www.chajijin.org

Common comprehensive test(two) of the senior high school graduating class in Guangzhou City in 2005
The thing manage
April, 2005
Originally try a cent choice with don't choose two parts, total 6 pages, full marks is 150 cent.The examination uses time for 120 minutes.
Regulation:
1.Answer before book, the examinee must fill in own name and examinee's number in answering a card with fountain-pen or felt-tipped pen of black handwriting and using a 2 B a pencil will try a type(A) to fill in answering a card.
2.Choice each time small after select the answer use a 2 B a pencil answer the top of a card to in response to topic of the answer mark number black down;If need to change to move, use eraser clean after, choose other answers again;Can't answer in trying a winding.
3.Doing not choose has to make to answer with fountain-pen or felt-tipped pen of black handwriting, the answer has to write in answer a district with appointed each topic of card of correspond position up;If need to change to move, row original answer first, then write up the new answer;No use pencil with alter a liquid.Don't press to above request that making the answer for answer is invalid.
4.The examinee has to keep to answer a nattiness of card, examination be over, will originally try a winding and answer a card to along together hand over back.
The first part choice
-.Subject total 10;Each small 4 cent, total 40 cent.In the each small give of four optionses, the small have is only a correct options and have of the small have many correct optionses.All choose a rightness of get 4 cent, choose not whole of get 2 cent, have already choose wrong or don't answer of get 0 cent.
-.Choice
1.One inside son combines together with a proton a born Dao pit, if their qualities be a m respectively 1, m 2, m 3, then
A.Because reaction in front and back quality number constant, so the m is 1+ BRs with 3< ms with 2= ms>
B.In order to respond released energy, so the m is 1+ BRs with 3< ms with 2> ms>
C.In order to responding under the heat high pressure to carry on, absorb energy thus, so m 1+ ms 2 S A)of bottom from valve door K control, beginning K close, all have on the surface of AN and B can freely move of light piston, the farmland surface Gao is surface at B, the atmosphere out of the piston presses Heng settle, the whole device and the external world have no hot exchange.If open valve door K, the water current after move the balance compares before openning with valve door
A.Water of inside ability constant
B.Water of inside can increase
C.Water of inside can reduce
D.The atmospheric pressure does to A piston positive achievement, do to B piston negative achievement, atmospheric pressure of total achievement is zero
10.For measuresing a certain car at the level keep road up start of acceleration(sport for car to start can look like to see evenly accelerate sport), the someone took 1 the photograph that expose for many times in same film top, is shown as diagram, if take separate 2 to expose once each time, the car carriage is always long for the 4.5 ms, so the acceleration of this car be the most close
A. lm/s2 B. 2m/s 2 C. 3m/s2 D. 4m/s2
The second part doesn't choose
Two.The subject is total 8, total 110 cents.Solution the writing that should write a necessity explains that equation and importance calculate a step, writes an end answer of can't get a goal.There is of number calculation.Have to definitely write a number and unit in the answer.
11.(9 cents)want Be measure as follows diagram A show of the tube wall of a pipe thickness;Instrument and their parts use enlarge diagram as follows diagram B and diagram C to show
Pipe of inside the path is a cm, the outside path is a cm, the tube wall thick cm.
12.(11 cent)some classmate to a shape such as figure 12-the l show of do not know that Fu Anne's characteristic of science of electricity component carries on a research.The experiment data passed diagraph, discovered the electric voltage Uab(U a b=the U a-U b) of that component both ends to relate to with the variety of of electric current I flowed through it as follows form:
Write
1
2
3
4
5
6
7
8
9
10
U ab/ V
-9.000
-1.000
-0.200
0.000
0.245
0.480
0.650
0.705
0.725
0.745
I / mA
0.00
0.00
0.00
0.00
0.15
0.25
0.60
1.70
4.25
7.50
(l)Establish to use to use the characteristic that Mu file in electricity Europe measures this component more, first choice switch the Xuan go to choose "R × lK" file, then press following step in proper order operation:
A. Empress,
B.The â‘  will use the a which connects a component of the red watch pen of form more to carry, black watch pen the b which connect a component carry, and record to use read of form more a number;
The â‘¡ will use the b which connects a component of the red watch pen of form more to carry, black watch pen the a which connect a component carry and record to use read of form more a number.
Settle sex ground use form more to point needle designation in the â‘ â‘¡ of step B of probably the position country is in answer a figure 12-2 â‘ s and figures 12-2 â‘¡s
(2)Draw an Uab ≥ 0:00 the Fu of that component Anne characteristic curve in answer a figure 12-3 of sit the mark.
(3)If connect this component into electric circuit, such as figure 12-4 show, carry importation figure 12-5 As to show the electric voltage signal u c d in the cd of that electric circuit.If want to use to show an electric voltage wave that machine prognosticates an ef form, e, the f should distinguish with figure 12 a 6 of show a connect of a machine line pillar conjunction, make TV screen is last to show u e the stability wave of f a period a form, show the "scan scope" Xuan set of a machine in response to the Xuan to"10 Hzs Hzs-100ses" file, and regulate a knob, until wave the form be stable.
(4)Settle sex ground wave which draws an electric voltage u e f a form in answer the figure in book 12-5 Bs.
13.(L 3 cent)the our country"absolute being boat" No.5 airship on October 15, 2003 at the wine spring aerospace launch site from go on a long journey one 2 F carrier rocket successfully the blast-off go up the sky, if go on a long journey a the 2 F carrier rocket and total quality for airship to take off as l.0 ×s 105 kgs, the rocket take-off pushes dint 3.0 ×s 106 Ns, carrier rocket shoot the tower high 160 ms.(the g take a 10 ms/ s 2)Beg:
(l)If the carrier rocket take off the motivation be constant, neglect the variety of air resistance and rocket quality, carrier rocket through have another to fly off blast-off tower with long hours
(2)This time inside the quality in the airship is for the pressure that the pilot with 65 kgs sits opposite chair have another greatly
14.(15 cent)the some planet surface have no air, at it of the surface neighborhood make evenly and soon the surround of satellite period of circumference sport for the T, if the pilot is keep with v early speed Shu to throw one piece of stone upward at this top in the planet ground, piece of stone upward exercise of biggest height is a h.Have already known universal gravitation Heng quantity for the G, beg that the quality of the planet have much big.
15.(15 cents)two smooth and parallel electric resistances don't account of the metals lead track MN and PQ to mutually be apart from L,
The Shu keeps place in the perpendicularity lead track flat surface outwardly, the Ci strength is in the B evenly strong magnetic field, is lead track top end
Connect to have is been the electric resistance of R1 by the resistivity, capacitor and resistivity constitute for the electric resistance of R2 of electric circuit, like diagram
Show.A quality is a m, the electric resistance is started release by the quiet for the r the level metals good ab, fall
The ab and the MN and the PQ keeps good contact in the process and lead a track enough long, the magnetic field district is enough big.
Beg:
(1)The ab good beginning exercise the electric current direction of the electric resistance R1 is behind
(2)The biggest acceleration of ab stick.
(3)The biggest speed of the ab stick
(4)Try a discussion:if R2, the r enlarges respectively, each will have influence to capacitors electricity the biggest value of the quantity.
16.(15 cent)some small water electricity the station be medium, water with speed v 1 inflow water round machine, , the speed v is 2 run offs, run off water level ratio the inflow water level low H, water of discharge(each flow through water round machine of water of physical volume) is V, density is ρ , the specific heat permits for the c, if the water current reduce of machine ability of 75% transfer to the generator, 20% makes the aqueous temperature go up and beg:
(1)The water temperature go up how much
(2)If the generator generate electricity of the efficiency is 80%, the output's of the generator electricity the power have another greatly
(3)If the g take a 10 ms/s 2, v 1=3 ms/s, the v 2=1 m/s, H=1.6 ms, V=the lm 3/s, ρ =one × 103 kgs/m 3, the exportation electric voltage of generator is 240 Vs, long-distance leave the electric resistance of power line road as 6 Ωs, allow the loss power of the power line road 5%, customer the electric voltage then loses electricity for the 220 Vs use of rise and press transformer of original, the full circle of the vice- coil number ratio the n 1/ n 2 have another greatly
17.(16 cent)a early speed for zero of take a positive electricity grain, the son started exercise from the M plank, through MN the electric field acceleration of 2 after, shoot district into the rectangular abcd from the bore of N plank, is shown as diagram.When take an electricity grain son to arrive
Appeared size inside rectangular abcd district when reach the P order constant, the direction perpendicularity handed over at the paper noodles and the direction
Substitute the evenly strong magnetic field of variety, the Ci responds strength B=0.4 Ts, each through t=(π /4)the × 10-3 ses, magnetic field
The direction changes once, the grain son arrives P to order the magnetic field direction just points to the outside of the paper, there is a quiet in the Q
Of neutral grain son, P, the Q is apart from PQ=3 ms, the straight line PQ is perpendicular to divide equally ab, cd.Have already known c, d
Mutually be apart from D=1.5 ms, take an electricity grain the ratio lotus q/ m of the son=1.0 ×s 104 Cs/kg, the gravity doesn't account and beg:
(1)If accelerate electric voltage U=200 Vs, take an electricity grain son can with neutral grain son collision
(2)At draw an U in the diagram answer winding=200 Vs take an electricity grain the sport track of the son.
(3)Can make to take an electricity grain son and neutral grain son collision, the biggest value of acceleration electric voltage is how much
18.(16 cent)is shown as diagram, one is quiet to put on the smooth level table's top, a bullet with level of early speed v 0 rightwards shot into a wood piece, wear a wood a piece of speed is v 0/2, the wood piece quality is a bullet quality of 200%, establish a wood piece's resistance homology for bullet, if wood piece fixedly on a level highway with speed v evenly and soon and rightwards exercise of car take over, bullet still with v 0 level the early speed shoots from the same direction level go into that wood piece, car of speed v the wood piece will not be shoot to wear(the quality of bullet be far far small in car of quality, putting a car soon can see to make always and constantly) in what scope
Common comprehensive test(two) of the senior high school graduating class in Guangzhou City in 2005
The physics tries a reference answer and grade point standard
A.Choice:
Number
1
2
3
4
5
6
7
8
9
10
Answer
B
BD
A
D
D
AB
B
AC
BD
B
Don't choose
Two.11s.(Total 9 cent)0.240(3 cent), 0.5602(3 cent, the effectively numerical number is wrong 0 cent, estimate to read numeral 0~5 all give cent), 0.160(3 divide, the 4th has behind the decimal point numeral of don't deduct from marks)
12.(Total 11 cents)(l)A.BE short twos to connect, adjust to adjust zero knobs, make watch needle
Full be partial to(2 cents) B.The â‘  is 12-2 â‘ s such as the figure, â‘¡ such as figure 12-2 â‘¡s(whole rightness 2 cent,
Only a diagram to 0 cent)
(2)Scan such as figure 12-3(3 cent, draw fold line 2 cent, draw always line 0 cent)(3) tiny adjust(1 cent)
(4)BE 12-5 Bs(2 cent, u c d positive half week u e f for 0 equally give a cent) such as the figure
13.(Total 13 cent)(l)with the carrier rocket and the airship whole is research object, they the resultant force be subjected to
The F match=F-G(l cent) according to Newton the second laws a=the F match/M(1 cent)
Take off the acceleration(1 cent)(1 cent) in hour
The carrier rocket flies off time(2 cents)(2 cent) of shoot the tower
(2)Take pilot as a research object, establish the quality of pilot is a m, this time inside be subjected to the support dint of sit the chair as N, the resultant force be subjected to matches for the F1
The F1 match=N-mg(1 cent)
From Newton the second laws get F1 to match=N-mg=ma(l cent)
N=mg+ma(l cent)
=65 ×s(l 0+20)(N)=1.9503 Nses of × l(l cent)
According to Newton the third laws, sit the chair be subjected to of the pressure is 1.95 ×s 103 Ns(l cent)
14.(Total 15 cent)establish the planet radius as r, the gravity acceleration of surface is g, quality is M, the quality of satellite is m, the piece of stone quality is 1< BRs for the m>
Can guard the Heng laws m 1 v 2= ms 1 gh to get g according to the machine=v 2@(2 hs)@(1 cent)/
The centrifugal force F of satellite= the 2 rs of m ω (2 cents)(1 cent)
The centrifugal force is past(1 cent) for gravity(2 cent)
Be(1 cent) also
Basis gravitational theory(2 cent)
From above every kind of get(3 cent)
15.(Total 15 cent)(l)the ab good beginning after exercise the electric current direction of the electric resistance R1 arrives to°from the M P(l cent)
(2)When the ab was good to just start exercise, it of speed is zero, responded electric current to zero, ampere dint is zero, the resultant force be subjected to by stick equals gravity, so stick of the acceleration was the biggest and equaled g(2 cent)
(3)The stick starts make acceleration sport from the quiet, respond electromotive force, respond electric current, the ampere dint enlarges gradually, when ampere dint and gravity size that the stick be subjected to are equal, stick of resultant force is zero, acceleration is zero, the speed attain biggest, after make to evenly and soon exercise.Establish the stick evenly and soon exercises the speed is a v, the ampere dint responds the electromotive force as E for the F, the electric current is an I, the back track total electric resistance is R
F=mg(1 cent) F=BIL(1 cent)
I=E/ R(1 cent) E=BLv(1 cent) R= the R be 1+ rs(1 cent)
Allied sign above every kind of solution(1 cent)
(4)When the speed of the stick attains a biggest value after, respond electromotive force to no longer increase, the amount of electricity of the capacitor is the biggest.
The electric voltage(2 cents) of capacitor
The electric capacity which establishes a capacitor is a C, the biggest electricity quantity Q=CUR1(1 cent)(1 cent)
From last type it is thus clear that, the size of R2 and r influence(2 cents) to capacitor the biggest amount of electricity
(Only answer"electric capacity electricity quantity Chong to biggest empress R2 electric currents is zero, R2 aggrandizements have no influence to C the biggest electricity quantity" then asks to 2 cent)
16.(Total 15 cent)(1)the water current machine can reduce quantity every second
(1 cent)(1 cent)
Water of inside can increase water of Δ E=20% Δ Es= cm Δ t(1 cent)(l cent)
The water temperature goes up Δ t=[0.10(v 12-v 22)+0. 20 gHs]/c(l cent)
(2)The generator output's electricity power P=80% ·75% Δ Es=0.60 ρ Vs ·[(v 12-v 22)+gH@(2 cent)@(3)]generation the number word P=80% ×s with 75% ×s one × 103 the ×s be one ×[×(9-1)+10 the ×s be 1.6]s(W)=1.2 ×s 104 Ws(2 cent)
Power line electric current(2 cents)
The generator outputs electric current(1 cent)
Rise to press transformer original vice- coil full circle a number a ratio n 1:n 2= Is 2:I 1(l cent)=1:5(2 cent)
17.(Total 16 cent)solution:establish to take an electricity grain, son's doesing the radius of circumference sport in the magnetic field is evenly and soon a R, period is T
(1)(2 cents)
The T by luck equals magnetic field variety a period of 200%, start to order from the P, the magnetic field changes one power to,
The grain son by luck exercises half circumference.
BE get by the kinetic energy axioms: QU=mv 2(1 cent)
R=mv@(qB)@(1 cent)/
Past(l cent)
(1 cent)
PQ=3 ms=the 6 Rs is the even number of radius to doubly and obviously take an electricity grain son ability and neutral grain the son mutually touch(l cent)
(2)The track is like diagram(3 cent)
(3)Mutually touch a condition:PQ=2 nRs(the n is a positive integral), and R ≤ D, namely 2 nRs=3 ms, the 0.75 ms of R ≤ (2 cent)
The n takes a minimum value, then n=2(1 cent)
R ′ =0.75 ms(1 cent)
From R ′ =the mv ′ /qB, qUm max=mv ′ 2", the generation number word calculate U rnax=450 Vs(2 cent)
18.(Total 16 cent)wood piece the system momentum for constitute of fixedly ex- bullet and wood piece guard Heng, establish the bullet quality is a m, wood piece the speed which is broked through behind is 2< BRs for the v>
Mv 0=2 mvs 2+ mvs 0(1 cent)
Solve v 2= vs 0/4(l cent)
Establish wood piece long d, wood piece fixedly at car up, the bullet cuts through the process wood of wood piece of the piece to move for the L, time establishes son for the t
The interaction dint which plays with wood piece is a f, the prince played to just can broke through a wood piece, it the of opposite wood piece moved for the d, end speed and car soon v equal. According to the conversion of ability with guard Heng laws to beg
(2 cents)
The wood piece makes to evenly and soon exercise with the car, the of wood piece moves L=v t(2 cents)
If the bullet can just wear a wood piece, the bullet moved s@(L ten ds)@(2 cents)=
The basis momentum axioms mv 0-mv=f t(2 cent)
Basis kinetic energy axioms(2 cent)
Allied sign above every kind of solution
So the speed v of car has to satisfy v 0> vs>0.2 vs 0(2 cent, the second big in number empress of coefficient is 0.2-0.25 sames give 2 cent)
The physics tries page