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习题练习：IB Physics Homework 1 A0 measurement & uncertainty I (SL & HL)
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 作者: test    总分: 109分  得分: _____________

答题人: 游客未登录  开始时间: 25年09月07日 21:57  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) (组内1/70) 切至整卷模式 搜藏此题  
第 1 题组 (共 70 题 70 分)
  What, approximately, is the percent u+bhe 3)w/zh enj7o/:r3hrj :sro3rx encertainty for the measurement 5.2 mA?

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2#
 
单选题 ( 1.0 分) (组内2/70) 切至整卷模式 搜藏此题  
  How many grams is fort2xu r6p wy,p6v6zt(scy milligrams?

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3#
 
单选题 ( 1.0 分) (组内3/70) 切至整卷模式 搜藏此题  
  A rectangular garden measures 15 m long and 13.7 m ja 4nz.z 1pz) gvn3uc5gf t83xwide. What is the length of a diagonal from onzfnjca85 34 gz x ntz.v)1p3gue corner of the garden to the other?

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4#
 
单选题 ( 1.0 分) (组内4/70) 切至整卷模式 搜藏此题  
  An average human has a h*)du)hewu sr7f 8i lks8u:r7jeart rate of 70 beats per minute. If someone's heart beats at that average rat8*r lwu)787 uidfrhu ): jesske over a 70-yr lifetime, how many times would it beat?

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5#
 
单选题 ( 1.0 分) (组内5/70) 切至整卷模式 搜藏此题  
  The last page of a book is numbered 764.(each sheet is double-sided) The book mye9n e5c:9bl/ xy.ji is 3.00 cm thick. W 9e5ciy l9ne/jy.bx:mhat is the average thickness of a sheet of paper in the book, in centimeters?

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6#
 
单选题 ( 1.0 分) (组内6/70) 切至整卷模式 搜藏此题  
  The mass of an electroj6; sl pf;no(v (wrbm)n is $9.1 \times 10^{-31} \; kg$. How many electrons will make a mass of 1.0 kg?

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7#
 
单选题 ( 1.0 分) (组内7/70) 切至整卷模式 搜藏此题  
  The number of significant figures ih2-rt1w he7 uun 10001 is

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8#
 
单选题 ( 1.0 分) (组内8/70) 切至整卷模式 搜藏此题  
  What is the cosine omf4)h pu 95lijf $55 ^{\circ}$ considering siginficant figures? (use your calculator please)

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9#
 
单选题 ( 1.0 分) (组内9/70) 切至整卷模式 搜藏此题  
  The average density of blood is,+vfbj bcn4f nl3n2bh ll/p 9i +)-dhg $1.06 \times 10^3 \; kg/m^{3}$. If you donate a pint of blood to the Red Cross, what mass of blood have you donated, in grams? ($1 \; pt = 1/2 \; L$, $1 \; L = 1000 \; cm^{3}$.)

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10#
 
单选题 ( 1.0 分) (组内10/70) 切至整卷模式 搜藏此题  
  The average life of an animal is 70 years. As*ka;n5vmhl9q wee6 z0sume one numerical figure, write this in power of ten in secz09 l*wnk;e6v aemh 5qonds.

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11#
 
单选题 ( 1.0 分) (组内11/70) 切至整卷模式 搜藏此题  
  The mass of Mars, $6.40 \times 10^{23} \; kg$, is about one-tenth that of the Earth, and its radius, 3395 km, is about half that of Earth. What is the mean density of Mars in $kg/m^{3}$?

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12#
 
单选题 ( 1.0 分) (组内12/70) 切至整卷模式 搜藏此题  
  Express the following sum with the6dgvsw+8t qv( correct number of significant figures: $1.00 \; kg + 1531 \; g + 2.54 \times 10^{4} \; mg$.

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13#
 
单选题 ( 1.0 分) (组内13/70) 切至整卷模式 搜藏此题  
  The number of significant figures in 0.040 i2; txk ao)n gr 2g v(o2crk5pjp/ozm3.s

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14#
 
单选题 ( 1.0 分) (组内14/70) 切至整卷模式 搜藏此题  
  Express the number 0.02 days using a prefid)0wlwy f:qxv.* tho *.k1ottx.

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15#
 
单选题 ( 1.0 分) (组内15/70) 切至整卷模式 搜藏此题  
  The length and width of a rectangle ayphyjg .rq8,w) 2alq 6re 1.125 m and 0.606 m, respectively. Multiplying, your calculator gives the product as 0.68175. Rounding properly to the correct number of significant figures, tp hlyq. j82yq,ga6w)rhe area should be written as

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16#
 
单选题 ( 1.0 分) (组内16/70) 切至整卷模式 搜藏此题  
  Starting from city A, (sbb8ruk o9;pr t55t ia car drives 250 miles east to city B, then 300 miles north to city C, and finally 700 miles west to city D. 9rrop5 b;itkbt8s(u 5 What is the distance between city A and city D?

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17#
 
单选题 ( 1.0 分) (组内17/70) 切至整卷模式 搜藏此题  
  What is the percent uncertainty in the measuremek etx(slu;qy8 6c5 s22iijgd- nt $2.58 \pm 0.15 \; cm$?

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18#
 
单选题 ( 1.0 分) (组内18/70) 切至整卷模式 搜藏此题  
  What is the result of 68bx2 m hkkidvw)+95dfyni8c$(0.410 + 0.021) \times (2.20 \times 10^3)$ considering significant figures?

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19#
 
单选题 ( 1.0 分) (组内19/70) 切至整卷模式 搜藏此题  
  Select the list which cpw c;o;8 23uj;0 i gmkcnd,7zd t;y0gh8yoavrontains only SI basic units.

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20#
 
单选题 ( 1.0 分) (组内20/70) 切至整卷模式 搜藏此题  
  Concrete is sold by the cubic yard. What is the mass, ins .r +28okjoo ekacvsr2 cr( 4as)ob13 kilograms, of one cubic yard of concrete that is five tims o 8 (2as2a4. bo1j)s+rokrkrcoce3ves as dense as water? ($1 \; m = 1.094 \; yd$, and $1 m^{3}$ of water has a mass of 1,000 kg.)

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21#
 
单选题 ( 1.0 分) (组内21/70) 切至整卷模式 搜藏此题  
  If you are 5 feet 10 inches tall, what i5tzp ak+y 0jk (l1rarzgxbs8-wgdg4y) w0z6 + s your height in meters? ($1 \; in = 2.54 \; cm$)

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22#
 
单选题 ( 1.0 分) (组内22/70) 切至整卷模式 搜藏此题  
  If $1 \; inch = 2.54 \; cm$, how many square centimeters are in 1.00 square inch?

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23#
 
单选题 ( 1.0 分) (组内23/70) 切至整卷模式 搜藏此题  
  What is the sum of $2.67 \; cm + 1.976 \; cm + 2.1 \; cm$ considering significant figures?

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24#
 
单选题 ( 1.0 分) (组内24/70) 切至整卷模式 搜藏此题  
  Which one of the following is not equivq*xntanws)7 e/2o 4zpalent to 2.50 miles? ($1 \; mi = \; 1.609 \; km = 5280 \; ft$, $1 \; ft = 12 \; in$)

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25#
 
单选题 ( 1.0 分) (组内25/70) 切至整卷模式 搜藏此题  
  The metric prefix for hz, teve ;arimr 9, 9*h,zu;td ip)1nione one-hundredth is

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26#
 
单选题 ( 1.0 分) (组内26/70) 切至整卷模式 搜藏此题  
  What is the percent uncertainty in the area of a c5 mt25-ypmuwt ircle whose radius is $1.8 \times 10^{4} \; cm$?

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27#
 
单选题 ( 1.0 分) (组内27/70) 切至整卷模式 搜藏此题  
  The metric prefix for one one-thousak bl63.iex 9findth is

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28#
 
单选题 ( 1.0 分) (组内28/70) 切至整卷模式 搜藏此题  
  Four students measure the mass of an object, each bl8 wm+nus8 1qusing a different scale. They rec qs18mu+8bwnlord their results as follows:
Which student used the most precise scale?
Student Mass (g)
A 49.06
B 49
C 50
D 49.2


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29#
 
单选题 ( 1.0 分) (组内29/70) 切至整卷模式 搜藏此题  
  Which of the following has three significant figuw+u2du4iu4a y3 2sugw res?

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30#
 
单选题 ( 1.0 分) (组内30/70) 切至整卷模式 搜藏此题  
  A large school district has 300 school..2o(v /agbq ki*pwts)iva(o buses. If each school bus is used 3 hours each day, the average speed of the school buses is 15 mi/h, and the fuel economy of the buses is 10 mi/gal. How much does it cost to run these buses in 22 school daybp(i qa .tvg.o) sa*/ koi2v(ws if gasoline costs $1.20 a gallon?

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31#
 
单选题 ( 1.0 分) (组内31/70) 切至整卷模式 搜藏此题  
  What is the area of a rectaor/3(-eumk5zpskf 4 wtmc2/ bngle with dimension $12.56 \; cm$ and $2.12 \; cm$?

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32#
 
单选题 ( 1.0 分) (组内32/70) 切至整卷模式 搜藏此题  
  What is the conversion factor bet;yq+k) zvly:s 5-a3 sfcugss+ween $km/h^2$ and $m/s^2$?

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33#
 
单选题 ( 1.0 分) (组内33/70) 切至整卷模式 搜藏此题  
  Convert $1.2 \times 10^{-3}$ to its decimal notation.

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34#
 
单选题 ( 1.0 分) (组内34/70) 切至整卷模式 搜藏此题  
  The position, x, of an object is given by the )jj1q jl)if3v equation $x = A + Bt +Ct^2$, where $t$ refers to time. What are the dimensions of A, B, and C?

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35#
 
单选题 ( 1.0 分) (组内35/70) 切至整卷模式 搜藏此题  
  Select the smallest va -4o.z(l cuwapl ay:rekw1 02alue.

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36#
 
单选题 ( 1.0 分) (组内36/70) 切至整卷模式 搜藏此题  
  $0.00325 \times 10^{-8} \; cm$ can also be expressed in mm as

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37#
 
单选题 ( 1.0 分) (组内37/70) 切至整卷模式 搜藏此题  
  What is the result of 2.43 divided by 4.561 considering significant figurocd r(z2xmafd3;e.o4es?

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38#
 
单选题 ( 1.0 分) (组内38/70) 切至整卷模式 搜藏此题  
  In the CGS system, what are the fundamental un(oast2h d n)*cits?

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39#
 
单选题 ( 1.0 分) (组内39/70) 切至整卷模式 搜藏此题  
  What is the difference 103.5 Volts and 102.24 Volts if they respectu 0/auu5;rs.6so xamz +kuy;eively representke . 6rams5/sy0;uuxauoz u+; two measurment values of Voltage?

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40#
 
单选题 ( 1.0 分) (组内40/70) 切至整卷模式 搜藏此题  
  The number of significant 5 elpj n,)akx me-4krp :9/wjkfigures in 0.01500 is

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41#
 
单选题 ( 1.0 分) (组内41/70) 切至整卷模式 搜藏此题  
  If $1 \; inch = 2.54 \; cm$, and $1 \; yd = 36 \; in$, how many meters are in 7.00 yd?

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42#
 
单选题 ( 1.0 分) (组内42/70) 切至整卷模式 搜藏此题  
  Write out the numberi-ml23l e7r2cyf8*f l4 xeaqr $8.42 \times 10^{-5}$ in full with a decimal point and correct number of zeros.

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43#
 
单选题 ( 1.0 分) (组内43/70) 切至整卷模式 搜藏此题  
  A hot air balloon rises to an altitude of 600 fathoms. What 0sawkm.s8 m8n ,.yvri is this height, in 8.8sam , .rmiksvy 0wnfeet? ($1 \; fathom = 6 \; ft$)

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44#
 
单选题 ( 1.0 分) (组内44/70) 切至整卷模式 搜藏此题  
  How much longer (percentage) is a 100 m dash thar p*qd 5i9al8+i9zlwjn a 100 yd dash? ($1 \; yd = 0.9146 \; m$)

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45#
 
单选题 ( 1.0 分) (组内45/70) 切至整卷模式 搜藏此题  
  100 mL is equivalent to which of the fols+ouuhpvi3 :a,j,qe,lowing?

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46#
 
单选题 ( 1.0 分) (组内46/70) 切至整卷模式 搜藏此题  
  0.0001776 can also be expressed 227ux(gxg8w 0 ,yoykqy/ a riyas

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47#
 
单选题 ( 1.0 分) (组内47/70) 切至整卷模式 搜藏此题  
  How many meters is sixty kilomet5knzgto + sy(pr,9sk,puj*zrmc 5v5 *ers?

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48#
 
单选题 ( 1.0 分) (组内48/70) 切至整卷模式 搜藏此题  
  Four students measure um) m4. wel.rbthe mass of an object, each using a different scale. They recom.l.brw) mue 4rd their results as follows:
Which student used the least precise scale?
Student Mass (g)
A 49.06
B 49
C 50
D 49.2


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49#
 
单选题 ( 1.0 分) (组内49/70) 切至整卷模式 搜藏此题  
  A rectangle is 3.25 m long and 1.5 m wide. Whv; w262lkt/po4iesl3ni7qh lat is its area?

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50#
 
单选题 ( 1.0 分) (组内50/70) 切至整卷模式 搜藏此题  
  $1 \; angstrom = 10^{-10} \; m$ and $1 \; fermi = 10^{-15} \; m$, what is the relationship between these units?

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51#
 
单选题 ( 1.0 分) (组内51/70) 切至整卷模式 搜藏此题  
  What is the volume, and itsl 3/bpocd+ 3 m qw2uh20d9utxm approximate uncertainty, of a sphere of radius $1.96 \pm 0.01 \; m$?

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52#
 
单选题 ( 1.0 分) (组内52/70) 切至整卷模式 搜藏此题  
  Wall posters are usually sold curled up in ca 1wot.- fus-z u(rr1g;ss9tbylindrical cardboard tubes. If the length of the tube is 84.5 cm, and the diame-f ug; 911wst(tu srr.-sa bozter of the tube is 2.40 cm, what is the area of the poster, in $cm^{2}$? (Assume the poster doesn't overlap itself.)

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53#
 
单选题 ( 1.0 分) (组内53/70) 切至整卷模式 搜藏此题  
  The base SI unit of timd )ncmaq-p3r 1cq+) qge is

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54#
 
单选题 ( 1.0 分) (组内54/70) 切至整卷模式 搜藏此题  
  The length and width of a rectangle are 1.125 x rr5fp 8 yc 67 t;hjvui:wr1(7a(zlczm and 0.606 m, respectively. You calculate the rectangle's perimeter6: ctr pzx8ur yi( 1fw75c h;7v(zjlra by adding these and multiplying by two. Your calculator's display reads 3.462 To the correct number of significant figures, this should be written as

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55#
 
单选题 ( 1.0 分) (组内55/70) 切至整卷模式 搜藏此题  
  The metric prefix for one thousand iwrh4 2k eda iot(j)es75;bm0ns

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56#
 
单选题 ( 1.0 分) (组内56/70) 切至整卷模式 搜藏此题  
  A person stands 35.0 m from a flag pole. With a protractor at eye level, ir1y4d *fv z8jhe finds that the angle at the top of the flag pole makes with the horizontal is 25.0 degdyv4* r1 j8fzirees. How high is the flag pole? (The distance from his feet to his eyes is 1.7 m.)

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57#
 
单选题 ( 1.0 分) (组内57/70) 切至整卷模式 搜藏此题  
  A ball has a radius of 3.23 cm. W w x,(d4us,d2cedp*gvhat is the volume of the ball in $m^{3}$?

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58#
 
单选题 ( 1.0 分) (组内58/70) 切至整卷模式 搜藏此题  
  Which is the largest area?wf9qi o xb/o6,e 56lcz

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59#
 
单选题 ( 1.0 分) (组内59/70) 切至整卷模式 搜藏此题  
  4567.89 is properly expressed in scientific notation asn9gwvod0(tide )8*z) tmfva3

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60#
 
单选题 ( 1.0 分) (组内60/70) 切至整卷模式 搜藏此题  
  The radius of the Earth ir )qej(* c 7b,3mi y8pqxjocf6s 3963 mi. What is the surface area of the Earth in squar cjmqb( fr,ci 7 )3yq*xjoe8p6e meters?
($1 \; mi = 1609 \; m$)

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61#
 
单选题 ( 1.0 分) (组内61/70) 切至整卷模式 搜藏此题  
  A football field is 120 yd long anda.+0zv rw ott) 50 yd wide. What is the area of the footbal. +o0wat)rtzvl field, in $m^{2}$, if $1 \; yd = 91.44 \; cm$?

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62#
 
单选题 ( 1.0 分) (组内62/70) 切至整卷模式 搜藏此题  
  All of the following are base units of the S7u/9 np* 2o hh;ektwszI system except:

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63#
 
单选题 ( 1.0 分) (组内63/70) 切至整卷模式 搜藏此题  
  Write the number 13.5 gigameters as full (decimal) numbers bp)zds k2 qz94with standard units.

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64#
 
单选题 ( 1.0 分) (组内64/70) 切至整卷模式 搜藏此题  
  How many basic units does the SI system hasog/,67ppaju0u j8xmjp0 ) wave?

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65#
 
单选题 ( 1.0 分) (组内65/70) 切至整卷模式 搜藏此题  
  What is the conversion factuh c33w 3uoso4or between $cm^{2}$ and $m^{2}$?

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66#
 
单选题 ( 1.0 分) (组内66/70) 切至整卷模式 搜藏此题  
  How many m/s is $50 \; mi/h$ equivalent to? ($1 \; mi = 1609 \; m$)

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67#
 
单选题 ( 1.0 分) (组内67/70) 切至整卷模式 搜藏此题  
  Write the number 0.00045 in scientific notation (pon -qs5 d:r7(uifdbu:ower of ten notation)

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68#
 
单选题 ( 1.0 分) (组内68/70) 切至整卷模式 搜藏此题  
  A useful method of expressin 6p8h3xkrha,dm j3ij)g very small or very large numbers is

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69#
 
单选题 ( 1.0 分) (组内69/70) 切至整卷模式 搜藏此题  
  A thick-walled metal pipe of length 20.0 cm prg ssb8ba+/. mo mu4oo)-lt( has an inside diameter of 2.00 cm and an outside diameter of 2.40 cm. What is the total surface area oflgb)p(4 rmot-o+ b au 8ss/.mo the pipe, counting the ends, in $cm^{2}$?

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70#
 
单选题 ( 1.0 分) (组内70/70) 切至整卷模式 搜藏此题  
  What is the conversion f6:ru* /rirq; k4kldakgo - uq.actor between $km/h$ and $m/s$?

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71#
 
填空题 ( 1.0 分) (组内1/29) 切至整卷模式 搜藏此题  
第 2 题组 (共 29 题 29 分)
  For an object of mas8/pw 8ad6sb mms $(2.0 \pm 0.1) \mathrm{kg}$, what percentage uncertainty in the velocity will give a $8.4 \%$ uncertainty in the kinetic energy ($KE = \frac{1}{2}mv^2$) ?  (数值) % (do not include the percent sign in your final result)

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72#
 
单选题 ( 1.0 分) (组内2/29) 切至整卷模式 搜藏此题  
  Experimental data has ge+sbbmmq-19 shown that:
$$
P=\frac{g h^2}{u^3}
$$
where $g$ is a constant. If the percentage uncertainties in $h$ and $u$ are $a$ and $b$ respectively, what is the percentage uncertainty in $P ?$

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73#
 
填空题 ( 1.0 分) (组内3/29) 切至整卷模式 搜藏此题  
  The radius of a balloon is measured to be2:qy m-epyoa n56mj w* $28.3 \pm 1.8 \; cm$. What is the percentage uncertainty in the calculated volume of the balloon?  (数值) % (Please exclude the $\%$ symbol with your answer and treat the balloon as a sphere)

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74#
 
填空题 ( 1.0 分) (组内4/29) 切至整卷模式 搜藏此题  
  The period $T$ of oscillation of a pendulum of length $l$ is given by:
$$T=2 \pi \sqrt{\frac{l}{g}} .$$
If the uncertainty in $g$ is $1.2 \%$ and the uncertainty in $l$ is $6.5 \%$, what is the percentage uncertainty in $T$ ?  (数值) % (only fill in numerical value without the % sign.)

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75#
 
填空题 ( 1.0 分) (组内5/29) 切至整卷模式 搜藏此题  
  The lengths of the sides of a rectangular plate are measured, an *v80t0 jnhxy*fi5ipp d the diagram shows the measured values i xf*j0nt yp0v8ph5i*with their uncertainties.

What is the percentage error in the area of the plate?   %. (Remember to exclude the % symbol with your answer.)

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76#
 
单选题 ( 1.0 分) (组内6/29) 切至整卷模式 搜藏此题  
  By averaging three measurements of th,nng1xoaz0p - e same quantity which of the following can be 1apgo- ,nnx 0zreduced?

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77#
 
填空题 ( 1.0 分) (组内7/29) 切至整卷模式 搜藏此题  
  The lengths of the sides of a 2kq( woq bk6vw0qo i;7room are estimated as $10.0 \mathrm{~m}, 4.0 \mathrm{~m}$ and $3.0 \mathrm{~m}$, each with an uncertainty of $\pm 3 \%$. What is the absolute uncertainty in the volume of the room?  (数值)  $m^3$ (Please input value without units and without the $\pm$ symbol)

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78#
 
填空题 ( 1.0 分) (组内8/29) 切至整卷模式 搜藏此题  
  A student measures a length five times. All of the measurements lie between *cb(im .hl: 3fphe1ty$18.8 \mathrm{~cm}$ and $19.2 \mathrm{~cm}$. What should the student quote as the absolute uncertainty in the length? The absolute uncertainty is    $cm$ (Do not include the $\pm$ symbol nor the unit)

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79#
 
单选题 ( 1.0 分) (组内9/29) 切至整卷模式 搜藏此题  
  The time for two events, a,ql9 -v:bhv3px nrfo- and b, are measured to be $(5.1 \pm 0.1)s$ and $(4.9 \pm 0.1)s$ respectively. In which of the following quantities is the fractional(percent) uncertainty the smallest?

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80#
 
填空题 ( 1.0 分) (组内10/29) 切至整卷模式 搜藏此题  
  The density of a solid sphere is measured with per c3z jngo9p x9+gpf6-zcentage uncertainty of 7%. The radius of the sphere is 3.2nf+zj9-xgocp 96 gpz 3 ± 0.2 cm. What is the percentage uncertainty in the mass of the sphere?  (数值) % (Please do not include the % simbol in the blank)

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81#
 
单选题 ( 1.0 分) (组内11/29) 切至整卷模式 搜藏此题  
  The length of a pencil is measured using part ofr fzd4+h .nc8ek0(kyo/xsl x5 a metre rule that is graduated in millimetres, as shown below.+c fky04ekrs8n 5.dh(xlzx/o

What is the length of the pencil?

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82#
 
单选题 ( 1.0 分) (组内12/29) 切至整卷模式 搜藏此题  
  The variation of quantity P as quantity Q varies is plotted. Thee.ljg 1a/g wc4u2e:vbory states that P should vary linearly with Q.1e.vlggbujaew: c/4 2


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83#
 
单选题 ( 1.0 分) (组内13/29) 切至整卷模式 搜藏此题  
  A student measures a distance four times. The readino.k9j0iio ky .gs are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What i9jiy.iko.k o0 s the best estimate of this measurement?

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84#
 
单选题 ( 1.0 分) (组内14/29) 切至整卷模式 搜藏此题  
  A piece of string 9.5 ± 0.1 c8/esz cqxsk ;9m long is cut from a longer piece that is 12.6 ± 0.7 cm long. How long is the remainx/eszsq ; 9kc8ing piece of string?

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85#
 
单选题 ( 1.0 分) (组内15/29) 切至整卷模式 搜藏此题  
  The masses and weights of dl w52x5ek4spm:5 xff wifferent objects are independently measured. The graph is a plot of weight versus mass that includes 5 xk4s5 mw:xwfpe5lf 2error bars.

What do these experimental results suggest?

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86#
 
单选题 ( 1.0 分) (组内16/29) 切至整卷模式 搜藏此题  
  An experiment used to measure the r*h17*me -w om1)pys1 ztavpw acceleration due to gravity produces the following res*pywh*s7 )te11wr1-z ompam vults:
$\begin{array}{llllllllll}7.83 & 6.98 & 7.52 & 8.01 & 7.76 & 7.15 & 6.87 & 7.25 & 8.35 & 7.54\end{array}$
Which of the following statements is true about these data?
Are there random or systematic errors, both, or neither?
(Acceleration due to gravity, $g$, on Earth is usually taken as $9.81 \mathrm{~m} \mathrm{~s}^{-2}$ ).

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87#
 
填空题 ( 1.0 分) (组内17/29) 切至整卷模式 搜藏此题  
  A force of 10.0 ± 1.2 N is memhfk 6464y bapplied to a mass of 2.0 ± 0.10 kg, causing it to accelerate. What is the6yk4 f4hemm6b percentage uncertainty of its acceleration?  (数值) % (do not include the percent sign in your result)

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88#
 
单选题 ( 1.0 分) (组内18/29) 切至整卷模式 搜藏此题  
  The length of a pencil ikt 6e 1(kdyueun1 t 24,ytk)fzs measured using part of a measuring tape as shown below.fty)t4 u6euz1ky(kk ,n e12 td

What is the length of the pencil?

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89#
 
单选题 ( 1.0 分) (组内19/29) 切至整卷模式 搜藏此题  
  A student measures two lengths as follows(xs6xt 1 umht.mg )bj): $$a = (10 \pm 0.1) \; cm$$ $$b = (20 \pm 0.1) \; cm$$
Which of the following quantities has the largest percentage uncertainty?

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90#
 
填空题 ( 1.0 分) (组内20/29) 切至整卷模式 搜藏此题  
  A water tank is the shape of a cube with sides bz x eo4 kcq1c/m.l;+cof $2.30 \mathrm{~m}$. Each side is measured with an uncertainty of $2.1 \%$. What is the absolute uncertainty in the volume of the tank?  (数值)  (Please input value without units and without the $\pm$ symbol)

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91#
 
填空题 ( 1.0 分) (组内21/29) 切至整卷模式 搜藏此题  
  The potential differenc .-bn5/qc+qpa) p mu**m+ jfnj4gsw7hpfkc m/e ($V$) across a resistor is measured with a digital voltmeter to be $0.48 \; V$ . What is the percentage uncertainty in $V^2$ ?  (数值) % (only put numerical values in the blank.)

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92#
 
单选题 ( 1.0 分) (组内22/29) 切至整卷模式 搜藏此题  
  The resistance $R$, and cross-sectional area $A$, of equal lengths of wire are measured at constant temperature and a graph of $R$ against $\frac{1}{A}$ is plotted. Which one of the following graphs would be obtained if $R$ is directly proportional to $\frac{1}{A}$ and if there is a significant systematic error in the measurement of $R ?$
A B

C D

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93#
 
填空题 ( 1.0 分) (组内23/29) 切至整卷模式 搜藏此题  
  A rectangle was drawn using a ruler, such that each measurement has an uncer2 0gykp(d0e5tm qtv s+tainty of t20m5 0dpk+v (te qygs$0.5 \mathrm{~cm} .$

What is the absolute uncertainty in the area of the entire rectangle (i.e. combined small and big rectangles), in $\mathrm{cm}^2$ ?    $cm^2$ (Only input value without units)

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94#
 
填空题 ( 1.0 分) (组内24/29) 切至整卷模式 搜藏此题  
  The volume $V$ of a cone of height $h$ and radius $r$ is given by the expression:
$$V=\frac{\pi r^2 h}{3}$$
In a particular experiment, there is a $6.0 \% $ uncertainty in $V$ and a $1.2 \%$ uncertainty in $r$. What is the percentage uncertainty in $h$ ?  (数值) % (Remember to exclude the $\%$ symbol with your answer)

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95#
 
填空题 ( 1.0 分) (组内25/29) 切至整卷模式 搜藏此题  
  A current of value $I$ flows through a resistor of resistance $R$ and the power dissipated is $I^2 R$. The value of $I$ has an uncertainty of $\pm 3 \%$ and the value of $R$ has an uncertainty of $\pm 8 \%$. What is the percentage uncertainty in the calculated power dissipation?  (数值) % (please input value without the % sign.)

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96#
 
单选题 ( 1.0 分) (组内26/29) 切至整卷模式 搜藏此题  
  An ammeter has a non-negligible zero offset error. Which of the follt;x; 5vpnuh.zxx*ls 2owing statements is corret;p .usvnh5xxz2* ;lxct?

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97#
 
填空题 ( 1.0 分) (组内27/29) 切至整卷模式 搜藏此题  
  A pyramid has a square baner ijzyy,1;qwgtwhp+ er)t)8 j) 82ise of side $x$ and height $h$. The volume $V$ of the pyramid is given by the expression:
$$V=\frac{x^2 h}{3}$$
If $V$ is measured to $3.2 \%$ and $h$ is measured to $5 \%$, what is the percentage uncertainty of $x ?$  (数值) % (Remember to exclude the $\%$ symbol with your answer)

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98#
 
填空题 ( 1.0 分) (组内28/29) 切至整卷模式 搜藏此题  
  A train travels $82.0 \pm 0.7$ meters in $4.697 \pm 0.05$ seconds. What is the absolute uncertainty in its speed?  (数值)  (Please input value without units and without the $\pm$ symbol)

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99#
 
填空题 ( 1.0 分) (组内29/29) 切至整卷模式 搜藏此题  
  The radius of a circle fjgkd3ummq(3q f(ki5bv6 h(h(s0wj/ of wire is measured to be 10.0 ± 1.6 cm.
What is the percentage error in the area of the loop?  (数值) %
What is the percentage error in the circumference of the loop?  (数值) %

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100#
 
单选题 ( 1.0 分) (组内1/10) 切至整卷模式 搜藏此题  
第 3 题组 (共 10 题 10 分)
  What is the value of bmb:vhhg9;7w $\frac{6.3 \mu \mathrm{m} \times 10 \mathrm{GN}}{2.1 \mathrm{~ms}} ?$

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101#
 
单选题 ( 1.0 分) (组内2/10) 切至整卷模式 搜藏此题  
  The volume of the Earth is approx.9o23lu st jjaq7df3dz,f*bv*b/ kz himately $10^{12} \mathrm{~km}^3$ and the volume of a grain of sand is approximately $1 \mathrm{~mm}^3$. To the nearest order of magnitude, if the Earth was hollow, how many grains of sand could it contain?

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102#
 
单选题 ( 1.0 分) (组内3/10) 切至整卷模式 搜藏此题  
  A farmer in Tanzania has an average life expectancy of 62 years. Which of the following is an estimate of his lifetime in seconds?

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103#
 
单选题 ( 1.0 分) (组内4/10) 切至整卷模式 搜藏此题  
  If A=10.0 and B=0.50, which calculation will give the answer with the cbex/z9a0iztj4 f1d+bs/wl* most decimal ixbbs/c f1dz4w +laj z9 *0/teplaces?

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104#
 
单选题 ( 1.0 分) (组内5/10) 切至整卷模式 搜藏此题  
  By approximately how mu+* th9f effp5any powers of ten is the height of a human larger than the height of a g*uf+ep5tff9 h rain of sand?

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105#
 
单选题 ( 1.0 分) (组内6/10) 切至整卷模式 搜藏此题  
  Estimate, to the nearest order of magnitude, the number of heartbeats of an averolh- n6 fn62ia o8yf-lefho0sx9g.1gage adult human in16 6-sgylf 2 an890ioe- xghnlof hof. a day.

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106#
 
单选题 ( 1.0 分) (组内7/10) 切至整卷模式 搜藏此题  
  Which of the following is a fundamdq3af5iok+ i zb5x8s55 tmb+v*w3f wvental unit in the SI system?

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107#
 
单选题 ( 1.0 分) (组内8/10) 切至整卷模式 搜藏此题  
  Which of the followin1hew7/o- *yaoe grm ija/*tm;g contains one fundamental unit and one derived unit?

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108#
 
单选题 ( 1.0 分) (组内9/10) 切至整卷模式 搜藏此题  
  Which of the following could be *41tlkxhe nw6u,9fmv a unit of power?

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109#
 
单选题 ( 1.0 分) (组内10/10) 切至整卷模式 搜藏此题  
  A car has a mass of 1000kg. A mouse has a mass of 10g. Whatyvx/6p ls 2zr8 is the order of magnitude of the ratio between thezr/vx8 ls62 py mass of the car to that of the mouse?

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