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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 statemep3po37zm4 q;bpk7 lu int?

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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 fastest eg0( :-qyblv jmix /2tthrough

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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 b4ydcwv)ty8uzz2:oaud/ w 6 / 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, wh pfhpa.ba 15ly3el,t2at happens to the velocity of sound? (Assume that all other factors remaef13h ba2 .la lypt,p5in 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 velocitb;(,.u6ebk pmwm0 i ix,a i/dry of a 200 Hz sound through a (;r bmx,ap.k0uiew, 6idbmi/ ir 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, the wavelength of a 20:v xpg ey39be)oo2 6gv0 Hz sound in ai:y)e36gpg 9o2v eox bvr 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 grw1z xb snks*cg x4(2g*eater 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 wit;zevno 5+6 qz 25ro;ihig5mys h frequency 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 wajk0u;ec9v hw v);vll8 ves uniformly in all directions. If you move to a point twice as far away from the source, the frequency of the sound wil0; )ecj;v wv8l uhkl9vl 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, intensitm .r8/sw2bq hay 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.2iee2 em6 ff,p What is the intensity at a distance 2d from the source 2fpi6,e meef2?

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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 sy:( q bpr(.uxcound source that is radiating equally in all directions. What happens to the intensity of.ruq :((pbx yc 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 allz b1sd.tqvi5 / dibi.v q/z t51sdrections. What 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 as a sound becomes lo-g8y;ryzdja,r 88fce0t4s7q d hx4 ltuder?

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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 charactfdxb (5l*v )sweristic of the sound increaslfdbvx(5) s w*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 -*scv3;ylo- l yimp (ua 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 "pitcxy fc5)ik 3v,qs)+mhth" 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 air into wat2palkx/enf 116t* p boer

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Pressure and displacement wav-ki fx-cu:ccy - s78e mbgt6z7es 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 by8u bywk0 ;snqj;y7f +m the guitar as a result of this vibration. What do tm qbsyk+w uf8;y07j; nhese 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 o z): n z2vgt;uuk6m*t1fa-a dpyp4l1 gpen 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 are the wavelengths of the th 1d)nsrwn7 cdg(7je l,6ihu(pkj yd 03ree lowest tones produ7undd3)6(j yskgj(e wc7 drnihl , p10ced 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 H4ie: c-2js 09ovrej cbz. Which one of the following frequencies will not res:cs0rj j e-cve b249ioonate 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 funf;.etobhk d9ek8 4f,ndamental frequency. Which statemet9fh8eed n.okb;f k,4 nt 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 on ( nojso9qcah5y,gw n3z./y u3e 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 d. gwldyp1r;h 8 ng+2tthe three lowest tones produced b1prh n g yw.lt8gd+;d2y 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 +z fzm7cbtp u;.q1o6eHz. Which of the following frequencies will not resonate in thaofepmc 6zt;+ bqu17.zt 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 fuw;v- yy,;vq:lhsej6 t l-(jqlndamental frequency. Wh : -,tyq(whsl;yj6lvj l q-;veich statement 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 speakers driven by the sawtsc(eb5*h (a27xfl7 m8lfd4 0zm oj ome source. Each speaker produces 4lajocd2 0zswt 8me(7fox*5(7l m hbf a tone with a frequency of 200 Hz on 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 waves sv.1gpoi4 kch7 hould 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 tod(5g ce q9axc)gether and a particular beat frequency is heard. What happens to the beat frequency if the frequency of one of the tones icxg5e (a9cq)ds 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 exa;4u*(umjcin0l8; jxvlw ho (r5( djsplains

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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 obser/ ,d23/dvzcrl) cp -iknugbr6ver. The frequency heard by the observer i id/ r6 ,kr2b nd)3-glcvuzp/cs

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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 g4 yngxh 2.p5*s 2ycgha stationary observer. The frequency heard by the observer hg5gx yn2 2.syphcg*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 double its MACH-speed, its half-angle v p9+ l9nixa;/)zt qoowill decrease by a factop av9loq/)z nxi9+t;or 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 freqzc6 +nz,4u-p 8jooz;abahqf2uency 45 kHz in air is 352 m/s. What is the air pq no u,h28+aczjoza f4bz-6; temperature?

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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 in z;gu +5 lrrht0oj utn8(oharu c5a-6 5air 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 sodz4ad1 /b zba:m ;jk1lund in air is 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s later. How far a/ab :z4bjka z1;l1ddmway 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, andsrpeg l/1aj(e931f6dmm rgj 4 hear the 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 after seeing a flash of lightning, the distance to cij56u3ehi1 r4su u9uthe lightning strike is about5euu46 i 1 hci9su3rju

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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 yidmox*i659 z 3rn90khhc mm+s 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 int ns5bi4snjcf,gdj2s; d8(t 1ho a deep well and hear the splash 2.5 s later. How deep is the well? (Ignore air resistance, anis n2ndf t;j1,g5s(d hbc4s8jd 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 ai, dal oa 2. whwy.+fhpxeki cw530yt34r of a sound 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 airw )hmdg / p8hiw*-btb05ku ;cz 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 intensity level of a sound with in/(;m.k: +kw a idwyrwntensity $10^{-3} \; W/m^{2}$?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the intensitynwoa *k2sts* 7 t fry83q 4*zc0t0uitk of 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 sounds with intensity 67mjsd*y. t* hpd;mjl,g-xgh levels of 70 dB and 40sdj tyh;*jxg,p.m-hgd6m7 l* 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:dcnaj1y x 6kw bi5g/blh e+3; the intensity level ge;le ixb5jd3:a h+n/y6gc bkw 1nerated 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 tha7zv.b7wp) kh2hl su.y t is radiating equally in all dp2z s).lh7uvhwk 7.by irections 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 from9d ggh003 57g mzzvjcg a source that is radiating equally in all direcvh zg9g0m 5gcdz 730gjtions 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 t dutuq 0zxay(:3;-jilo be uniformly distributed in all directions. What is the intensity level at a distance 5xta(:- uu j;z3li q0dy.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 c k9.d/+ oh0i8unxt judB at a distance 5.00 m from a barking dog. What would be the intensity level i hj cudiu0 /k9.tx8no+f two identical 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 thyx ,jx;h71iqk e intensity level is 60 dB. What is the intensity level (in dB) at a point 2.0 m from the source? Assume that the source rad; yxqk,7 ix1hjiates 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 95nr7p p )1n 1oi92jhyft:iu)sn dB. At what distance will9npy1rn jp2 hf)nts 7i:i1 uo) 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 complena/; 3nrc:ci zx tone has a frequency of 1200 Hz. What is the frequency of the fourth harmonic?i ; n:c/cnar3z

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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 leq+(pp8ewz mvzfs:s q5 12k2m d1:qqspngqmpm2 z sz2wdqk81vsqpe::5qs1 ( +fpth 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 length L is 400 q/6ooq40qsh+u d c)qzHz. What is the frequency of the lou c dqo4/zq o+)6qhs0qwest tone 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 the velov ,0rru+k6lay:avm8/cr 2 dcw rlta( +city of sound in air is 340 m/s, what is the frequency of the second harmonic?6(yarkurltv+lda+/a v28:r c ,0wcmr

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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 xulx)7)6g 3in f0db* 2/dtmtz8qpaqt 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*0qk t 3ms1 v,d2xxunz. What is the frequenquzn3x1d kvt,2s *mx0cy 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 on one end that wi8aq +(hn;ohjvktxg2 0ll have a fundamental frequenhg0t v+n8; ohj kaqx2(cy 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 where the temp. jx ggm42x,l0ul.hfyerature 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 a7ijq *nj6f xmwmvz8ze.q2-. s 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 speed r;.agc ,e);jh4k3izzg mmxk( of sound in air is 340 m/s. What is the fundamental fregj;az. 3i,4xckm )(;z emrkghquency?

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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: onznuugx ;.) a)ce is open and the other is closed on one end. If tcg;)au )n uxz.he fundamental 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 where n9cmh0ui) bn* 5 nm-jlthe velocity of sound is 340 m/s. How much farther back would source 1 have to be moved 0 *m)-5nnbihc9 jn mluso 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 xcdhl . (w4fn9(:ydfll0 x,sa 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 isxy .f 4l fadx0n d:(,cwl9hs(l 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 frequg(*jo bzhfwz/h s,7 -)fpq l4bencies 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 y -ml ie):ei y+5h nmbn0zqz.)tuning fork to tune the frequency of a musical instrument. If the tuner hears a beat frequency of 2 Hz, what is the frequenne0)5el.+ z )bi-q yinz :hmymcy 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 respehry;h0. 2+bmpc a));m oy+e/x z dppgfctively. What beat frequency is heard when the hor oyd;e /gfc 2xy)a0 +m;pbhh+ prpmz.)ns 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 found to ps . xn9kpf xr+ b(ir8mqlo1sm)a6h( 9xroduce a beat frequency of 2 Hz when a frequency of 660 Hz is played. What percentage change in the tension of one of the strings would bring the 9x)m+xosxbrfrs1an9q i86hkp. l(m(m 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-Hk 9: f8u *pi*sex,hzkf*4xsv0,yc c qxz sound source at twice the speed of sound. The observe qh9k izxekfv ,cx *08*suf :4cp,*xsyr 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) p0c0z5ac1t2j1gb cj:ux9z xq approaches a stationary observer at one-half the speed of sound. The observer hea0q2j1z9 ca01 txb u5jccpxz:grs 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 with a speed o kn wh3ftpvr* *x8--srf 30 m/s away from the soufwhp-3 n*sr8rtvkx- * rce, what is the frequency 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 sirg/cz/i6b6s syy 2 w*e( gy(m2r)bjjmgen. It is traveling at 35 m/s on a day when the speed of sound t/b e/csrw*jy6)2g bj(6g my ig 2m(syzhrough air is 340 m/s. The car approaches and 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 obsg6b:49up /( vqok fiwserver when a train approaches with a speed of 30 m/s. The frequency of the train horn is 600 Hqbw 4/f6(gsko ui9 vp:z 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-n fn)h/q:hkotx(v wp6js) d,0-Hz whistle. Take the speed of sound to be 3dqx s(tjkpnv-,) 6w /hnho: f)40 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/py / 8:sjlak;ddf)t r(h toward a stationary train. The train blows its 400-Hz whistle. Take the speed 8kral y/ds(;d): jfpt 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 km7sh*n3 ju9zt1ih hu*q/h. The train blows its 400-Hz whistle. Take the speed of sh3*7tj uz q i9hn1ush*ound 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 d vnj-hw0+sv,ii a 6+d/hdy:k/h. It blows its whistle, and you hear a tone of 400 Hz. Take the speed of sound to be 340 m hv+d-a0jdv:+, hny/w 6sid ki/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. Ass1xx//a61 ixlqt9cbo yyv; 6se ume the speed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is moving away from the train with a speed of 1c1by ; /axivxexs6y9 o6t/ ql30.0 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. Assumx3f4.6 is5ht(we:j:xvz lumd e the speed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is approaching the tf (5v. z d:ihlm4sxu3 w:tj6exrain 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 se9irg55*l7osxa f q( e: *vvlhznt out, and a 42-kHz signal is returned. Assume the speed of sound is 345 m/s. How fast is th x fl:a5o9 riq*h7e(*gvz5 vsle 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 s(bh7ap6.umooe- fxw3: n2ipqupersonic 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 shoq)n*y :o;.;q1r u m e8jnutd 4crc*vnvck wave fon*4j o nc;)t*rnevc8 yuv rq.q:1u;dm rmed?

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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 gkywn- tho dl0:4b*w8United States to Europe with a Mach number of 1.05 where thlw- k g :0dbty4h8own*e air temperature is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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