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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: 游客未登录  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 followiewrzcjf +8jke0 2xym:i01f9 h ng is a false 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 fastestcoqy y5o3z 7brq2ignu:6ga *ig -5xy3 w:rn.k 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 d7w *zt88au d)zfq : 3jwkxgj6steel 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 ir/j*4y*ps ceqsub r8l a ay.0pv*6d8n ncreases, what happens to the velocity of sound? (Assume that all otherv4*dybsuaj86*e pl/crs8. *qany p0 r 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 ve(()*a slqo 0ylbqp6vy53zqgilocity of a 200 Hz sound through air iso p53q6 (v*s yab0q(zql)gily

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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,)6)ohne(j r bl the wavelength of a 200 Hz sound innb jrho)6e( l) air 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 frequyvo)*d /sk6siencies 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 fah,a)f e;gc9xrequency 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 uniformly in all directionr 3qjndiyv -rg/ +r:4fs. If you move to a point twice as far away from the source, the frequency of the sound will bi+yjfq34r v -r rdgn:/e

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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, i 7 danvjc fqn*gmdy404e1(cn 1ntensity 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 poi2us c3q:,es iont source at a distance d from the source is I. What is the intensity at a distano :3siequ2,csce 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 40duzdkd6lng 566ok c a sound source that is radiating equally in all directions. What ha66gduc l65kz nk4od d0ppens 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 is radiating equally in a/f7* z-cv)vkyw1 k z nwl1ljq;ll directions. What happens to the izz)*vq l1nfy;l - wwc7kv1jk/ ntensity 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 becomes lo vovhn ,)*h:ouuder?

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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 ,*muq qb5d-;eu ydy)/tnlqh2pure tone. What characteristic of the sounuqht2-l d ,my y*/)nqued;5b qd 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 musical nymm sb:fbehiyvf crzi 6801;8j y j0/6ote?

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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 - geam/uez; t-n6)pby 8ojv jp(2lf;vmusical 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 a23ke j-t1xvx oir 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 a));oqzzi bqj75 i.x9o jcsf+zre

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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 -ksg i/h. 6zad40peeaa guitar string and the sound wave generated by the guitar as a resuls agehaz i4/ed.-k06pt 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 is open atu5v f4drg 65opt8m wy1 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 are the wavelengths of the three lowesp-c t8jau)2fa2 dvxr;t tones produ8xu va)p -dc;at22fr jced 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. Wh8:p9ye:5vxzodrkro3,p yex )ich one of the following y3 ekx8o)9d:5rov yr,epp :xz frequencies 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 fundamental 38or qvjfx 7ldq:bs3-frequency. Which statement i qv:dr33f-o8l sqj7b xs 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 *ur8 nopblr j6sa5d38open at one 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 ofp91rtqyi;gl /elf4b3ud,wx;kgv7 / j length L. What are the wavelengths of the three lowest tones produced by this pipuqxgrb wp 7i4y tlg/1,/ fj;d9vk3le; e?

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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. Whir32 ankris*9 tch of the following frequencies will n9iak3rs*ntr 2 ot 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 onb; ,uiv+ 24,ne+3a9 ,xxkfsran skthde end is resonating at its fundamental frequency. Which statement is corn is 3,+ , 2btk4hvusakrx +fxe9nd;,arect?

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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 speake8llbxpixz a:5zp 9+y+z9ekpr *8c)ah rs 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/cl 9pkz:xe alp+5988 xa+ r*p)hbzziy 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 shof5nc 3yb :s ;pvce5an(uld 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 au jcqbhlzb6pn7+ t)2xn; *8uc particular beat frequency is heard. What happens to the beat frequency if the frequency of one of the tones is incb7 nz* tp xuchl+njub6q 2;8)creased?

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The Doppler shift expleo3hsly mz2.8sjlv-lv 57pz ;ains

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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 rij5r*e6 mg4 jheard by the observer me5j6*4 grirjis

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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 0m+bwchu) 4am:d e/af heard by the observer )mhf/0+bed4 :a mwuac 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 w bozphm0/ok++ 7wvq9w ill decrease by a factor owow o ++bv0h9k/zpq7mf:

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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 * bp4g3zfn1tg45 kHz in air is 352 m/s. What is the air temperatt41gz* 3ngbp fure?

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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 sp+i c *h*72 in;zeqehdceed 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 emd noe d2ud1hxu 5l,(3pits a shriek whose echo reaches it 0.0250 s later. How far away was the object t(ddoulp2d1x,eu h3n5 hat 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 t;o0a e2s6 80jksusccjhe 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+k *xq 1*yradj/b z7pd after seeing a flash of lightning, the distance to the lightning strike y*d/p+k dqr7jb1a z*xis 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 )2b: xbaafn-t from a 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 spla 6yjxy,l+qqmalw93 sz gg +rvm/( n8i2sh 2.5 s later. How deep is the well? (Igno gq(l8rv/2 qm ysag,y6li9 +w3+mxnjzre 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 Hz2jvd nk7cy (q, 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 ai8viqdkxptk fxs6 .l jt6.u 3/;r at $23 \; ^{\circ}C$ 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 intensittbwe h * 7;pd3/zq:4uroth8 lxbm8pwn+ b w8s6y level 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 a 70-dB sombwd q1m:ns 44und?

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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 +ayl 5fx8(; a +gzb( ibmxwaf0.gbv9jintensity levels of 70 dB and. y+50gz9lbwx v (a8a;b+xfbf(mij ga 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 garag sq udyfik4-.4 h0 m8fvy7l8xze is 100 dB. What is the intensity l4lhi7 muy z- f8dk0.vxsfq84y evel 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 o gu;72 xxqlg1 ):h1c0bfwjcwaf 6.0 m from a source that is radiating equally in all dag1wf 7l;cqjg1c :0ux b 2)xhwirections 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 equal5zb;ry l8ub4z f,nbu8 ly in all direct8fu;yz zln 58bbu,4 brions 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, which is assumed to be uniy/c d .z4wm3ae.c/7w xqbw4uzformly distributed in all directions. Wha3d7z 4 wyqmcw4b.eau/ xc/zw.t 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 ja :(o+v(hx r nn)ht)eeb lw,4barking dog. What would be the intensity level if two identical dogs very close to each other ar,nt h)e4 h:be lr avj()x(+owne 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 ing7; quux djt i e:ajy6q2atwn(mk6.*+tensity level is 60 dB. What is the intensity level (in dB) at a point 2.0 m from the source? Assume that the source radiates equally inwqu (t*u6;2gj ajyd .+nikax:mt6q 7e 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 .zt:tcg 1jeb2 point source is 95 dB. At what distance will :ce21 zbjt.tg 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.9 ghv3(z,ix x 9y+vdkc What is the frequency of thehxv vc3zi, +9dgyx(k 9 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 harmonjnex27tz4thwcbz-zd5q:) p 5ic of an open pipe is 900 Hz. What is the length of the ez5zxtwhqz5p)4 -bdt2nj:c 7 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 reqrz-pbu2 h .ci.qsu +3sonate in an open pipe of length L is 400 Hz. What is the frequency of the lowest tone that will rsu .2+zqhq 3cu i.pb-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 len5e)ibb9lh: lv gth of 0.80 m. If the velocity of sound in air is 3blhvi5l: ) 9eb40 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 n4 h e5mqd +w;;yvg: b6l0hpmv- txy2oa 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 is 330 Hz. Whmcg flp(-e ur bq*01.vat is the frequency of the ebm .1gf rl(*qcpuv0- 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 on one end that will have a funub zodb*l3-n j8almuu;pc4 93damental frequency of 60 Hz on a day when the velocity of sound is 343; cud8 aou*lbp 3j l-bzm94un0 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 room0g:wz8zm0:ulzf j4 x q4raqs8l37lzi 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 iqd0(6t9 5zat98utl-w et lsyl s in a room 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 ewfa,ssr8 571ke0s c xli5l6c speed of sound in air is 340 m/s. What is ts0afl is e5kxsw1 876rcc,le5he 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 swol;m;vu d8d /u wz(+tame 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 fundamental frequency of the closed pipe?odlud( ;wzumt+v8 w ;/

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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 frequencsyrz:bi 2v5d +3yd ko.y of 800 Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved so an observer in front of the sour+:i.zdrd 53b s 2yvyokces 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 andgoj7rakwdk+ .ue+q/2v/z /ab 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.7 k/aw 2/qr d/ekg+o+u zavj.b)

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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 (/lp +ambgm -it2)owq3dt0zhHz. 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 frerqeq6r-+srwo tom1j/g /x7 * dquency of a musical instrument. If the tuer 7gj* -w/6 1qdq xor/so+tmrner 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 ,:e:exyh :a;vux: xe b7 m respectively. What beat frequency is heard when the horns are sounded on a da:e hebuv:,ex ;x:y:a xy 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 ,x6vm8 elzz*hare found to produce a beat frequency zlv x,z8e6 h*mof 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 speed of pp:s0xapr.kb xum:; elhd1.pj2y 4/x sound. The observer hears a frequency b kx.p2jx.pldemhs ap 1r:;/4yu:xp0of

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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 ob6 x;rgic.j7uwh,s m7n+ :0hj5irxjia,voi0 fserver at one-half the speed of sound. The obse:iu0ii,js7 +;hj x0rgji,nv oc.6mrw 7a5xhfrver 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 ji( uveoudx5xo+p 3zqs8 1a1/listener moves with a speed of 30 m/s away from the source, what is the frequency heard by the observer? (Thi (o/ +q1 poz158us jad3xveuxe 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 800ewswn z1 vbom92 2nm5o3li 1w /jv,g0q-Hz siren. 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 passes an observer who is stmwnqvwel5 z22bg3, w1 0i v/1s9mnjooanding 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 observer when a p;q0,eory5-vo i uat5train approaches with a speed of 30 m/s. The frequency of the train horn is 600 Hz and tiou-5rot e,a;v5y0 qphe 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 to4ml 2r ,zlg7la:w5+7 ri plxqnward you at 120 km/h. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency do youglw: lq+ i x,zn7rll24p5 rm7a 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 it cq 0dk,:64f lpdzuaqlb19c 3is 400-Hz whistle. Take the speed of soun:1z c,kq9plaldq 4cb3 uid06f d 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 kmy zazi8b 59x *b9x+,vxup 6xrj/h. The train blows its 400-Hz whistle. Take the speed of 9 xxjz8p 5xxbzi6+9,v aubry *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 at 120 km/h. It blows it)vkzg;6f1yz e1udv 9a s whistle, and you hear a toneavv d u1 g)ykz9;1e6fz of 400 Hz. 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 Hz. Assume txdyvbt) wqmk vyf88q-8ewk q+b3 ;x6: he speed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is m3y: ekf8vv)8y;wx6wb-8qqq x kt +mdboving 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 az*2l(c53i svsh rtr,Hz. Assume the speed of sound in air is 340 m/s. What is the frequenzsrv(i5 ,3*2htrcl sacy 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 object. A 40-kHzul-n9 komw h1s6ui9j 4 signal is sent out, and a 42-kHz signal is ku96nj41hls mou w-9i 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 the conical shock wave produced by a superso(z0x(5hvwnf; /jdpb bnic 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. hh nu7518oita4. What is the half-angle of the conical shock w78itn 5ahu1hoave 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 i/kjxj j2*1cc United States to Europe with a Mach number ok2jj1cxj / *icf 1.05 where the air temperature is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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