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: 匿名未登录  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 diffebfzh+0ue7o gco)8t 1q rent scale. They record their resul7e1 f0hgu)o8zqbt+octs as 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 mass of an object, each+ ,9: *gosgfczuxs b4disf1tmsd -o7* using a different scale. They record their results as os dfmz,*+utissog9 cx-1 s:7f gbd4* 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 numbers*cvvs 7;yf7et 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 arenm68homses 8j-+air1 y ;)oms base 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 co a i 5jkteac75i3 x1wkzxb769qzf m79wntains 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 theda.ddsiekx9*.wtk /ec z ,m vh bmfg1c7/2 2x5 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 tlni2dn;5 s*z)t diht8 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 fundamen,d6px;/b vknw(+ jc tttal 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 olye1fnr95 -cene one-thousandth 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-hundremte5tw 6yd.m/3 bhb,ydth 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,5mqlyeiwp) hzx,s3 3o7x sa1

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 0jo hmgq j+.;vz. h-)e(m7qpil.02 days using 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 gibn03nx;kf85onf-mq()v l z h;gbd. factor between $km/h$ 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 f4co/*1 fokzexactor 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 bn j v .ut5nuck9xr*i72etween $cm^{2}$ 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/ hgnnk(qjh)2m*; ;cht,2 l 4oc*c8 afcnmi cl is given 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 uncer 40k o,jb,c q(zvvigt(t8f2sxtainty in 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 ;uwilnt4;d)n.* kngouncertainty for the measurement 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 ci,yw2k0 q 4aqglrcle 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 radhwgch(hch -/ ukb,8:hhqzv6 gk 0 s (qlh(l(2iius $1.96 \pm 0.01 m$?

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 7prpzg :tu0: qzn-0ylb:bh o)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 figuresg6jam3 2 rb.xz 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 figures in 0.040q402km dyy9gj*9p kik5l6p0 -nqz0gmu0ezkm 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 has threehldaw m*67c w1.c ,t4wgtokj6 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 aoa kzp+uo24* n n0 no562kg7mj9uogz dnd 102.24?

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 reccw:9-6uhbo4jx2x+b*f d r bkx tangle 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 blh7rheaq w,jk9;* v+p iql.e2y 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 oc*pcmwcaj *at +-9g f,f $55 ^{\circ}$?

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 f/51 y+mo6g qducyz(y a rectangle are 1.125 m and 0.606 m, respectively. Multiplying, your calzo6 /c dmq+fgyyu5y 1(culator gives 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, respechv7wk snq dn 7z,24j q4 6dbuutbf;;k.tively. You calculate the rectangle's perimeter by adding these and multiplying by two. Your calculator's display reads3.ns67fvzk,n;qwu; . u4jd2hb qtkd 4b7462 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 wid1mg (f4 kije6be. 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 gardendf6poo1aqp5i, q*y +*e mc yy) measures 15 m long and 13.7 m wide. What is the length of a)f,o i+o 56q**1dyqpyeam cpy diagonal from one corner of 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 value1 17c hqzl1jg)vq wn6a.

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 in power of ten w0c3+d6f 8 hpe nxszx7notation.

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 expresko ll::mk 9f(ykb: zd.sed 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 expressed in scientific notatiok3 r0i- .6s dd ;qie:y2vbkkzxn 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 mi4)kv xx:v6z$8.42 \times 10^{-5}$ 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 oftom)jur)1)wis:c7a i wc ,j w, $(0.410 + 0.021) \times (2.20 \times 103)$?

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 (deci: c9c6w v y-pwtt,ob+vmal) 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 pkc;3jsd + g,e3 6vo wm,gvtn(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 millij (.i z5k ur4k7lcw-jz3:odnrgrams?

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 shgpcez zg6 j8qp271a5 ixty kilometers?

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 fole )g85ug sdb0qn)3q1 xvpp:zrlowing 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 10 idr 8gu ,p;(gcvk:)rbk nches 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 fathoms. What is this height,g *ec 1e*eus8 agq0k- u:s/cvl in fq ae1ce s8vg0*c lu/gs* u:ek-eet? ($1 \; fathom = 6 \; ft$)

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 iwju-) uxk hd5)khc/;us 70 years. Assume one numerical figure, write this in power of ten d); cju/ku-h 5)hkwxuin 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,)fx*ocqzfh1 -s m2go 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) is a 100 m dash t ;wkv7ugwmynoq87k o9 ui3;)ahan 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 8xdn ngshd *p*9 ;9 +vl:toxtrzou,y,area?

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 witbq3vb rog4s .5h the correct number of significant figures: $1.00 \; kg + 1531 \; g + 2.54 \times 10^{4} \; mg$.

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 long5 bun:i1jua6 ngm*b2y and 50 yd wide. What is the area of the football field, inun bm5:g b2ny6*a1iuj $m^{2}$, 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. Whatjk6gf1h/8hsk2* nexb 0 uyxq7 is the volume of the 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 ani.) s(mc hkba7 inside diameter of 2.00 cm and an outside diameter of 2.40 cm. What is the total surface area of the pipe, counting the ends, inis(b7hmc )a.k $m^{2}$?

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 sun gu)mi k3;xjd, lc6q9 ajn4;irface area of the Earth in square m6a)xmnq lkc; n i4ijj,;9u3d geters?
($1 \; mi = 1609 \; m$)

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 is9zy3nendkcf e1 8 mhr14 hx*f4 $1.06 \times 103 \; kg/m^{3}$. 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 maspsu 1mcdr ;y39s, in kilograms, of one cubic ys;u crm1yd3p 9ard of concrete 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 rate of 70 beats per minute. If someone's heart beojjn34q(tq 0cq*q.k z4hm: ptats at that aver q qkqzco3:( nqtp0*h .mt4j4jage rate over a 70-yr lifetime, how many times would 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 school buses. If each schoh)f bs1fac2p j98)et5d+aorm xfu0e8w8)vzjol 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 cowu0)d rs eoej8+ af 91vcab8m5 fx2hf pj))8ztst 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 )b2 lxz7+tq0p;co ge y0u0shy m from a flag pole. With a protractor at eye level, he finds that the angle at the top of the flag pole makes with the horizontal is 2 00u7p g2sq)lyo0t zx bhye+;c5.0 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, 9:a9h b redv)sas2f,0h vrjpnh 4.u2* jce6 pva car drives 250 miles east to city B, then 300 miles north to city C, and finally 700 miles west to city D. What is the9.pc jfv02s46 a:p) sbhvh *, rh nj9radueev2 distance between 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 * ,gho4mfo.n mthick. What is the average thickness of a sheet of paper in the book, in centimeters?mo 4hmog,fn *.

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 :rtx usu0mu); cylindrical cardboard tubes. If the length of the tube is 84.5 cm, mt:su uu r0;x)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 figur:6t a5 kw8e- fm854zdl(xasnvfaba 9ues do each 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 number of signifl u+1) j7f 7(fuocoxryicant 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 factor betwek ysoxivcex1zaov6:50lp.,(en
(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 li5gq2y3ups )rh o/ ajnm2 tru.0ght 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, 2026-9-7 19:46 , Processed in 0.729727 second(s), 205 queries , Redis On.