IB Physics Homework 1 A0 measurement & uncertainty I (SL & HL)

1#

第 1 题组 (共 70 题 70 分)

What is the difference 103.5 Volts and 102.24 Volts if tkft 1pp n0jr9cl 8jn06hey respectively represent two measurment values of Vo8j1njfr0cn9 6 k0ptplltage?

A. 1.3 Volts

B. 1.26 Volts

C. 1.260 Volts

D. 1.2600 Volts

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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

A thick-walled metal pipe of length 20.0 cm 0fat1fsxh 4 9m*p 48ljg3rzcr has an inside diameter of 2.00 cm and an outsida 4c9p 3ghfjf1l tszr0mx4r*8e diameter of 2.40 cm. What is the total surface area of the pipe, counting the ends, in $cm^{2}$?

A. 276

B. 277

C. 278

D. 279

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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

If $1 \; inch = 2.54 \; cm$, and $1 \; yd = 36 \; in$, how many meters are in 7.00 yd?

A. $6.40 \; m$

B. $36.3 \; m$

C. $640 \; m$

D. $1.78 \times 10^{3} \; m$

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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

In the CGS system, what are the fundamen*aqcw7c/ ::yrbs- gf n0n ,oaetal units?

A. Newton, centimeter, second

B. kilogram, meter, second

C. gram, centimeter, minute

D. gram, centimeter, second

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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 number of significant figures in6ps : qfoockz+0 .vj3ao ;wv3aywg -i)n1.i io 10001 is

A. two

B. three

C. five

D. six

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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 number of significant figures in 0.040 -r 7ef hgmji8 bt6i:n8is

A. one

B. two

C. three

D. four

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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

How many m/s is $50 \; mi/h$ equivalent to? ($1 \; mi = 1609 \; m$)

A. $49 \; m/s$

B. $2.2 \; m/s$

C. $22 \; m/s$

D. $45 \; m/s$

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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

The length and width of a rectangle aredo1q rqvf ek11v-2b4 u 1.125 m and 0.606 m, respectively. You calculate the rectangle's perimeter by adding these and multiplying by two. Your calculator's dispuqq4e1k1db1 vf ro2-vlay reads 3.462 To the correct number of significant figures, this should be written as

A. 3.5 m

B. 3.46 m

C. 3.462 m

D. 3.4620 m

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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

A rectangle is 3.25 m lon(d t +(h *xlt.+kdu)kdco (qcmg and 1.5 m wide. What is its area?

A. $4.875 \; m^{2}$

B. $4.87 \; m^{2}$

C. $4.80 \; m^{2}$

D. $4.9 \; m^{2}$

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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

$1 \; angstrom = 10^{-10} \; m$ and $1 \; fermi = 10^{-15} \; m$, what is the relationship between these units?

A. $1 \; angstrom = 10^5 \; fermi$

B. $1 \; angstrom = 10^{-5} \; fermi$

C. $1 \; angstrom = 10^{-25} \; fermi$

D. $1 \; angstrom = 10^{+25} \; fermi$

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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 metric prefix for one one-hunddl ivy;bas/ 1.redth is

A. milli

B. centi

C. kilo

D. mega

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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

A hot air balloon rises to an altitude of 600 fap3 hj(5in xt+/qrgq5 fthoms. What is this height, in feet? ((txqq h g+pjirnf553/$1 \; fathom = 6 \; ft$)

A. $100 \; ft$

B. $600 \; ft$

C. $1200 \; ft$

D. $3600 \; ft$

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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

What is the area of n 2c n(fp;z)cbzyy 6io 7)nz:da rectangle with dimension $12.56 \; cm$ and $2.12 \; cm$?

A. $27 \; cm^2$

B. $26.6 \; cm^2$

C. $26.23 \; cm^2$

D. $26.627 \; cm^2$

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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

Which one of the following is not equivalent to 2.50 miles? eh)j : w9mj6ot($1 \; mi = \; 1.609 \; km = 5280 \; ft$, $1 \; ft = 12 \; in$)

A. $1.32 \times 10^{4} \; ft$

B. $1.58 \times 10^{5} \; in$.

C. $4.02 \times 10^{3} \; km$

D. $4.40 \times 10^{3} \; yd$

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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

Wall posters are usually solte(mbtqe4) ppe (mq-/d 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 e(q4 pq- ( tpm/ebtme)cm, what is the area of the poster, in $cm^{2}$? (Assume the poster doesn't overlap itself.)

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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

Write out the numberyc4n ylncxo8k( 2brm3 lvu 8//e:9mux+sot2k $8.42 \times 10^{-5}$ in full with a decimal point and correct number of zeros.

A. 0.00000842

B. 0.0000842

C. 0.000842

D. 0.00842

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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

A rectangular garden measures z) 2 iuei lgiyk4*c44on*5hnb 15 m long and 13.7 m wide. What is the length of a diagonal fr k45*bhuie 44czioyig*)2 nn lom one corner of the garden to the other?

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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

An average human has a heart rate of 70 beats per minute. If someone's - 2o -g twj2hpzdch8m3e5f0 ajheart beats at that average rate over a 70-yr lim hw -fa ezjogc52tpj-03h82d fetime, how many times would it beat?

A. $7 \times 10^5$

B. $2 \times 10^{6}$

C. $2 \times 10^{7}$

D. $3 \times 10^{9}$

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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

If $1 \; inch = 2.54 \; cm$, how many square centimeters are in 1.00 square inch?

A. 1.59

B. 2.54

C. 5.08

D. 6.45

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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, in kilograms, of one hra rj.rdtxy vn6 ,zk* (f-8m(cubic yard om86 rnk. dv -*tf( jryxaz(,rhf 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.)

A. $764 \; kg$

B. $2.42 \times 10^{3} \; kg$

C. $3.82 \times 10^{3} \; kg$

D. $6.55 \times 10^{3} \; kg$

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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

100 mL is equivalentbedm7t/u 1l8 w to which of the following?

A. $1 \; kL$

B. $10^{-6} \; mL$

C. $0.1 \; L$

D. $0.01 \; ML$

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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

Write the number 13.5 gigameters as full (decimal) numbers with standard unqxpv2qpd4(gxy+m1i n;ss5 n0 its.

A. 135,000 m

B. 135,000,000 m

C. 135,000,000,000 m

D. 13,500,000,000 m

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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

Four students measure the mass of an objectf.kpik0 -;.o cjhx:*mr qo/c x x(7pjx, each using a different scale. They record their results as followp 7x krf ; .o-/k0*.qo(mhccxi :xxpjjs:
Which student used the most precise scale?

Student	Mass (g)
A	49.06
B	49
C	50
D	49.2

A. B. C. D.

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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

A person stands 35.0 m from a flag pole. h+70xyjwa w)e With a protractor at eye level, he finds 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 ewyhxj )7wea0+yes is 1.7 m.)

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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

Select the list which contains o1kyc e3e,du3h/ynd4nsne/i x c83f-1kksw9xnly SI basic units.

A. liter, meter, second, watt

B. joule, kelvin, kilogram, watt

C. candela, kelvin, meter, second

D. joule, newton, second, watt

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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

How much longer (percentage) is a 100 m das:joj y5acber+yn (; 0yh than a 100 yd dash? ($1 \; yd = 0.9146 \; m$)

A. 3.5%

B. 6.5%

C. 9.3%

D. 12%

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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 mass of an electronh g2+q(r r)8sk0w2hko a cy2kx is $9.1 \times 10^{-31} \; kg$. How many electrons will make a mass of 1.0 kg?

A. $9.1 \times 10^{30}$

B. $1.1 \times 10^{30}$

C. $9.1 \times 10^{31}$

D. $1.1 \times 10^{31}$

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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

What is the percent uncertainty /lowy xn7d ;,oin the area of a circle whose radius is $1.8 \times 10^{4} \; cm$?

A. 1.1%

B. 5.6%

C. 11%

D. 56%

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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

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 $kg/m^{3}$?

A. $9.76 \times 10^{2}$

B. $1.95 \times 10^{3}$

C. $3.90 \times 10^{3}$

D. $7.81 \times 10^{3}$

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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

Starting from city A, a car drivesx1aw.n;d yfr- 250 miles east to city B, then 300 miles north to city C, and finally 700 miles west to city D. Whax -1wryad. ;nft is the distance between city A and city D?

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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 result of .2h) n0s8bos xzc sdb0;srto:$(0.410 + 0.021) \times (2.20 \times 10^3)$ considering significant figures?

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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

A large school district has 300 school buses. If each school bus is mj wg0y23d am-35huc f:3yoarused 3 hours each day, the average c: 5r ym03uy 2m3ohg-da 3wjafspeed 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?

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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

4567.89 is properly expressed in scientific nota spph ;xf-di7un-is 42tion as

A. $4.56789 \times 10^{3}$

B. $45.6789 \times 10^{2}$

C. $456.789 \times 10^{1}$

D. $4567.89 \times 10^{0}$

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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

What is the conversion factor betwe el6+ dpiqts(f-3u.ihen $km/h$ and $m/s$?

A. $0.0278 \; m/s$

B. $0.278 \; m/s$

C. $3.60 \; m/s$

D. $16.7 \; m/s$

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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

Write the number 0.00045 in scientific not4 rli6tjj,l0m- t:oa zation (power of ten notation)

A. $4.5 \times 10^{-4}$

B. $4.5 \times 10^{-3}$

C. $4.5 \times 10^{-2}$

D. $4.5 \times 10^{-1}$

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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

Which is the largest areu :s b,jxjokpw+z17h7a?

A. $2,500,000 \; cm^{2}$

B. $100,000 \; cm^{2}$

C. $7.5 \; m^{2}$

D. $0.75 \; m^{2}$

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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

A useful method of expressing very small or very large numbers itq)n)yl,*icq86dqr))a irjcs n /n7 us

A. scientific notation.

B. arabic numerals.

C. the metric system.

D. roman numerals.

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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

What is the conversion factor bet.0 nd(*xkp;4nozv+g s j:evt nween $cm^{2}$ and $m^{2}$?

A. $0.01 \; m^{2}/cm^{2}$

B. $0.0001 \; m^{2}/cm^{2}$

C. $100 \; m^{2}/cm^{2}$

D. $10000 \; m^{2}/cm^{2}$

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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

The average density of blood psk26 qn/wfo n4poa jlxn8gr7n8d,0+ is $1.06 \times 10^3 \; kg/m^{3}$. If you donate a pint of blood to the Red Cross, what mass of blood have you donated, in grams? ($1 \; pt = 1/2 \; L$, $1 \; L = 1000 \; cm^{3}$.)

A. $530 \; g$

B. $0.530 \; g$

C. $5300 \; g$

D. $5.30 \times 10^{5} \; g$

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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 base SI unit of time issm.8-9 z ,t8wn6ytcjbx xx6rb

A. hour

B. minute

C. second

D. millisecond

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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

The average life of an animal is 70 years 7*lb9qhsk7wn t+y+ wm. Assume one numerical figure, write this in power on+s9mb7khy +7l*w wt qf ten in seconds.

A. $3 \times 10^{7} \; s$

B. $2 \times 10^{7} \; s$

C. $2 \times 10^{9} \; s$

D. $3 \times 10^{9} \; s$

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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

All of the following are(z gupy(:yin xmi-:oa6l,mx0 base units of the SI system except:

A. kilogram.

B. kelvin.

C. meter.

D. volt.

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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

How many grams is forty milligrs +y9yn(3 6fwexn-g swams?

A. $0.000040 \; g$

B. $0.00040 \; g$

C. $0.040 \; g$

D. $40000 \; g$

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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

What is the conversionwl*e( 2 7nw))a hfvwcy factor between $km/h^2$ and $m/s^2$?

A. $7.72 \times 10^{-5} \; m/s^{2}$

B. $2.78 \times 10^{-1} \; m/s^{2}$

C. $1.30 \times 10^{4} \; m/s^{2}$

D. $3.60 \; m/s^2$

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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

What is the percent uncertainty ive 08f2aw. u9vri ./nzw afoa7n the measurement $2.58 \pm 0.15 \; cm$?

A. 2.9%

B. 5.8%

C. 8.7%

D. 12%

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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

What, approximately, is the percent uncertainty0qwf(chg;d- gj3e h8z for the measurement 5.2 mA?

A. 1%

B. 2%

C. 3%

D. 4%

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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

The metric prefix for one :ke * lrfc-lp:thousand is

A. milli

B. centi

C. kilo

D. mega

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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

The metric prefix for one one7t;y/zc*oco sx0qz. l-thousandth is

A. milli

B. centi

C. kilo

D. mega

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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

What is the sum of $2.67 \; cm + 1.976 \; cm + 2.1 \; cm$ considering significant figures?

A. $6.7 \; cm$

B. $6.75 \; cm$

C. $6.746 \; cm$

D. $6.7460 \; cm$

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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

Four students measure tdi4/7 t9vu+z ti/nkal);gd7za3h uq2 py 5jiche mass of an object, each using a different scale. They record thei3/y2 t4vkz7 /);pjq+a dig7 uztlaci59inh udr results as follows:
Which student used the least precise scale?

Student	Mass (g)
A	49.06
B	49
C	50
D	49.2

A. B. C. D.

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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 result of 2.43 divided by 4.52n:r /zu;1lq i9wxu tk61 considering significant figures?

A. $5.3278 \times 10^{-1}$

B. $5.328 \times 10^{-1}$

C. $5.33 \times 10^{-1}$

D. $5.3 \times 10^{-1}$

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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

A football field is 120 yd long and 50 yd wide. What wjj1ykcp ori h257rc ;.8gneck:j 7 ;yis the area of the football field ;pjn8.j5;g17eyc j 27rcciykorkh: w, in $m^{2}$, if $1 \; yd = 91.44 \; cm$?

A. $2.4 \times 10^{3} \; m^{2}$

B. $3.7 \times 10^{3} \; m^{2}$

C. $4.2 \times 10^{3} \; m^{2}$

D. $5.0 \times 10^{3} \; m^{2}$

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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

$0.00325 \times 10^{-8} \; cm$ can also be expressed in mm as

A. $3.25 \times 10^{-12} \; mm$.

B. $3.25 \times 10^{-11} \; mm$.

C. $3.25 \times 10^{-10} \; mm$.

D. $3.25 \times 10^{-9} \; mm$.

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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

If you are 5 feet 10 inches tall, what is01du 1be,8r zcm/,cvn:c jqpt your height in meters? ($1 \; in = 2.54 \; cm$)

A. $1.5 \; m$

B. $1.6 \; m$

C. $1.7 \; m$

D. $1.8 \; m$

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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 radius of the Earth is 3963 mi. What is the surface area of the Earth in)/eosxqe (a 9e square mets eexao( e/)9qers?
($1 \; mi = 1609 \; m$)

A. $2.554 \times 10^{14} \; m^{2}$

B. $2.55 \times 10^{14} \; m^{2}$

C. $2.6 \times 10^{14} \; m^{2}$

D. $5.109 \times 10^{14} \; m^{2}$

E. $5.11 \times 10^{14} \; m^{2}$

F. $5.1 \times 10^{14} \; m^{2}$

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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

0.0001776 can also be es/ olawsmsox+z6zsq :m z9-.hn)6v:f9* ysa bxpressed as

A. $1.776 \times 10^{-4}$

B. $17.72 \times 10^{4}$

C. $1772 \times 10^{5}$

D. $177.2 \times 10^{7}$

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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

Which of the following has three significant fi*ge.lio.5*hf jd luk6gures?

A. $305.0 \; cm$

B. $0.0500 \; mm$

C. $1.00081 \; kg$

D. $8.060 \times 10^{11} \; m^{2}$

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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

The length and width +pil0j1s:w yum l:ya) of a rectangle are 1.125 m and 0.606 m, respectively. Multiplying, your calculator gives the product as 0.68175. Rounding properly to the wiy:pa+1 s : l)juyl0mcorrect number of significant figures, the area should be written as

A. $0.68 \; m^{2}$

B. $0.682 \; m^{2}$

C. $0.6818 \; m^{2}$

D. $0.68175 \; m^{2}$

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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

What is the volume, and its ap2m0qe7i6pa c8uxf)hf f -+jcoproximate uncertainty, of a sphere of radius $1.96 \pm 0.01 \; m$?

A. $31.5 \pm 0.2 \; m^{2}$

B. $31.5 \pm 0.3 \; m^{2}$

C. $31.5 \pm 0.4 \; m^{2}$

D. $31.5 \pm 0.5 \; m^{2}$

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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

A ball has a radius of 3.23 cm. What is the md 0s:8w;.2ps4u;n- bzrsq hmmo4irnvolume of the ball in $m^{3}$?

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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

The position, x, of an objecgtbjj/yc:x 0 .bq,9gf t is given by the equation $x = A + Bt +Ct^2$, where $t$ refers to time. What are the dimensions of A, B, and C?

A. $distance, distance, distance$

B. $distance, time, time^2$

C. $distance, distance/time, distance/time^2$

D. $distance/time, distance/time^2, distance/time^3$

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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

Select the smallest v41 u3 vhwkhe/b.6 stmgalue.

A. $15 \times 10^{-3}$

B. $0.15 \times 10^{0}$

C. $0.00015 \times 10^{3}$

D. $0.00000015 \times 10^{6}$

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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

The last page of a book is numbered 764.(each sheet ir6o(m5es qaf 3s double-sided) The book is 3.00 cm thick. What is th5sq ofe (arm36e average thickness of a sheet of paper in the book, in centimeters?

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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

The number of significant b c.0ozv 8;cnc,mj) okahici6 .ng4(yfigures in 0.01500 is

A. two

B. three

C. four

D. five

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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

Express the number 0.0wqrivp(a j7fpp -t- wo wvos2:,r95y) 2 days using a prefix.

A. 2 decidays

B. 2 centidays

C. 2 millidays

D. 2 microdays

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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

Express the following sum with the correct number of sr-/j d r6)nrz /f/tiwlignificant figures: $1.00 \; kg + 1531 \; g + 2.54 \times 10^{4} \; mg$.

A. $2.56 \; kg$

B. $27.9 \; kg$

C. $2.53 \; kg$

D. $2.79 \; kg$

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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

How many basic units ppk .z9)8z jvcdoes the SI system have?

A. four

B. five

C. seven

D. ten

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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

Convert $1.2 \times 10^{-3}$ to its decimal notation.

A. 1.200

B. 0.1200

C. 0.0120

D. 0.0012

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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

How many meters is sixty kilometers?fq /l:.xrd lcvv 3)g;gauo5(h

A. $600,000 \; m$

B. $60,000 \; m$

C. $60 \; m$

D. $0.06 \; m$

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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 cosine ofq; .gj6tesg/m2ln um/ ntnq+ 7 $55 ^{\circ}$ considering siginficant figures? (use your calculator please)

A. 0.6

B. 0.57

C. 0.574

D. 0.5736

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71#

单选题 ( 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)

A student measures a distance four times. The readings are 37.8 cm, 37.9 cm, 38.p jt abbpg*,2f.u l+.w1 cm, 38.2 cm. What is the best tbw g..f+,jp*pub a l2estimate of this measurement?

A. $37.8 \pm 0.2 \; cm$

B. $37.8 \pm 0.4 \; cm$

C. $38.0 \pm 0.2 \; cm$

D. $38.2 \pm 0.4 \; cm$

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72#

填空题 ( 1.0 分) (组内2/29) 切至整卷模式搜藏此题

A pyramid has a squar k njscx+p 0g12e3gq,pe base 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 $5.3 \%$ and $h$ is measured to $6 \%$, what is the percentage uncertainty of $x ?$ (数值) % (Remember to exclude the $\%$ symbol with your answer)

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73#

单选题 ( 1.0 分) (组内3/29) 切至整卷模式搜藏此题

The variation of quantity P as quantity Q varies*wl:e jz) - .(wsqbkqx is plotted. Theory states that P should vary le. zlq(:xs)kww b*q-j inearly with Q.

A. The systematic errors are substantial.

B. The random errors are substantial.

C. The random errors and the systematic errors are insignificant.

D. The random errors and the systematic errors are substantial.

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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

A rectangle was drawn using a tqvk-ao4o+3jbet)4 t e*pr )uruler, such that each measurement has an uncertainty4rk ue)+ttovo)p 3 ja*qe4tb- of $0.5 \mathrm{~cm} .$

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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75#

填空题 ( 1.0 分) (组内5/29) 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 $5.0 \% $ uncertainty in $V$ and a $2.6 \%$ uncertainty in $r$. What is the percentage uncertainty in $h$ ? (数值) % (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

A piece of string 9.5 ± 0.3 cm long kb34dj*k, yyl is cut from a longer piece that is 12.6 ± 0.2 cm long. How long is the remaining piece of st3b,ykd4j lk* yring?

A. $3.1 \pm 0.3 \; cm$

B. $3.1 \pm 0.3 \; cm$

C. $3.1 \pm 0.5 \; cm$

D. $3.1 \pm 0.6 \; cm$

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77#

单选题 ( 1.0 分) (组内7/29) 切至整卷模式搜藏此题

The length of a pencil is measured using part of a xr/o7loi: pzi, vl:y3metre rule that is graduated in millimetres, as :oio7 r:xi3lpyl v /z,shown below.

What is the length of the pencil?

A. $(6.00 \pm 0.10) \; cm$

B. $(6 \pm 0.1) \; cm$

C. $(6 \pm 0.05) \; cm$

D. $(6.00 \pm 0.05) \; cm$

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78#

单选题 ( 1.0 分) (组内8/29) 切至整卷模式搜藏此题

An ammeter has a non-negligible zero offset error.l:(k5jxfm*ku78plaq Which of the following statements is comqf*ku8l(7l px 5 ja:krrect?

A. The readings from the ammeter will be accurate but not precise.

B. The readings from the ammeter will be neither accurate nor precise.

C. The readings from the ammeter will be precise and accurate.

D. The readings from the ammeter will be precise but not accurate.

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79#

填空题 ( 1.0 分) (组内9/29) 切至整卷模式搜藏此题

A train travels $76.3 \pm 0.7$ meters in $5.441 \pm 0.04$ 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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80#

单选题 ( 1.0 分) (组内10/29) 切至整卷模式搜藏此题

The length of a pencil is measured using part of a meas p cf9f;oana8z-u0f+pobl0l1uring tape as shown belownfop;+bo9 00c1 8azl plu-ffa.

What is the length of the pencil?

A. $4.5 \pm 0.1 \; cm$

B. $11.5 \pm 0.2 \; cm$

C. $11.5 \pm 0.3 \; cm$

D. $11.5 \pm 0.5 \; cm$

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81#

填空题 ( 1.0 分) (组内11/29) 切至整卷模式搜藏此题

The radius of a balloon is measuac70e0nb )bwtotb-o+ red to be $25.5 \pm 1.2 \; cm$. 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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82#

填空题 ( 1.0 分) (组内12/29) 切至整卷模式搜藏此题

The lengths of the sides of a room are kxzusem --s8+;8(mn;jcni ba)lf b: vestimated as $10.0 \mathrm{~m}, 4.0 \mathrm{~m}$ and $3.0 \mathrm{~m}$, each with an uncertainty of $\pm 8 \%$. 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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83#

填空题 ( 1.0 分) (组内13/29) 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 $\pm 5 \%$. What is the percentage uncertainty in the calculated power dissipation? (数值) % (please input value without the % sign.)

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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

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

A. B. C. D.

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85#

填空题 ( 1.0 分) (组内15/29) 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 $1.6 \%$ and the uncertainty in $l$ is $5.6 \%$, what is the percentage uncertainty in $T$ ? (数值) % (only fill in numerical value without the % sign.)

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86#

填空题 ( 1.0 分) (组内16/29) 切至整卷模式搜藏此题

For an object of mass b809x(d xi 1chnhbf 7a$(2.0 \pm 0.1) \mathrm{kg}$, what percentage uncertainty in the velocity will give a $7.3 \%$ 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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87#

填空题 ( 1.0 分) (组内17/29) 切至整卷模式搜藏此题

A student measures a length five times. All of the measurements lie ber l26x/ dr fd3fyk k1d*xkt2u7tween $18.8 \mathrm{~cm}$ 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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88#

填空题 ( 1.0 分) (组内18/29) 切至整卷模式搜藏此题

A force of 10.0 ± 0.9 N is applied to a mass of 2.0 ± 0.06 kg, causzh9 xj x2v kwu; jfgw1o)no5.2ing it to accelerate. What is the percentage uncertainty of its acceleration?w9jhxxgn;uw . jk zovfo521)2 (数值) % (do not include the percent sign in your result)

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89#

填空题 ( 1.0 分) (组内19/29) 切至整卷模式搜藏此题

The potential difference 5o rv8e i+k/lj.b0nys ($V$) across a resistor is measured with a digital voltmeter to be $0.12 \; V$ . What is the percentage uncertainty in $V^2$ ? (数值) % (only put numerical values in the blank.)

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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

The radius of a circle of wire is measured to be 10.0 ±9gsk-u2 gsix- ;qor 3m 1.0 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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91#

单选题 ( 1.0 分) (组内21/29) 切至整卷模式搜藏此题

Experimental data has shown tx0mx:pylr- uh m7ouq8 xeh 6410gfsl,hat:
$$
P=\frac{g h^2}{u^3}
$$
where $g$ is a constant. If the percentage uncertainties in $h$ and $u$ are $a$ and $b$ respectively, what is the percentage uncertainty in $P ?$

A. $2a + 3b$

B. $2a - 3b$

C. $(2a/3b)$

D. $a^2/b^3$

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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

By averaging three measurements of the same quantity which of the foi;z1orw q ( hzag7jt69llowing can be red 1;r7jzgqhioa6w9(z tuced?

A. Random errors

B. Systematic errors

C. Random & systematic errors

D. Zero errors

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93#

单选题 ( 1.0 分) (组内23/29) 切至整卷模式搜藏此题

A student measures two lengths as fx),kj zqj 071ngw82x-joxo jvollows: $$a = (10 \pm 0.1) \; cm$$ $$b = (20 \pm 0.1) \; cm$$
Which of the following quantities has the largest percentage uncertainty?

A. $a$

B. $b$

C. $a+b$

D. $a-b$

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94#

单选题 ( 1.0 分) (组内24/29) 切至整卷模式搜藏此题

An experiment used to measure the acceleratio8iicmc kp9 hu, *b5)uln due to gravity produces the following results:)m 98*5culuic b,ihk p
$\begin{array}{llllllllll}7.83 & 6.98 & 7.52 & 8.01 & 7.76 & 7.15 & 6.87 & 7.25 & 8.35 & 7.54\end{array}$
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 $9.81 \mathrm{~m} \mathrm{~s}^{-2}$ ).

A. There is a large random error, but no systematic error.

B. There is a large systematic error, but a small random error.

C. There are large random and systematic errors.

D. There is a small random error and no systematic error.

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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

The density of a solid sphere is measured with percentage uncertainty of 1%-wafpe 1tdxc4l x3 cf ,w1+2ia. The radius of the sph1cpx-ea1 t4 l,a fiwcwd2+ fx3ere is 3.7 ± 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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96#

填空题 ( 1.0 分) (组内26/29) 切至整卷模式搜藏此题

The lengths of the sides of a rectangular plate are measured, and the diagq7ue7xma k,2i ram shows the measured values ,km27 a7ieq xuwith 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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97#

单选题 ( 1.0 分) (组内27/29) 切至整卷模式搜藏此题

The masses and weights of different objects are indepenz:,uuxze-v 4.hmc r.gdently measured. The graph xc-mzrh.gu.v ,:u ze 4is a plot of weight versus mass that includes error bars.

What do these experimental results suggest?

A. The weight of an object is inversely proportional to its mass.

B. The measurements show a significant random error but small systematic error.

C. The measurements show a significant systematic error but small random error.

D. There is no correlation between the weights and the masses of the objects.

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98#

单选题 ( 1.0 分) (组内28/29) 切至整卷模式搜藏此题

The time for two events, a and b, are -dx ugq 0.pk(ce+ q*tameasured 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?

A. $a+b$

B. $a-b$

C. $a \times b$

D. $a/b$

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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

A water tank is the shape of a cube with sk. bi(k h *qfe4(vvah.cztz:7ides of $4.75 \mathrm{~m}$. Each side is measured with an uncertainty of $0.5 \%$. 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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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)

Which of the following contains one fundamental unik ,ga.5eo mbfnhi6(+t t and one derived unit?

A. volt, kelvin

B. metre, second

C. ampere, kelvin

D. coulomb, newton

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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

A farmer in Tanzania has an average life expectancy of 62 years. Which of the following is an estimate of his lifetime in seconds?

A. $10^5$

B. $10^7$

C. $10^9$

D. $10^{11}$

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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

Which of the following i1cmn g6di. 8 5rnmzc9rs a fundamental unit in the SI system?

A. kevin

B. volt

C. coulomb

D. joule

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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

By approximately how many powers of ten is the heig nm/62fnuas l* azi.w+ht of a human larger than the height of a grain amzf/i 6w*unn.+ls2 aof sand?

A. -3

B. 2

C. 3

D. 1000

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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

Which of the followir*zt0c4 g wg/px:7,pb b3wpfeng could be a unit of power?

A. $kg \cdot m \cdot s^{-2}$

B. $kg \cdot m^2 \cdot s^{-1}$

C. $kg \cdot m^2 \cdot s^{-2}$

D. $kg \cdot m^2 \cdot s^{-3}$

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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 u )j*r mes+8 4jh53jrsq1fiu ovz x4h.of heartbeats of an average adult huma r j8+ *v)os.u4z3r5h mhjj41usifeqx n in a day.

A. $10^4$

B. $10^5$

C. $10^6$

D. $10^7$

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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

If A=10.0 and B=0.50, which calculation will give the answerm9,lib3u, 5,gtnz (-tq alti e with the most decimal pla35,,liu9(-g b n taqzmtlet,ices?

A. $A \times B$

B. $A/B$

C. $A^2$

D. $B^2$

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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

The volume of the Earthaf72d6x/c-hkvgm c8 2nvkj-o is approximately $10^{12} \mathrm{~km}^3$ 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?

A. $10^{12}$

B. $10^{18}$

C. $10^{24}$

D. $10^{30}$

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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

A car has a mass of 1000445vryb 5f)qw3 xbl+g ,czihg kg. A mouse has a mass of 10g. What is the order of magnitude of the r)vl+ 5wq 3y5zgh,gbxf4 i4bcratio between the mass of the car to that of the mouse?

A. -5

B. 5

C. $10^{-5}$

D. 100000

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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

What is the value of h 91pz0vywobn6sg/g 5 $\frac{6.3 \mu \mathrm{m} \times 10 \mathrm{GN}}{2.1 \mathrm{~ms}} ?$

A. $30$

B. $30 \; W$

C. $3 \times 10^7$

D. $3 \times 10^7 \; W$

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