hk 2rh ea ,cp05ykie9(/ddr,vyis radiating equally in all directions. Whaacdorreey 5ep2/ (yh, k90 t6dhki ),vt 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 as8w)du z*sl9djg 0mn0q 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 arxjbxh) 4hrim:7f0f, i /-j 6niw-v dh pure tone. What characteristic of the sound increasesx- i bv4f:rh r6wh)j /ji mfxn07d,h-i?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What determines "loudnes yhwcrh4 4 9idh1e*8vcs" 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 music*rt)*ulj7y wckuu,r4 vz* m8tal 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 air into wkzz/ t;qn k:(knmrtm g8gd,* cap)f+0ater

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Pressure and displacement wb/aiz;ext 7f 5aves 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 hk( g3cm spcdn1zj*c9lau+1)nrp-l 3qr9y (y generated by the guizs pgyrpd (33- hcnyla(n l9)j1*q cuk 9cm+1rtar as a 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 4 uwftv)ma /+cwhich 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 lengc4tkbw2d:7x9 ) gqepxhux 5f:ga*z -sth L. What are the wavelengths of the three lowest tones produced by*xk qh9:7efb)t- d4auzg2: wxxc p5sg 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 v2 bjwzq*0-5s4( 1bsfheltu q200 Hz. Which one of the following frequencies will not resonav4 zu0q2 b* wfhs-5 qjtlbs1e(te 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 fundamental frequency. Which stat dkbz9s(e, p3w dsv-g6r,yfv (ement is3dsdspk,z- fy 6rb(v,gwv e9 ( 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 end and close oktvrm9,b.ueb ,l;da79n:o9v ko9 x hd 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 wavelenglm.v(. 5tuhaa w8sumy,v3y: /md ls -bths of the three lowest tones producedm, l yv5s/ua.mw mdy( :t.l-bs v38hua 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 resoobko *k6k4 g(gd88nl pnate in a closed pipe of length L is 200 Hz. Which of the following frequencies will not resonate in th8( n6ok g*go4kplb8d kat 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 resonatingmp/ uu8afy4(5jxf / ct at its fundamental frequency. Which statement is4j cu u8 fyx//(a5ftpm 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 speakfa*3p2jldeg2 h9f uq1 3 eji;pers driven by the same source. Each speaker produces a tone with a frequency of 200 Hz on a day when the speed of sound is 330 m/s.g9hf*u a33l p 2e; pefqjj2d1i 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*ja4a2hj w5 (w+el auy 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 freque xc1aa;a (sf:zazt), s b-*wlgncy is heard. What happens to the beat frequency if the frequency of one of the tones is increase gs-b zw xt ;*a:(az,)1calfsad?

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The Doppler shift explaino6mzcc+: zd.7u*yy5 ozlt *yps

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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 obskfzl21(s5 it h92 3sqij8ori cerver. The frequency heard by the observer8it( z l29i5osq3cf hsikr1j2 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 observer. s4m7/ 92erv/rigb0ijz gq3dy The frequency heard by the observerdiqgzy9/gv/ 0ibr34rem js72 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*vkgsozlx8e ,60tv .7ar,jgd its MACH-speed, its half-angle will decrease by a fac7sojav,0 gzk8e6l d,v*rg t .xtor 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. Whatk4l pf.e 7vm4u is the air te lum7fpvk4e .4mperature?

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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 soundgmtdf+ 4dqbp1np:9+m itz /m8u 2 9hje 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 emits a shriek who l+4)7loa itcbse echo reach )alcb 4+toil7es it 0.0250 s later. How far 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 echo in 4.00 s. The temc cct+me*x,zkjc 8,8l8jh s7iperature 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 c)s9gau *e p9lseeing a flash of lightning, the distance to the lightning strik)ae9lpgu*s9c e 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 cli pm5u8.rgols7bg n;6qff 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 wvy,gpl03u .x1i jr1khear the splash 2.5 s later. How deep is the well? (Ignoreuvxi . ygj03l, w1kr1p 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 500 Hz isy65cnju av( xqx,b *7x

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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,sm5jt:2 eig 7nmc c-qb,vrk 9 $23 \; ^{\circ}C$ 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 intensift9 opta +mm.9ty $10^{-3} \; W/m^{2}$?

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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 s(rq+cky6eb/u k3.8k b mku (dgound?

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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 intensma*r .;6no fahity levels of 70 dB and 4oa.;6 hrn*ma f0 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 engiplrzc/ w+6qlmz: , :km(+a,r hgz*iujnes in a garage is 100 dB. What is the intensity lluz*++mzrkr,:, iph l 6g(q:w /acjzmevel generated 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 source that zuafv 76 dc6t30g vrj7is radiating equally in all dia r c6u73f6v0z7gvjtd rections 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*e )syij ry9j n46f9sj equally in all directions )jr* yyejisn 9jsf469is
$6.0 \times 10^{-10} \; W/m^{2}$. 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 to7u yorla6+vsqsx(od/8it1 9 w be uniformly distributed in all dit8x +lu 7avsi6yd 9w qos/ro1(rections. 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 distance 5.00 m from a barkcknrgg-4ior4)rn g94 ing dog. What would be the intensity level if two identical dogs very close to eacn4ognri9r4 4-g)r gk ch 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 l;ere */tjptgq w,i91(j nl(flevel is 60 dB. What is the intensity lev ;t /i1p*lwjg r(q ,n9je(lfteel (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 leve;wo* 4fpau x;sl 5.0 m from a point source is 95 dB. At what distance wauf *4;xps;owill 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. Wh (v-f0 b49qiciqh -npeat is the frequency of the fourth harmonicqb-4-c h0pveq9 if(in?

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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. 8oic97fmueum91m)(suz 3x jz What is the length of the pipecfmi9j31 u8z m)us(m7o9uxze?

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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 pip/* +vmqaj,i(ur 8 atqpe of length L is 400 Hz. What is the frequency of the lowest tone that will r/uj* pa(a+viq 8qmtr ,esonate 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 the velocityt:/93uh 2kmke(g hnp3xq dm6k of soundxhm kpt(gke n/kuqh293:m d63 in air 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 whecw 24stribq3 05ccks;re 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 is 330 Hz. Wh c yh) /w042viy6jyf9baklp7k at is the frequencv7pbkj90i yyhy2a) 46 c/ wlfky 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 v(.9 vd09kxp/zwvvq90nqqxg on one end that will have a fundamental frequency of 60qx. k vgnqz(/9qv0xpv dw0v99 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 w-ro dfi-.sa ;pfkhztfh 1rf mv5: q:31here 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 temperature wzi-vcvrl0o )sxs iqfdtyq8: iex-n,89) 8z- 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 ofacle b 30ic5)j length 0.75 m is played when the speed of sound in air is 340 m/s. What is t 5al)e03bccijhe 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 clo,-ks(ue a3n1emead) q sed on one end. If the fundamental frequency of the open pipe is 300 Hz, what is the fundamental frequency of the closed peeaue ,)da n(ks1 qm3-ipe?

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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 veloi,p/rx 5jn5x eook,bf+ah.q ,city of sound is 340 m/s. n+ oxx5e. qipa k,r5hbo/fj,,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 side and driven e7d n0atz1yqr4- o73 mxajhh9by the same frequency of 500 Hz. If o9j-zh 1ahqn me7r70xa 4ty3d 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.)

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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two tunes have frequencit:.hl z5m2vrc0 inz0w es of 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 tfye8 (z rv(ej/he frequency of a musical instrument. If the tuner he zryf8/((ej evars 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 r)( jt5/g,/whe tjlc6 )ndrz 0*lnacylespectively. What beat frequency is heard when the horns are sounded on a dagjnh5)c 6ntcll ),t j */0adwrl ey(z/y 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 foytt9) b;o bobds2u8, sq c1u8wund to produce a beat frequency of 2 Hz when a1 by;o8tdss2o8 qu), tcbwb9u 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 twju ,px*a*5vo.g9 wh suifqz76cj 1he;ice the speed of sound. The obser; spuwo.av7,h*qeu1jj czf5gxh 96* iver 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 a stationary observer athr/f j5 +8sl cc4 i)ygwtu;h44aiq2nj one-h g+hfwjuit8; hr/c ny4)jalqsc4 i25 4alf the 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 of 1000 Hz. If a listener moves 8hxh/kd38 qtr0 8ociu with a speed of 30 m/s away from the source, what is the frequen3/8krqxu8 od ih80cht cy heard 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 355zgih: gl71hs2su gk 8 m/s on a day when the speed of sound through air is 340 m/s. The car approaches 5l8sui gs hgh72gkz:1and 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 he w ,y o3wjhb(md w*f6 c)p(kd)p30klwmard by a stationary observer when a train approaches with a spd*po(dkmp) ,3l k6()hy fwjb 3wwcmw 0eed 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 toward you at 120 km/h. The train blows its 400-Hz whistli:pig9+cskb. e. Take the speed of sound to be 340 m/s. What frequency do you hearis9bp kg: c+.i?

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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 tra/tsqj 3*7b0on v7 p sue3n/offin. The train blows its 400-Hz whistle. Take the speed of sound to sbqnpu3*nsfoev //o0t73j7f 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 blof +x+x4sim i(0yn1kw0w2i pytws its 400-Hz whistle. Take the speed of sound to be 340 m/s. n+ p40+fsym k1w2iwxix(0 ityWhat 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. It blows its whistle, and you 1* vx)hmu +yn sonl8:whear a tone of 400 Hz. Take the speed of mn :on8hyw )ul*1v +xssound 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 Hz. Assume the speed of sound in air ishjv* *avwo5 h: 340 m/s. What is the frequency heard vw*:ja5 v*oh hby 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 the speed of sounis 2f)ps8am 2*kep;uz d in air is 340 m/s. What is the frequency heard by an observer if the observer is approachin)p mis228f;kz u apes*g 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 object. A 40-kHz signal is suok7w99mk6 lnent out, and a 42-kHz signal is returnkl wu 99kn76omed. 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 coj( lzen1b2:bcfb jfw2 n hqa/5vg0::bnical 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 1.4. What iv ry.fs5cciedh +/ /l7s the half-angle of the conical shock wave formed?d5. cys /fhl/iv+rec7

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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 Mach nugux5 y:req46w a wf7dl0 ,(bcumber of 1.05 where the ar,g uy0l75:u(ewq x4ca6wbfd ir temperature is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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