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 object, each using a different s jcunn n(0zl4 zih518acale. They record their results as follo0lzhi4n5a( z18cnuj n ws:
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 th rfk04nf+qg:pe mass of an object, each using a different scale. They record theirnk+0p qgff4 r: results as follows:
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 expressing very small or very large numberl0g)x)6xct lde *o lw*s 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 base unityy j o9 nb2n+p8mus,b)p2 (iczs 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 contains only SI baulm s2xi.1e v,qb5bq4 sic 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 dk7o kav1k 2lig5(c0 zqoes the SI system have?

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 tqr( ob 0s6(mywg-nqe3 ime 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 fundamental mmcgew::o7-t6f cqc : 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-th. -xne+3u/fo7g0qule , befx 49htwavousandth 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 one one-hund.o6m f9pu stq:redth 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 is( n-p +7jm fusg9qtflzf)m3( y

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 using tmvdwq7z5u9e6f n ; xc m6u//ia 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 betweenu1mw+*p)r xux5 egfhipp 938r $km/h$ 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 conversiont1d s0*n9b ljqz +n*un factor between $km/h^2$ 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 conversion factor njzg 6 jwa:y,bgpdyz47m -d)+xu5 gr;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 give pgn7e hpfqd-5: )k4evz7i9u*vsux.y n 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 inwg8fav a kfpbu 8,e5j1w y5j1skiy2* 6 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 measure.lzg(ybh 7 y0ument 5.2?

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 of a cip 648-zmo yqj fwgz,.o. i5rccrcle 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 uncertainty, of a sphere of 0p4,)e8 sx4whim xbx hor7(kiradius $1.96 \pm 0.01 m$?

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 fi fzxumy77qhde384 yt.h*(wyv gures in 10001 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 figures in 0.015,p qv)lr2ymjzk;0v f *00 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 significantp i:jm5o f8 jt*n/eqwvlk/+y6 5bd kn4 figures 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 following has5; b f4a pese7,na+mcsy: u4qd 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 102.2g3 km ,og5k:qy4?

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 a rectangle with dr u70zucm0tl4imension $12.56 \; cm$ 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 divibj2 er6l:6 nodded by 4.561 considering significant 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 of tayr25 x nb*0o$55 ^{\circ}$?

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, respectiya tq1oq26/i5juv .irvely. Multiplying, your calculator giri/ aqq tv 5yo1i6ju2.ves the product as 0.68175. Rounding 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, respe x8tmihi.98gn f0)jtectively. You calculate the rectangle's perimeter by adding these hx. min)0 8jg8eit9 tfand 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 1.5 m wide. Wdwg0r*zaasb a5/3n:z tih8z( hat 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. What is the le*ur afvf /h vbs+f p+lmlf-595ngth of a diagonal from one corner of the garden tfl+hfup55-rfvv*+ mb9/ lfs ao 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 wvus xxyhg5 dr:j on(lr92*p* bjbc m2e *4,-cvalue.

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 0.00045 i .abs23n/6f74oldkzxfkyb; h n 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 expre 4y1z o*8,p q3tfic*u)g jmk,l.xjzcgssed 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 expressen0l q0xsyt146d3: e5j krfdu md 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 numbers2 xvb01u*mg fru--sf $8.42 \times 10^{-5}$ 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 oub3vv) nwgin5u ss:-9f $(0.410 + 0.021) \times (2.20 \times 103)$?

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 fullc r4t xvx:qp*hf fa;7f4 0yc3o (decimal) numbers with standard units.

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 which of the following d)k8sjnrfvry.4 ( y 8) ia(lu*n od5u(jjh/vv?

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 forao bolg3e9nq: *xru( r1 m9j3uty milligrams?

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 kilometez74* fqnphsquy 7*;g frs?

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 following ou.s fz57r:a n uueh0h+a2xm0is 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 10 inches tall, what is your heightyr; (ely.nz1wga,9 e0vu/m kt 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 fathoms. What is this height, )u)d*d*m ;c igbn5hb min feet?i)b cmnddb* )u*; h5mg ($1 \; fathom = 6 \; ft$)

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 years. Assume one numerical figure, write txgp .6 py:9 :3mbr;m7jtnnf tka 095hwrb6 jmnhis in power of ten in secbrg6j 6jf9;btnpa m k hw97 3nn:t0.: y5rpmxmonds.

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 electea8m+ori clcv72v5 p. ron is $9.1 \times 10^{-31} \; kg$. 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)bhr2qfw s2 at4 row+29 is a 100 m dash than a 100 yd dash? ($1 \; yd = 0.9146 \; m$)

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 ar w ,t s;s)xe):r/n4*biv9adfb2qp hse ea?

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 figures: rz/p r).nk ovo 3jphcu-60-w;zmex2l $1.00 \; kg + 1531 \; g + 2.54 \times 10^{4} \; mg$.

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 50 yd wide. What is the 0h*8 irw)p qua)qe*(wqap ymfj en;77 area of the football 7hpemq*(7ae )p qj0iq rwf aw )n8*yu;field, 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 the m3w 7mua-ro8g,yei,q3d+ l he0e(acu/g nd*tball 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 o .mrf7giw8 yz x l8,3vi)fi:ncf 2.00 cm and an outside diameter of 2.40 cm. What is the total surface area of the pipe, counting the ends, in8nviixizwlg8m 3) 7 f,y:.crf $m^{2}$?

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 th3r eip+y*yf7 ne Earth in square mene7iy r 3fpy*+ters?
($1 \; mi = 1609 \; m$)

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 blood i( ls(d0aoe82a o2ky*j :unm gts $1.06 \times 103 \; kg/m^{3}$. 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 thdl0lypsh/w -kf qfwh)t(b :-:e cubic yard. What is the mass, in kilograms, of one cubic yard of 0-lwsfk-wdp /ty h:)lbfh( : qconcrete that 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 kbaikz-f7.ut -acj9 4rate of 70 beats per minute. If someone's heart beats at that average rate over a 70-yr lifetime, how many times .cjaka-u z7ti kfb9 -4would 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 schoottlbl :b:6w,g l 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 muwb tl:6gb, lt:ch 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 from a flag pole. With a protractv 9*1khae ppr*or at eye level, he finda1v9r kh **peps that the 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 B, bo1a ;wji; tug,6(mpu 1:vydk then 300 miles north to city C, and finally 700 miles west to city D. What is the distance betwe dgyj( wv kt1m;1p buo6i:,a;uen 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 th9d))h jsqb 0 bxbwi84-0lnuxzick. What is the average thickness of a sheet of paper in the book, in cen0- nuhwq40j9 )i 8dl)bxsbzbxtimeters?

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 usually sold curled up in cylindrical ca;qpp)ep7nx hhz ft9jv8sl9 22em2t l4rdboard tubes. If the length of the tube is )phq4me 2he; 28px2 97snl9p tzvljtf84.5 cm, and the diameter of the tube is 2.40 cm, what is the area 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 ea7dr hc;u5e ;fyzce*3h:d mr 6vch 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 with the correct a*m 3- e0u/:. c vexkt.losromnumber 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 facs 6p+,wby;3vn/d j br fxy0bi;tor 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 distance light travels in one year (at speed 1b2wyir q4 ep8= $2.998 \times 10^8 \; m$).
(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
本平台(https://51fly.win/)支持练习,作业与考试(自动评分)三种模式,群组成绩统计排序导出,题目动态变量实现同卷千人千题
如果您对本系统感兴趣,想加入我们或者想进行任何形式的合作,请加微信 skysky1258

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, 2026-5-6 20:52 , Processed in 0.655344 second(s), 193 queries , Redis On.