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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 statement?5bi7qpp9wz- / cvpa*otrae s-9 vj26t

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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 f8dee9 ,olctxrh4 -hka *v,po8 astest 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 a1lk4ut ko:b:6z y iws4 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 jgh.:b8z kj3k+o +my mvelocity of sound? (Assume tk+gjkhmz3+ :8 .jmo byhat 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 sounf9:6zq:eg4j o6a2 btmjfas 8nd, the velocity of a 200 Hz sound through e2q6 j9gftfz6:m 8jnb:saa4oair 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, thesry*+is7x,(jfq hx i6qka)x1 wavelength of a 200 Hz sound in a ixh* qasji) kryx76+1xf(qs, ir 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 20,00f 4fr+n9dy,m a0 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 freque pktb*(u. 01i pg6wie1v zv/qyxc;fd9waj)z.ncy 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 sourt-l l dgiqx/yqyi/+i nclf4 76 ;21ycsce is emitting waves uniformly in all directions. If you move to a point twice as far away from the source, the frequenc- lc2 tl16if qiqindx4+csy/7;/lyyg y 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 pz r:rwf5 )f j.h bekjvjk7q*4;hn6tc(roportional 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 po d(lso; i n+cm-l6i0zgint source at a distance d from the source is I. What is the intensity aig +mzd 0onlls-(c6 i;t 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 rju y 0etv8* .onx61kqis radiating equally in all directions. What happens to the intensity of the sound? 0n uj*tye 1o6qvx.8rkIt 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 fr9sql)qu -7nvl 4tq+*vyuyt1tom a sound source that is radiating equally in all directions. What happens to the intensity level of the sound? It -vn vqy41qu+*ut9tt 7yl)q lsdrops 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 bl6dutil :p9:iecomes 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 g+ 3ryemi 8-eha pure tone. What characteristic of the sound inmi+ ygehr8 3e-creases?

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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 muskhah/ 5jzn68n4e .07w kxx- 9hkvujmqical 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?k 9d9beafcuog c1/o :9

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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 intounc*we0; dm5/my( 4uhd0caxu water

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Pressure and displacemrwdo wi450-zeo nxrv(f :d 33bent 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 wave on a guita.v1.des twuj bip+j5b0t*, bi r string and the sound wave generated by the guitar as a rei.t 5s, bvj 1.dwju*bib0+ etpsult 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 at both ends,qezm voirn) ,ge+.6b; 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 thedv9se lc.:o tn31idn,m(opz- three lowest tones ivps n91,e3-tzmocd( odnl .: produced 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 h0*/vgaaqg;rof length L is 200 Hz. Which one of the following frequencies will not resonatea g*a0g; r/vqh 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.x59j+rtds sth y*g/ ;r)c api is resonating at its fundamental frequency. Which statement is ci)sh +pa s9*cdy; ttxgrr5j./ orrect?

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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 w6 epmdcrdo77 6hich is open 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 of length L. What are the wavelengths of the three;c4a/ x 4elihb lowest tones prodb4h ;/ic4l aexuced 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 H7pqrw( :ezp,th,cky/r k3s.m z. Which of the following frequencies will not wmp,k qrz, ctk3r(/p.e:7y sh 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 1r6*j my aai i.ntk:k)frequency. Which statement is cor6i1)j.:*k mnyar ktia rect?

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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 sameb lb 8khps20nih- +kl; source. Each speaker produces a tone with a f2l0hsk hpb +l-nb8ik;requency 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 7po nmfac5:e*+4afu0*kjk7i - jzpcu sound 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 bef -hr-jby)b 8g3tff- rzyni5 5at frequency is heard. What happens to the beat frrrfgf 58z i -5-jn3t-)ybfybhequency 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 explcpgnm+/e2:ywms 8i 6m77ec/+nq qzw zains

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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 observer4wa6ig -dg )qa. The frequency heard by the obser)4gd -6iaqa wgver 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 statio0 x5fl;9s/smut 8jyc gnary observer. The frequency heard by the observer it0ssug5cf xj 8ly9m ;/s

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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 doubll 6ntp sw/ jyqb3:v;h8w0afo 1e its MACH-speed, its half-angle will decrease by a factor3tav1yb8jnl:6sq ww;o h pf/0 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. Whg:oz 7*.-;slsu njbgot;po j5 (p c.tdat is tj.-cs(5.ndzup:;pt;to ogs *7 jgol bhe air 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 ofr6z pvu, yzy6fh )o:4b 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,/+h(yuv t7mn g a bat emits a shriek whose echo reaches it 0.0250 s later. How far away was the object that reflected back th +/muhvy(n7t ge 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, andmmgf0wp ypiusta+(e ,9i l5 ,) 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 lightnifw,kf7kl u,8b.d( sutb tg5di;+o yl5ng, the distance to the lightninb t;l5g bfs (wtl7 fd,ik,oukd.8u5y+ g 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 the temperh.e5ziru g:e.y0i/n:tb/am; ;arxd5sevw ,j ature 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 intdn+x jz(kr9)vke( y1w et)aiml6uw3:o a deep well and hear the splash 2.5 s later. How deep is the well? (Ignore aired(1t9 iayxwz6m lv w:(3uj) kk re)+n 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 60fxxpo ui)j z q5dgl/f6nt uip+,(2afrequency 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. :y/ q6(iquit c xsp ugw+vs yw5c5lja*6-d8n $23 \; ^{\circ}C$ 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 intdtf er/;5*9 jj-apj rx **tafyensity $10^{-3} \; W/m^{2}$?

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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 n d3 oi +. .lszz9dz.kg1+okca70-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 lemmo 4:2jebu -hy 3,ipzvels of 70 dj,e :ip u3 o-mybh4mz2B and 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 engt89j harrw1 -sines in a garage is 100 dB. What is the intensity level generated by ts98ha1rr- j wone 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 tjxxj xsrz054)i4gx j/ej k+w* hat is radiating equally in all directions i4ij5k0jerjsx zjx xg/w+* 4)xs
$6.0 \times 10^{-10} \; W/m^{2}$. 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 equa1iy ly wzqxcz;5(bo.l4i1-s k lly in all directions4.qz1k; lbyziic15 - swxly(o 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 uniformly7t/fq*l wxe8zv9 s+ vc distributed in all directions. What is t7*+zcxtfvl/9 8qv wsehe 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 dis47/kmznkds.e4u ajck/ h6vko -fo3:v tance 5.00 m from a barking dog. What would be tk knkfokm ujdo3v.46e:h7 c-s/a/ 4zvhe intensity level if 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 the intensi*9xf 7w9hq0pmshztac n t +*+rty level is 60 dB. What is the intensity level (in dB) at a point 2.0 m from the source? As*z+ +fxh 9tp 97n0wmsar*qtch sume 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 whag kzhwx + odh;(pz7 v3.6rb*owt distance willz r;k6+* hv3hd zow.ogxbpw 7( 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 tq6wjx qd)t6la 429vuuone has a frequency of 1200 Hz. What is the frequency ofq x9wu2 da)qtv466jul 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 an open pipe is 900 Hz. Whduqjp,2csb6; at is the length of the pipe,q6pjcd 2bu;s?

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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 ie np in*g 8c-u;os+og;n an open pipe of length L is 400 Hz. What is the frequencn s8o+*nge gi-p u;co;y of the lowest 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 velocity outau:hlg-3v .f sound in air is 340 m/s, what is the frequency of the vt.h:a luu 3g-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 w+ g2jf50lqic:uqf1zwe 1 g saz0/ qit4here 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 isjb:ki;ea +1 gn a pipe closed at one end is 330 Hz. What is the frequency of the thirg;a se1:bkji+d 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,l+5t0 dmxg j(i7qt mv have a fundamentav( 7d,0jlm+ i5mqgtx tl frequency 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 zk/j7/fucsrm tkpg ;d/,*lk2room 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 tem .(j azt)eavs3perature 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 jrzha8r- z( z0when the speed of sound in air is 340 m/za hjr0z-rz (8s. What 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 ope/bsk0 iin- dh,i 0c8/yj*hno:vm yff/n and the other is closed on one end. If the fundamental frequency of the open pipe is 300 Hz, what is the *i kiyvjno,y:s-hcf fd8i0h m0//b/n 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 e6; +gxyb- 6qzo39zjs pkuu l1t lq3s0frequency 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 sources wousts6jzb1lyu+ q9;- kq6 ulo33 eg0pxzld 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 placy rm ,60jpi*cg/s0g2 2bajv pgungu d7a0 9f8hed side by side 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 is a possible the distance from tf ig cjvag8jp*72,gds 60 hgmun/ba p 90r0y2uhe 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 beat frequency7pbvwywn+6o8 ;zka lg9e6 7db?

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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 frek ktsvv9h0xd 2rt- .t-quency of a musical instrument. If the tuner hears a beat frequency of 2 Hz, what is the frequency of thehv 2ktdrx9-s-0v .tkt 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 res1m;h6 ai9 kur5hypcz )pectively. What beat frequency is heard when the horns are sounded on a day when the velocp6 iay)r1c k u;mh5hz9ity 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 viod5 4flk-77cpy v xueb*lin strings on two violins in an orchestra are found to produce a beat fc b57-e*d p ul4kvxy7frequency 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 theo hz)3bq k)p1ij1nuv 8 speed of sound. Thh1juo 3)n8vi 1z kqb)pe 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 gz i wp;d61a0u07 kmlqv :7r.do. yjugof 1000 Hz) approaches a stationary observer at one-half the speed of sound. The observer hears a frequency of; 7w7mydqav. jp6l0iguo0:z g1ukr.d

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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. t3h2eg uqrdehhu y) -.kt1c; a listener moves with a speed of 30 m/s away from the source, what is the frh.y gute-3ed kh t;)2r.c1qhuequency 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 sirenpzc-qoc:5+dhdq0t une ; 1ws 3. 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 standing along the roadside. What change of frequency does the observer hear?w-oz:s0up+ecq5 q1dnhdc t 3;

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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 6fhc4/ qy2v okuy 8mwem-vb:z3wi 5 .ua train approaches with a speed of 30 m/s. The frequency ovz3- m/5cuhvw2:q fu.k4 oi68ebywy mf 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 tr:lsyav (es7jt yu54tn7s ,( ssain blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequel( 5 ,ss ue:sss7yt47yj v(tanncy 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 toward a stationary train. The train blows its 402vo29 n7kibi u(en5ou0-Hz whistle. Take the speed of sound to be 340 m/s. What frequency do you hear? vn22ei kib7ou(9uo5n

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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 m rxc0dbh85:oyou at 120 km/h. The train blows its 400-Hz whistle. Take the speed of sound to bbx85 : chdorm0e 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 its whistle, and you 9h 7t6hp6q qw ,xsrlb1hear a tone of 400 1,h rwqptb9lx7 q h66sHz. 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 the speed of sound in air lg vxs+1ljbr5z;18was m8 v.yis 340 m/s. What is the frequency heard by an observer if the1 wlbax5sj ml18.s8z vg vr;y+ 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 79z5 cmu) fz.8gd(rg5qw dnkcspeed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is approaching the train with a sped7gmrg5 z.cz(9nu)d fq k cw58ed 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 i:e 5n7z znd1pzs sent out, and a 42-kHz signal is returned. Aez p5zn1 :7ndzssume 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 supersonic aircran hq,j5 :a7.--ddzbnapf4huo ft 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 os phk 3+ec:7lcpcc)+r f the conical shock wave foclhck3 c7)+p:eps r +crmed?

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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 Ma, dxgfp.ep3goey7vg)1 u1kl 2ch number of 1.05 whee).gd1lo2g3 gup,v pyf 1kx7ere the air temperature is $5.0 \; ^{\circ}C$. What is the speed of the plane?

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