51fly国际课程 (51fly.win)

 找回密码
 立即注册

手机扫一扫,访问本页面

 

      

上传图片附件

未使用图片

小贴士: 允许的图片文件格式为: gif, jpg, jpeg, png, webp,上传完成后会在上方生成预览,用鼠标连续双击缩略图,或拖动缩略图,该图片就被绑定至本题,显示在题目下方

本次作答已使用

小贴士: 此栏目显示的是当前作答使用的所有图片,绑定到某一题目的图片同时会显示在该题目下方; 删除使用的图片会将其转移到<未使用图片>类别


习题练习:Physics Unit1: Introduction Measurement & Estimating

 作者: physics   总分: 75分  得分: _____________

答题人: 游客未登录  开始时间: 22年07月19日 20:45  切换到: 整卷模式

标记此题
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)
  Four students measure the mass of an objvpj 7ybi:it 4tr 1l,4kect, each using a different scale. They record their results a7 l ptiv44,yjtib:kr1 s follows:
Which student used the least precise scale?
Student Mass (g)
A 49.06
B 49
C 50
D 49.2


参考答案:    

标记此题
2#
 
单选题 ( 1.0 分) (组内2/70) 切至整卷模式 搜藏此题  
  Four students measure the f6-qz,q w*tvkmass of an object, each using a different scale. They record their results as followszqq ,-v*w6k ft:
Which student used the most precise scale?
Student Mass (g)
A 49.06
B 49
C 50
D 49.2


参考答案:    

标记此题
3#
 
单选题 ( 1.0 分) (组内3/70) 切至整卷模式 搜藏此题  
  A useful method of expres 0qhfyj4kj l/5sing very small or very large numbers is

参考答案:    

标记此题
4#
 
单选题 ( 1.0 分) (组内4/70) 切至整卷模式 搜藏此题  
  All of the following are +/mpzm 0wuh/ qbase units of the SI system except:

参考答案:    

标记此题
5#
 
单选题 ( 1.0 分) (组内5/70) 切至整卷模式 搜藏此题  
  Select the list which con8 z *c4kpeiuzb,xfj(gw i-4f 2tains only SI basic units.

参考答案:    

标记此题
6#
 
单选题 ( 1.0 分) (组内6/70) 切至整卷模式 搜藏此题  
  How many basic units does the SI system hav hu.zj3b6/hooe?

参考答案:    

标记此题
7#
 
单选题 ( 1.0 分) (组内7/70) 切至整卷模式 搜藏此题  
  The base SI unit of t/ jg. jr4zp+bsime is

参考答案:    

标记此题
8#
 
单选题 ( 1.0 分) (组内8/70) 切至整卷模式 搜藏此题  
  In the CGS system, what are the f th(y u9gn8fcf3wa*s2o 4rxj6/v-pop undamental units?

参考答案:    

标记此题
9#
 
单选题 ( 1.0 分) (组内9/70) 切至整卷模式 搜藏此题  
  The metric prefix for one one-thouois6 rdz(e db4do*)mw yc .2o/sandth is

参考答案:    

标记此题
10#
 
单选题 ( 1.0 分) (组内10/70) 切至整卷模式 搜藏此题  
  The metric prefix for on1cn -yp+oipg-*us fv 4e one-hundredth is

参考答案:    

标记此题
11#
 
单选题 ( 1.0 分) (组内11/70) 切至整卷模式 搜藏此题  
  The metric prefix for one thousand i, zmudf up.q:-s

参考答案:    

标记此题
12#
 
单选题 ( 1.0 分) (组内12/70) 切至整卷模式 搜藏此题  
  Express the number 0.02 days us5r ,r.wp,ht9 x86agzqxb p :bving a prefix.

参考答案:    

标记此题
13#
 
单选题 ( 1.0 分) (组内13/70) 切至整卷模式 搜藏此题  
  What is the conversion factor between g.ai .hhh. l (po/l5u7bag4tt$km/h$ and $m/s$?

参考答案:    

标记此题
14#
 
单选题 ( 1.0 分) (组内14/70) 切至整卷模式 搜藏此题  
  What is the conversion factor betwflfn*+1s o 7l pkq.k,eeen $km/h^2$ and $m/s^2$?

参考答案:    

标记此题
15#
 
单选题 ( 1.0 分) (组内15/70) 切至整卷模式 搜藏此题  
  What is the conversion0 u71kjlw0 qcf factor between $cm^{2}$ and $m^{2}$?

参考答案:    

标记此题
16#
 
单选题 ( 1.0 分) (组内16/70) 切至整卷模式 搜藏此题  
  The position, x, of an object is givenvf+fg ,*m h+mq by the equation $x = A + Bt +Ct^2$, where $t$ refers to time. What are the dimensions of A, B, and C?

参考答案:    

标记此题
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:pzf,i bv m4t/ the measurement $2.58 \pm 0.15 cm$?

参考答案:    

标记此题
18#
 
单选题 ( 1.0 分) (组内18/70) 切至整卷模式 搜藏此题  
  What, approximately, is the percent uncertainty for the measurement .pgrv 9rmdf1yr+ b:6n5.2?

参考答案:    

标记此题
19#
 
单选题 ( 1.0 分) (组内19/70) 切至整卷模式 搜藏此题  
  What is the percent uncertainty in the area ofqh 7kfr)9brb+ a circle whose radius is $1.8 \times 10^{4} cm$?

参考答案:    

标记此题
20#
 
单选题 ( 1.0 分) (组内20/70) 切至整卷模式 搜藏此题  
  What is the volume, and its approximate unce4yj3h5tw; 5fmvgr -x d5 tl1kortainty, of a sphere of radius $1.96 \pm 0.01 m$?

参考答案:    

标记此题
21#
 
单选题 ( 1.0 分) (组内21/70) 切至整卷模式 搜藏此题  
  The number of significant figures in 1000 *d 5sdpo1- xppjuar,dcj/gi1 +0-wtq1 is

参考答案:    

标记此题
22#
 
单选题 ( 1.0 分) (组内22/70) 切至整卷模式 搜藏此题  
  The number of significant fi;igqy*-obg,yov/ eek(xq+vj:h dr4+z xl+j 9gures in 0.01500 is

参考答案:    

标记此题
23#
 
单选题 ( 1.0 分) (组内23/70) 切至整卷模式 搜藏此题  
  The number of significant figure3i.fnn vhb ,v3s in 0.040 is

参考答案:    

标记此题
24#
 
单选题 ( 1.0 分) (组内24/70) 切至整卷模式 搜藏此题  
  Which of the followiha;) )j8pz yv7ugwdao e+t., tywv(0mng has three significant figures?

参考答案:    

标记此题
25#
 
单选题 ( 1.0 分) (组内25/70) 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?

参考答案:    

标记此题
26#
 
单选题 ( 1.0 分) (组内26/70) 切至整卷模式 搜藏此题  
  What is the difference between 103.5 and 102.23b , htgi0uvk)4?

参考答案:    

标记此题
27#
 
单选题 ( 1.0 分) (组内27/70) 切至整卷模式 搜藏此题  
  What is the area of ao4,c2fh)zt bfz,hb5b rectangle with dimension $12.56 \; cm$ and $2.12 \; cm$?

参考答案:    

标记此题
28#
 
单选题 ( 1.0 分) (组内28/70) 切至整卷模式 搜藏此题  
  What is the result of 2.43 divided by 4.561 considering significagh:u 1,uilw7cl i k:7nnt figures?

参考答案:    

标记此题
29#
 
单选题 ( 1.0 分) (组内29/70) 切至整卷模式 搜藏此题  
  What is the cosine ofnk gct7i-fs)a sep39+)zhx r8 $55 ^{\circ}$?

参考答案:    

标记此题
30#
 
单选题 ( 1.0 分) (组内30/70) 切至整卷模式 搜藏此题  
  The length and width of a rectangle are 1.125 m and 0.606 m, respectively. M:6 u,ek .qj :*qefdqglultiplying, your calculator gives the product as 0.68175. Rou *qu6gq:f q:,e.jlekdnding properly to the correct number of significant figures, the area should be written as

参考答案:    

标记此题
31#
 
单选题 ( 1.0 分) (组内31/70) 切至整卷模式 搜藏此题  
  The length and width of a rectangle are 1.125 m and 0.606 m, respectio+ ikeqi0,67kk lgad3vely. You calculate the rectangle'+ea ii6gkd lk0q3 ko,7s perimeter by adding these and multiplying by two. Your calculator's display reads3.462 To the correct number of significant figures, this should be written as

参考答案:    

标记此题
32#
 
单选题 ( 1.0 分) (组内32/70) 切至整卷模式 搜藏此题  
  A rectangle is 3.25 m long and 1.5q .cc/s0clgwh:no:m,a5tig+buzj /* m wide. What is its area?

参考答案:    

标记此题
33#
 
单选题 ( 1.0 分) (组内33/70) 切至整卷模式 搜藏此题  
  A rectangular garden measures 15 m long and 13.7 m wide. Whaavpin2 ae7 l9(t is the length of a diagonal from one corner o(a la7n9iepv 2f the garden to the other?

参考答案:    

标记此题
34#
 
单选题 ( 1.0 分) (组内34/70) 切至整卷模式 搜藏此题  
  Select the smallest valukbs-xh7i8dj( j /8d fye.

参考答案:    

标记此题
35#
 
单选题 ( 1.0 分) (组内35/70) 切至整卷模式 搜藏此题  
  Write the number 0.00038el *8r9dr :5y mb1cg1qs utq:ths spz-bnh,45 in power of ten notation.

参考答案:    

标记此题
36#
 
单选题 ( 1.0 分) (组内36/70) 切至整卷模式 搜藏此题  
  0.0001776 can also be expr16jndyyug 4i3essed as

参考答案:    

标记此题
37#
 
单选题 ( 1.0 分) (组内37/70) 切至整卷模式 搜藏此题  
  4567.89 is properly exprrgb+cmiuw;vd3h/ r8; essed in scientific notation as

参考答案:    

标记此题
38#
 
单选题 ( 1.0 分) (组内38/70) 切至整卷模式 搜藏此题  
  Convert $1.2 \times 10^{-3}$ to its decimal notation.

参考答案:    

标记此题
39#
 
单选题 ( 1.0 分) (组内39/70) 切至整卷模式 搜藏此题  
  Write out the number tibsn /:q0a mkjs/to)v f1g8/ $8.42 \times 10^{-5}$ in full with a decimal point and correct number of zeros.

参考答案:    

标记此题
40#
 
单选题 ( 1.0 分) (组内40/70) 切至整卷模式 搜藏此题  
  What is the result o+n:l/ll o, *w b-ainntnc9 rh9x8v0 snf $(0.410 + 0.021) \times (2.20 \times 103)$?

参考答案:    

标记此题
41#
 
单选题 ( 1.0 分) (组内41/70) 切至整卷模式 搜藏此题  
  Write the number 13.5 gigameters as full (decimal) numbers with standard unit/ad2:rw;c*3 dvk nyfis.

参考答案:    

标记此题
42#
 
单选题 ( 1.0 分) (组内42/70) 切至整卷模式 搜藏此题  
  100 mL is equivalent to w6 swp+ u:(iietbn ;ax)c)3mxchich of the following?

参考答案:    

标记此题
43#
 
单选题 ( 1.0 分) (组内43/70) 切至整卷模式 搜藏此题  
  How many grams is forty milvgsgc46p:i m01+xypw ligrams?

参考答案:    

标记此题
44#
 
单选题 ( 1.0 分) (组内44/70) 切至整卷模式 搜藏此题  
  How many meters is sixty kilometers?rnb l,rr evl+.2) 8. +k4 voeajof/cyo

参考答案:    

标记此题
45#
 
单选题 ( 1.0 分) (组内45/70) 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?

参考答案:    

标记此题
46#
 
单选题 ( 1.0 分) (组内46/70) 切至整卷模式 搜藏此题  
  $0.00325 \times 10^{-8} \; cm$ can also be expressed in mm as

参考答案:    

标记此题
47#
 
单选题 ( 1.0 分) (组内47/70) 切至整卷模式 搜藏此题  
  Which one of the folloka/rt0q dw,*7fz msbc.v v (t(+r9qnpwing is not equivalent to 2.50 miles? ($1 \; mi = \; 1.609 \; km = 5280 \; ft$, $1 \; ft = 12 \; in$)

参考答案:    

标记此题
48#
 
单选题 ( 1.0 分) (组内48/70) 切至整卷模式 搜藏此题  
  If you are 5 feet 10tns:/ xi/b1 ))xghbhyyn6d r*g v vx-5 inches tall, what is your height in meters? ($1 \; in = 2.54 \; cm$)

参考答案:    

标记此题
49#
 
单选题 ( 1.0 分) (组内49/70) 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?

参考答案:    

标记此题
50#
 
单选题 ( 1.0 分) (组内50/70) 切至整卷模式 搜藏此题  
  A hot air balloon rises to an altitude of 600 f2ouhwo*7thk, -5nx j dwug w**athoms. What is this height, in feet? u*57o*-w jwn* koth,w2hux dg($1 \; fathom = 6 \; ft$)

参考答案:    

标记此题
51#
 
单选题 ( 1.0 分) (组内51/70) 切至整卷模式 搜藏此题  
  The average life of an animal is 70 ye:bdjvkm-70hvf;p4w 16ffs+bf c n9 tbars. Assume one numerical figure, write thi6btfw b0:1+4jhp- 97f;cm fdf ksnbvvs in power of ten in seconds.

参考答案:    

标记此题
52#
 
单选题 ( 1.0 分) (组内52/70) 切至整卷模式 搜藏此题  
  The mass of an electron )17mhzwz-hh 9aa w:ces5 gs7his $9.1 \times 10^{-31} \; kg$. How many electrons will make a mass of 1.0 kg?

参考答案:    

标记此题
53#
 
单选题 ( 1.0 分) (组内53/70) 切至整卷模式 搜藏此题  
  How many m/s is $50 mi/h$ equivalent to? ($1 \; mi = 1609 \; m$)

参考答案:    

标记此题
54#
 
单选题 ( 1.0 分) (组内54/70) 切至整卷模式 搜藏此题  
  How much longer (percentage) is a 100 m dash than a 100 yd s; x3kkj )m:ewdash? ($1 \; yd = 0.9146 \; m$)

参考答案:    

标记此题
55#
 
单选题 ( 1.0 分) (组内55/70) 切至整卷模式 搜藏此题  
  Which is the largest are 1s cg;u2oh7 c1zzhv;na?

参考答案:    

标记此题
56#
 
单选题 ( 1.0 分) (组内56/70) 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?

参考答案:    

标记此题
57#
 
单选题 ( 1.0 分) (组内57/70) 切至整卷模式 搜藏此题  
  Express the following sum with the correct number of significant figf- +p- mvwpj9eures: $1.00 \; kg + 1531 \; g + 2.54 \times 10^{4} \; mg$.

参考答案:    

标记此题
58#
 
单选题 ( 1.0 分) (组内58/70) 切至整卷模式 搜藏此题  
  A football field is 120 yd long and 505-k hoz/.quy ph n2 ./ad4h--xsjglys yd wide. What is the area of the football fixyja-s2 /-.dh gnk5 uy.h4zs/p-loqheld, in $m^{2}$, if $1 yd = 91.44 cm$?

参考答案:    

标记此题
59#
 
单选题 ( 1.0 分) (组内59/70) 切至整卷模式 搜藏此题  
  A ball has a radius of 3.23 cm. What is the volume of tf1xrr m8 g-i* 9lnzkw;he ball in $m^{3}$?

参考答案:    

标记此题
60#
 
单选题 ( 1.0 分) (组内60/70) 切至整卷模式 搜藏此题  
  A thick-walled metal pipe of length 20.0 cm has an inside diameter of 2.00 cmd+ 7 )fzg-(f c4y5k akpl5ikom and an outside diameter of 2.40 cm. What is the total surface area of the k5kf)lozf+m- 5i gdc7ka( py4 pipe, counting the ends, in $m^{2}$?

参考答案:    

标记此题
61#
 
单选题 ( 1.0 分) (组内61/70) 切至整卷模式 搜藏此题  
  The radius of the Earth is 3963 mi. What is the surface area of the Eahj9 fuf6ro+l 8rth in squaro9flh +fjur68e meters?
($1 \; mi = 1609 \; m$)

参考答案:    

标记此题
62#
 
单选题 ( 1.0 分) (组内62/70) 切至整卷模式 搜藏此题  
  The average density of blo 7iuz. st qb38wd6uy9uod is $1.06 \times 103 \; kg/m^{3}$. If you donate a pint of blood to the Red Cross, what mass of blood have you donated, in grams? ($1 \; pt = 1/2 \; L$, $1 \; L = 1000 \; cm^{3}$.)

参考答案:    

标记此题
63#
 
单选题 ( 1.0 分) (组内63/70) 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/$m^{3}$?

参考答案:    

标记此题
64#
 
单选题 ( 1.0 分) (组内64/70) 切至整卷模式 搜藏此题  
  Concrete is sold by the cubic yard. What is the mass, in kilograms, of one cu bae35+m z./ 1cateqhpbic yard of concrete tme3bt c5qa +e.z/p1ha hat is five times as dense as water? ($1 \; m = 1.094 \; yd$, and $1 m^{3}$ of water has a mass of 1,000 kg.)

参考答案:    

标记此题
65#
 
单选题 ( 1.0 分) (组内65/70) 切至整卷模式 搜藏此题  
  An average human has a heart rate of 70 beats per minute. pxoum -at)05 pl:j8gaIf someone's heart beats at that average rate over a 70-yr lifetime, how many times wo8ulx-at5agpm :o pj) 0uld it beat?

参考答案:    

标记此题
66#
 
单选题 ( 1.0 分) (组内66/70) 切至整卷模式 搜藏此题  
  A large school district has 300 ds lcse 5k-d 2* eu2tsgv6vy6,school buses. If each school bus is used 3 hours each d kvse t,sv g2d6*2ucd6l 5s-eyay, 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 days if gasoline costs $1.20 a gallon?

参考答案:    

标记此题
67#
 
单选题 ( 1.0 分) (组内67/70) 切至整卷模式 搜藏此题  
  A person stands 35.0 m frvg4 vqnkzq d)/gb0r.lbvw4a9m2 +ot zx 2i,( wom a flag pole. With a protractor at eye level, he finds that g( bw .4 ,qkb/4qzitvaz2l)+xo w9vvd 0 rn2mgthe angle at the top of the flag pole makes with the horizontal is 25.0 degrees. How high is the flag pole? (The distance from his feet to his eyes is 1.7 m.)

参考答案:    

标记此题
68#
 
单选题 ( 1.0 分) (组内68/70) 切至整卷模式 搜藏此题  
  Starting from city A, a car drives 250 miles east to city+ih b59a i+t*9atj1dywin9y s B, then 300 miles north to city C, and finally 700 miles west to city D. What is the distance betww+iajbt d9y 5ai*hytsin +199een city A and city D?

参考答案:    

标记此题
69#
 
单选题 ( 1.0 分) (组内69/70) 切至整卷模式 搜藏此题  
  The last page of a book is numbered 764. The book is 3.00 cm .jz6s* kurc 21u ,ruwpthick. What is the average thickness of a sheet of paper in the bo 1.j*ukwuzpr, 62suc rok, in centimeters?

参考答案:    

标记此题
70#
 
单选题 ( 1.0 分) (组内70/70) 切至整卷模式 搜藏此题  
  Wall posters are usualql wm(bcdtj553 ry+zbr ;v)5bly sold curled up in cylindrical cardboard tubes. If the length of the tube is 84.5 cm, and the diameter of the tube is 2.40 cm, what is the arej 5b;3qb 5m5rr(z+lydtw cv)ba of the poster, in $cm^{2}$? (Assume the poster doesn't overlap itself.)

参考答案:    

标记此题
71#
 
填空题 ( 1.0 分) (组内1/5) 切至整卷模式 搜藏此题  
第 2 题组 (共 5 题 5 分)
  How many significant figures do eac;:u* he8ag hbtww5 f)sh of the following numbers have: (a) 214   , (b) 81.60  , (c) 7.03  , (d) 0.03  , (e) 0.0086  , (f) 3236  , and (g) 8700  

参考答案:    

标记此题
72#
 
填空题 ( 1.0 分) (组内2/5) 切至整卷模式 搜藏此题  
  Add $9.2 \times 10^3s + 8.3 \times 10^4s + 0.008 \times 10^6s$ =   $\times 10^5s$

参考答案:    

标记此题
73#
 
填空题 ( 1.0 分) (组内3/5) 切至整卷模式 搜藏此题  
  Express the following sum wik-qyy(htaj -/az; p f)th the correct number of significant figures: $1.80 \; m + 142.5 \; cm + 5.34 \times 10^5 \; \mu m$ =    $\times 10^2 \; m$

参考答案:    

标记此题
74#
 
填空题 ( 1.0 分) (组内4/5) 切至整卷模式 搜藏此题  
  Determine the conversion facty2xa ,8ub .q0tq 1onsqlo/g9k or between
(a) $1km/day$ =    $mi/h$ given that $1 \; mile = 1609 \; m$
(b) $1m/s$ =    $ft/min$ given that $1 \; m = 3.28 \; feet$
(c) $1km/h$ =    $m/s$

参考答案:    

标记此题
75#
 
填空题 ( 1.0 分) (组内5/5) 切至整卷模式 搜藏此题  
  A light-year is the dist-3tq6iwx v2o qance light travels in one year (at speed = $2.998 \times 10^8 \; m$).
(a) How many meters are there in 1.00 light-year?    $\times 10^{15}$
(b) An astronomical unit (AU) is the average distance from the Sun to Earth, $1.50 \times 10^8 \; km$. How many AU are there in 1.00 light-year?   $\times 10^{4}$

参考答案:    

总分:75分 及格:45分 时间:不限时
未答题: 已答题:0 答错题:
当前第 题,此次习题练习共有 75 道题

浏览记录|手机版视频|手机版试卷|使用帮助|51fly国际课程 (https://51fly.win)

GMT+8, 2025-11-5 11:02 , Processed in 0.528275 second(s), 197 queries , Redis On.