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alevel物理真题

This document consists of 20 printed pages.

IB16 11_9702_11/4RP ? UCLES 2016

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*5340221462*

Cambridge International Examinations

Cambridge International Advanced Subsidiary and Advanced Level

PHYSICS 9702/11

Paper 1 Multiple Choice October/November 2016

1 hour 15 minutes

Additional Materials: Multiple Choice Answer Sheet

Soft clean eraser

Soft pencil (type B or HB is recommended)

READ THESE INSTRUCTIONS FIRST

Write in soft pencil.

Do not use staples, paper clips, glue or correction fluid.

Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you. DO NOT WRITE IN ANY BARCODES.

There are forty questions on this paper. Answer all questions. For each question there are four possible answers A , B , C and D .

Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet.

Read the instructions on the Answer Sheet very carefully.

Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any working should be done in this booklet. Electronic calculators may be used.

? UCLES 2016 9702/11/O/N/16

Data

speed of light in free space c = 3.00 × 108 m s –1

permeability of free space μ0 = 4π × 10–7 H m –1 permittivity of free space

ε0 = 8.85 × 10–12 F m –1

(

41

επ = 8.99 × 109 m F –1)

elementary charge e = 1.60 × 10–19 C the Planck constant h = 6.63 × 10–34 J s unified atomic mass unit 1 u = 1.66 × 10–27 kg rest mass of electron m e = 9.11 × 10–31 kg rest mass of proton m p = 1.67 × 10–27 kg molar gas constant R = 8.31 J K –1 mol –1 the Avogadro constant N A = 6.02 × 1023 mol –1 the Boltzmann constant k = 1.38 × 10–23 J K –1 gravitational constant G = 6.67 × 10–11 N m 2 kg –2 acceleration of free fall g = 9.81 m s –2

? UCLES 2016 9702/11/O/N/16

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Formulae

uniformly accelerated motion s = ut + 221

at

v 2 = u 2 + 2as work done on/by a gas W = p ?V

gravitational potential φ = – r Gm

hydrostatic pressure p = ρ gh

pressure of an ideal gas p = V Nm 31

simple harmonic motion a = – ω 2x velocity of particle in s.h.m. v = v 0 cos ωt

v = ± ω )(220x x ?

Doppler effect o f = s

s v v v

f ±

electric potential V =

r

Q 04επ capacitors in series 1 / C = 1 / C 1 + 1 / C 2 + . . . capacitors in parallel C = C 1 + C 2 + . . .

energy of charged capacitor W = QV 21

electric current I = Anvq resistors in series R = R 1 + R 2 + . . . resistors in parallel 1 / R = 1 / R 1 + 1 / R 2 + . . . Hall voltage

V H =

ntq

B I

alternating current/voltage x = x 0 sin ωt radioactive decay x = x 0 exp(–λt )

decay constant

λ = 2

1

0.693t

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1

What is the order of magnitude of the Young modulus for a metal such as copper? A 10–11 Pa

B 10–4 Pa

C 104 Pa

D 1011 Pa

2 The force F between two point charges q 1 and q 2, a distance r apart, is given by the equation

F = 2

21r q kq

where k is a constant.

What are the S I base units of k ?

A kg m 3 s –4 A 2

B kg m 3 s –4 A –2

C kg m 3 A 2

D kg m 3 A –2

3 An aeroplane can fly at a velocity X when moving through still air. When flying in wind the

aeroplane’s velocity relative to the ground is Y .

Which vector diagram shows the magnitude and direction of the wind velocity W ?

X

X

X

Y

Y

Y

W

W

W

X

Y

W

A B C D

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9702/11/O/N/16

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4 A voltmeter gives readings that are larger than the true values and has a systematic error that varies with voltage.

Which graph shows the calibration curve for the voltmeter?

43

210

012A

34meter reading / V true

value /

V

43

210

012B

34

meter reading / V

true

value / V

43

210

C

meter reading / V

true

value / V

43

210

D

meter reading / V true

value / V

5 length of 10.0

A 7.1 × 10–6 s

B 1.4 × 10–5 s

C 7.1 × 10–3 s

D 1.4 × 10–2 s

6 A cyclist pedals along a raised horizontal track. At the end of the track, he travels horizontally into

the air and onto a track that is vertically 2.0m lower.

The cyclist travels a horizontal distance of 6.0m in the air. Air resistance is negligible.

What is the horizontal velocity v of the cyclist at the end of the higher track?

A 6.3m s–1 B

s–1

7

m s–1, as shown.

8.00

4.00m s–1

The acceleration of free fall on the Moon is 1.62m s–2.

What will be the speed of the ball 9.00s after being thrown?

A 6.6m s–1

B 7.7m s–1

C 10.6m s–1

D 14.6m s–1

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8 A car is travelling at constant velocity. At time t = 0, the driver of the car sees an obstacle in the road and then brakes to a halt. The graph shows the variation with t of the velocity of the car.

20

00.8 5.0

t / s velocity / m s –1

How far does the car travel in the 5.0 s after the driver sees the obstacle? A 16 m

B 42 m

C 58 m

D 84 m

9 A car is stationary at traffic lights. When the traffic lights change to green, the driver presses

down sharply on the accelerator. The resultant horizontal force acting on the car varies with time as shown.

Which graph shows the variation with time of the speed of the car?

B

A

10 A beach-ball falls vertically from a high hotel window. Air resistance is not negligible.

Which graph shows the variation with time t of the acceleration a of the ball?

11 A car has mass m. A person needs to push the car with force F in order to give the car

acceleration a. The person needs to push the car with force 2F in order to give the car acceleration 3a.

Which expression gives the constant resistive force opposing the motion of the car?

A ma B2ma C3ma D4ma

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12 A box is shown resting on the ground. Newton’s third law implies that four forces of equal

magnitude are involved. These forces are labelled P, Q, R and S.

Forces P and Q act on the box. Forces R and S act on the Earth.

For clarity, the forces are shown slightly separated.

ground

Which statement about the forces is correct?

A P is the equal and opposite force to Q and both are forces of contact.

B Q is the equal and opposite force to P and both are gravitational forces.

C R is the equal and opposite force to S and both are forces of contact.

D S is the equal and opposite force to Q and both are gravitational forces.

13Two spheres travel along the same line with velocities u1 and u2. They collide and after collision

u

1

v

1

u

2

v

2

Which collision is not elastic?

u1/m s–1u2/m s–1v1/m s–1v2/m s–1

A 2 –5 –5 –2

B 3 –3 0 6

C 3 –2 1 6

D 5 2 3 6

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14 A submarine has circular windows of diameter 0.30 m. The windows can experience a maximum

external pressure of 660 kPa before they crack.

What is the minimum external force needed to crack the windows?

A 47 000 N

B 190 000 N

C 310 000 N

D 620 000 N

15 Four beams of the same length each have three forces acting on them.

Which beam has both zero resultant force and zero resultant torque acting?

90 N A

106 N B

63 N

C

112 N

D

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Which diagram shows the directions of the horizontal and vertical forces acting on the ends of the beam?

A

B C D

17 A hydroelectric power station uses the gravitational potential energy of water to generate

electrical energy.

In one particular power station, the mass of water flowing per unit time is 1.5 × 105 kg s –1. The water falls through a height of 120 m.

The electrical power generated is 100 MW.

What is the efficiency of the power station?

A 5.6%

B 43%

C 57%

D 68%

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18 An engine transforms thermal energy into mechanical work. The engine takes in thermal energy

Q in from a heat source and gives out thermal energy Q out to a heat sink, producing useful work W .

heat source

engine

heat sink

in W

out

What is the efficiency of this engine? A

out

in Q Q W + B

out

in Q Q W ? C

in

Q W D

out

Q W

19 A truck of mass 500 kg moves from rest at the top of a section of track 400 m long and 30 m high,

as shown. The frictional force acting on the truck is 250 N throughout its journey.

What is the final speed of the truck? A 14 m s –1

B 24 m s –1

C 31 m s –1

D 190 m s –1

20 Which condition must apply for the work done by an expanding gas to be p ?V , where p is the

pressure of the gas and ?V is its change in volume?

A No thermal energy must be supplied to the gas.

B The expansion must be at a constant rate.

C The pressure must be constant.

D The temperature of the gas must be constant.

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21 A metal wire is stretched to breaking point and the force-extension graph is plotted.

Which graph is correctly labelled with the elastic region, the plastic region and the area representing the work done to stretch the wire until it breaks?

force / plastic A force / elastic B

force / force / plastic D

22 A copper wire hangs vertically from a fixed point. A load is attached to the lower end of the wire

producing an extension x . The wire obeys Hooke’s law.

Which single change gives an extension 2x ?

A Halve the cross-sectional area of the wire.

B Halve the diameter of the wire.

C Halve the length of the wire.

D Halve the load on the wire.

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Which row correctly identifies the principal radiation for each of these wavelengths?

10–14 m 10–10

m 10

–6 m 10–2 m 102 m A gamma ray X-ray infra-red microwave radio wave B radio wave microwave infra-red X-ray gamma ray C radio wave

microwave

ultraviolet

infra-red

X-ray

D

X-ray infra-red ultraviolet microwave radio wave

24 The diagram shows an experiment to produce a stationary wave in an air column. A tuning fork,

placed above the column, vibrates and produces a sound wave. The length of the air column can be varied by altering the volume of the water in the tube.

tuning fork

The tube is filled and then water is allowed to run out of it. The first two stationary waves occur when the air column lengths are 0.14 m and 0.42 m.

What is the wavelength of the sound wave?

A 0.14 m

B 0.28 m

C 0.42 m

D 0.56 m

X

s X

s

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26 The warning signal on an ambulance has a frequency of 600 Hz. The speed of sound is 330 m s –1.

The ambulance is travelling with a constant velocity of 25 m s –1 towards an observer.

initial position

of ambulance final position

of ambulance

observer

Which overall change in observed frequency takes place between the times at which the

ambulance is a long way behind the observer and when it is a long way in front of the observer? A 49 Hz

B 84 Hz

C 91 Hz

D 98 Hz

27 Diagrams X and Y show the passage of water waves around an obstacle and through a gap.

The thick lines are barriers to the waves and each thin line represents a wavefront.

X

Y

Which statement is correct?

A Diagrams X and Y both illustrate diffraction.

B Diagrams X and Y both illustrate interference.

C Only diagram X illustrates interference.

D Only diagram Y illustrates diffraction.

28

vibration up and down end

A 0

29 A diffraction grating is used to measure the wavelength of monochromatic light.

The spacing of the slits in the grating is 1.15 × 10–6m. The angle between the first order diffraction maxima is 60.0°, as shown in the diagram.

monochromatic

light

What is the wavelength of the light?

A 288nm

B 498nm

C 575nm

D 996nm

30Which path shows a possible movement of an electron in the electric field shown?

31The diagram shows an electric field pattern caused by two positive and two negative point charges of equal magnitude placed at the four corners of a square.

In which direction does the force act on an electron at point X?

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32 Two large horizontal metal plates are separated by 4 mm. The lower plate is at a potential

of –80 V.

–80 V

mm

Which potential should be applied to the upper plate to create an electric field of strength

60 000 V m –1

upwards in the space between the plates? A –320 V

B –160 V

C +160 V

D +320 V

33 An electric kettle is marked 3.10 kW. It is used with an electrical supply of 240 V.

What is the electric current in the kettle and what is the kettle’s electrical resistance when working?

current / A resistance / ? A

0.0129 18 600 B 0.0770 3100 C 12.9 18.6 D

12.9

3100

34 A thick copper wire is connected to a thin copper wire in series with a cell, as shown.

What is significantly less in the thick wire than in the thin wire?

A the charge passing a point per unit time

B the drift speed of the electrons

C the number density of the free electrons

D the number of free electrons passing a point per unit time

35 What is a typical value for the order of magnitude of the resistivity of copper?

A 10–13 ? m

B 10–8 ? m

C 10–3 ? m

D 102 ? m

36 In the circuit shown, the reading on the ammeter is zero.

R3

R4

The four resistors have different resistances R1, R2, R3 and R4.

Which equation is correct?

A R1 – R3 = R2– R4

B R1×R3 = R2× R4

C R1 – R4 = R2– R3

D R1×R4 = R2× R3

37The diagram shows currents I1, I2, I3, I4 and I5 in different branches of a circuit.

45

Which equation is correct?

A I1 = I2 + I3

B I2 = I1 + I3

C I3 = I4 + I5

D I4 = I5 + I3

? UCLES 2016 9702/11/O/N/16 [Turn over

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity.

To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge International Examinations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at https://www.sodocs.net/doc/263099081.html, after the live examination series.

Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.

? UCLES 2016 9702/11/O/N/16

38 What is a proton?

A a hadron

B a particle consisting of two down quarks and one up quark

C a positive fundamental particle

D a positive lepton

39 What are the correct descriptions of a γ-ray and a β– particle?

γ-ray

β– particle

A high-speed electron electromagnetic radiation

B electromagnetic radiation helium-4 nucleus

C electromagnetic radiation high-speed electron

D

high-speed electron

helium-4 nucleus

40 In a radioactive decay series, three successive decays each result in a particle being emitted.

The first decay results in the emission of a β– particle. The second decay results in the emission of an α particle. The third decay results in the emission of another β– particle.

S

Nuclides P and S are compared.

Which statement is correct?

A P and S are identical in all respects.

B P and S are isotopes of the same element.

C S is a different element of lower atomic number.

D S is a different element of reduced mass.

CIE AS ALevel Paper3 物理2020年真题 实验题

Cambridge International AS & A Level DC (JC/CT) 182587/3? UCLES 2020 [Turn over This document has 12 pages. Blank pages are indicated. *5745011940* PHYSICS 9702/33 Paper 3 Advanced Practical Skills 1 February/March 2020 2 hours You must answer on the question paper. You will need: The materials and apparatus listed in the confidential instructions INSTRUCTIONS ●Answer all questions. ●Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs. ●Write your name, centre number and candidate number in the boxes at the top of the page. ●Write your answer to each question in the space provided. ●Do not use an erasable pen or correction fluid. ●Do not write on any bar codes. ●You will be allowed to work with the apparatus for a maximum of 1 hour for each question. ●You should record all your observations in the spaces provided in the question paper as soon as these observations are made. ●You may use a calculator. ●You should show all your working and use appropriate units. INFORMATION ●The total mark for this paper is 40. ●The number of marks for each question or part question is shown in brackets [ ]. For Examiner’s Use 12Total

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Alevel基础化学常用英语词汇 1.The Ideal-Gas Equation 理想气体状态方程 2. Partial Pressures 分压 3. Real Gases: Deviation from Ideal Behavior 真实气体:对理想气体行为的偏离 4. The van der Waals Equation 范德华方程 5. System and Surroundings 系统与环境 6. State and State Functions 状态与状态函数 7. Process 过程 8. Phase 相 9. The First Law of Thermodynamics 热力学第一定律 10. Heat and Work 热与功 11. Endothermic and Exothermic Processes 吸热与发热过程 12. Enthalpies of Reactions 反应热 13. Hess’s Law 盖斯定律 14. Enthalpies of Formation 生成焓 15. Reaction Rates 反应速率 16. Reaction Order 反应级数 17. Rate Constants 速率常数 18. Activation Energy 活化能 19. The Arrhenius Equation 阿累尼乌斯方程 20. Reaction Mechanisms 反应机理 21. Homogeneous Catalysis 均相催化剂 22. Heterogeneous Catalysis 非均相催化剂 23. Enzymes 酶 24. The Equilibrium Constant 平衡常数 25. the Direction of Reaction 反应方向 26. Le Chatelier’s Principle 列·沙特列原理 27. Effects of Volume, Pressure, Temperature Changes and Catalysts 体积,压力,温度变化以及催化剂的影响 28. Spontaneous Processes 自发过程 29. Entropy (Standard Entropy) 熵(标准熵) 30. The Second Law of Thermodynamics 热力学第二定律 31. Entropy Changes 熵变 32. Standard Free-Energy Changes 标准自由能变 33. Acid-Bases 酸碱 34. The Dissociation of Water 水离解 35. The Proton in Water 水合质子 36. The pH Scales pH值 37. Bronsted-Lowry Acids and Bases Bronsted-Lowry 酸和碱 38. Proton-Transfer Reactions 质子转移反应 39. Conjugate Acid-Base Pairs 共轭酸碱对 40. Relative Strength of Acids and Bases 酸碱的相对强度

ALEVEL物理AUnit复习资料之

Section 6: Oscillations Revision spread1 : Simple harmonic motion Checkpoints : (1)recall that the condition for simple harmonic motion is F=-kx Identify situations in which simple harmonic motion will occur. (2) recognize and use the expressions a=-ω2x, a=-Aω2xcosωt, v=-Aωsinωt,x=A cosωt,and T=1/f=2π/ωas applied to a simple harmonic oscillator. (3) obtain a displacement-time graph for an oscillating object and recognize that the gradient at a point gives the velocity at that point. (201306-1)A mass is bouncing on the end of a vertical spring. Its motion will be simple harmonic if the spring A .can store energy. B .has elasticity. C .is hung vertically. D .obeys Hooke’s law. (201206-4)Which of the following is not an example of simple harmonic motion? A A car bouncing on its suspension system. B A child jumping on a trampoline. C A person bouncing on the end of a bungee cord. D A swinging pendulum in a grandfather clock. 201301

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英国高中Alevel课程介绍 一、课程体系 英国高中课程(General Certificate of Education Advanced Level)简称A-Level课程,于1951年在英国正式启用。它是英国的全民课程体系,也是英国学生的大学入学考试课程,A-Level课程证书被几乎所有英语授课的大学作为招收新生的入学标准。因此,A-Level课程被国际教育界誉为“金牌”教育方式(British Golden Education System)。英国学生一般在16岁或稍大一些开始学习这种课程,圆满修完这种课程即可进入大学就读。这种课程可以简单理解为中国的高中。能否上英国大学特别是好的名牌大学,A Level成绩是关键。 二、课程的权威性 该课程体系的教学大纲、课程设置及其考试分别由英国四个主要考试 局Cambridge International Examinations,简称 CIE, Oxford Cambridge and RSA Examinations 简称 OCR, Assessment and Qualifications Alliance 简称AQA 和EDEXEL设计并组织,其权威性得到了国际上的广泛认可。迄今为止,全球已有5000多个教育机构开设了英国高中课程,每年有数百万学生参加由这些考试局组织的统一考试。由于该课程的科学性和权威性,新加坡甚至直接将该课程考试作为大学入学的全国统一考试。 三、教学质量控制 英国国家考试局对每一个开设A-Level的高级附属中心都进行严格的教学质量控制措施。每一位教授A-Level课程的老师都经过严格的筛选和测评。同时,老师们也可以通过多种渠道得到英国国家考试局的协助和培训。为了监控分布在世界上150多个国家教育中心的教学质量,这些考试局已经在全球各地建立了完善的组织网络;通过其批准的高级附属中心,不定期地对教学质量进行检查和评定。从而保证每一个就读A-Level课程的学生能接受到高质量的教育。 四、A-Level课程的优点 除大学预科课程之外,A-Level课程是中国学生入读英国大学的最佳途径。这是因为A-Level课程要大大优于大学基础课程,其优点有以下三方面: 第一、中国学生在国内的高一或高二的在校学生可以赴英国学习A-Level课程。这样,他们再经过两年的学习就可以进入英国大学就读,而不是像在中国那样,高中毕业然后还要学习一年的大学预科课程,才能入读英国大学。 第二、这种课程是为中国学生进入英国大学做准备的理想课程。无论是在学业方面还是在语言方面都会高于大学基础课程可达到的程度。中国学生要用英语学习各门课程,亲自体验新的教学方法,其英语也会达到相当熟练的程度。 第三、牛津、剑桥、帝国理工和伦敦大学学院这样的名牌英国大学几乎是从不录取大学预科的学生,而只录取A-Level毕业证书或同等学历的学生。同样,如果没有A-Level毕业证书或同等学历,要想就读像医科或医疗卫生领域的某些课程

ib课程包括哪些科目

而选择IB课程,学生必须在第二语言、社会科学、英语、实验科学和数学这几门课程中修满并至少拿到3门的高分数。此外还需要选择一个选修课,2个学期的Theory of Knowledge,2年内150小时的社会实践活动以及写一篇4000字的论文。 学生必须在课程开始之前制定出选课方案,具体时间可以在10年级结束或者11年级的开始。 IB课程学科设置及考试 参与IB文凭项目的学生要获得文凭,在两年里要从6个学术领域的学科板块中选择6门课程进行学习,并通过考核,还要完成3项必选拓展课程。由于课程的深度与广度的关系,课程分为高级(High Level,简称HL)与标准(Standard Level,简称SL)两个层次。

课程板块 第一板块:语言A1与世界文学 第二板块:语言B(母语以外的现代语) 第三板块:个人与社会学(历史、地理、经济学、哲学、心理学等) 第四板块:实验科学(物理、化学、生物、设计、环境系统等) 第五板块:数学(数学高等级、高等数学标准等级、数学研究、数学法) 第六板块:艺术与选修(美术设计、音乐、戏剧艺术等,或第三种现代语,或从第三组、第四组中再选一科,或高等数学标准等级) 每个学生要从六大基础学科组的每一组中选出一科学习。每个科目分两个层次:标准课程与高级课程。每科标准课程的教学时数是150学时,高级课程教学时数是不少于240学时。 在学生选择的ib预科课程的六门科目中,最少三门最多四门是高级课程,其他是标准课程,这样即保证了学科基础的宽度,又具有足够学术深度。

学生自学超过六门(或高级课程超过四门)当然没有限制。各个学科组的课程都始终在不断地检验与更新之中,以适应该学科领域的最新发展。 学通国际课程培训中心自2008年起一直致力于ALEVEL、IGCSE、IB、AP、SAT2等主流国际课程中30多门科目的提分与培优,经11年深耕教学,目前已拥有教师团队80余人,其中20%为博士,80%为名校海归硕士,平均国际课程教龄8年以上,每年为学生提供50000小时以上的高品质课程。除常规国际课程培训外,我们还提供“G5全程护航计划”——全天候全脱产式学习,“全球TOP10大学冲击计划”——高考留学两不误双轨制ALEVEL课程,国际学校备考与衔接课程,英国G5名校STEP、MAT、PAT、TSA、牛剑面试等附加考试辅导,海外学校iTEP、Ukiset、AEAS、AEIS、维立克面试等入学考试辅导课程;同时还提供个性化的学术背景提升项目。

Alevel考试物理考纲内容

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不难。难点是考试中如何通过计算出来的结果,分析和准确的描述和解释问题中所问的物理现象。这类题目呢,叫做陈述题,ALEVEL考试中大约30%-40%的的分数是这类题目,学生往往会在这上面丢掉不少分数。 整个Alevel物理学部分有5张,我们可以把他分为paper 1到paper 5,AS阶段需要完成选择题、简答计算题、实验操作题,而在A2阶段需要完成的是简答计算题含应用物理以及实验设计题。 学通国际课程培训中心自2008年起一直致力于ALEVEL、IGCSE、IB、AP、SAT2等主流国际课程中30多门科目的提分与培优,经11年深耕教学,目前已拥有教师团队80余人,其中20%为博士,80%为名校海归硕士,平均国际课程教龄8年以上,每年为学生提供50000小时以上的高品质课程。除常规国际课程培训外,我们还提供“G5全程护航计划”——全天候全脱产式学习,“全球TOP10大学冲击计划”——高考留学两不误双轨制ALEVEL课程,国际学校备考与衔接课程,英国G5名校STEP、MAT、PAT、TSA、牛剑面试等附加考试辅导,海外学校iTEP、Ukiset、AEAS、AEIS、维立克面试等入学考试辅导课程;同时还提供个性化的学术背景提升项目。

a-level化学课程大纲

第一单元 化学的基本原理 1) 公式、方程和物质的量 1. 理解原子、元素、离子、分子、化合物、实验式和分子式的定义。 2. 能写出简单反应的平衡方程式(全方程和离子方程),包括状态符号的使用。 3. 理解相对原子量、物质量、分子量、百万分率的定义,比如大气、废弃和水污染中的气体。 4. 计算已知浓度溶液中物质的量(不包括滴定计算)。 5. 用化学方程计算反应量,反过来利用物质量和摩尔量的定义计算。 6. 用化学方程计算气体的体积,反过来利用物质量和气体摩尔体积的定义计算。 7. 用化学方程和实验结果推测百分产率、实验室原子经济和工业过程,并理解它们为何重要。 8. 用阿佛加德罗常数计算。 9. 制盐并计算产物的百分产率。 10. 进行一些简易的试管反应并分析结果,如置换、酸的反应、沉淀,练习写完整的化学方程和离子方程。 2)能量学 1. 理解焓变的定义。 2.构建简易的焓级图体现焓变。

3. 放热反应和吸热反应。 4. 复述反应、生成、燃烧、中和和原子化中标准焓变的定义;用实验数据计算反应中转换的能量以及焓变。 5. 复习赫斯定律并将其运用于计算提供数据的反应中的焓变,理解为什么标准数据用于这类型的计算是必要的。 6. 转换能(焦耳)=质量X特定热容量X温差,用此公式估算从实验中会得到的结果。需要做的实验有:在一个绝缘容器内将物质混合并测量升高的温度;简易的燃烧焓实验;做一个焓变不能直接被测量的实验。 7. 证明对键焓和平均键焓定义的理解,将键焓运用于计算赫斯周期并能说出它的局限性。 3)原子结构和元素周期表 1. 复习相对原子量、相对同位素质量和相对分子量的定义。理解他们是通过测量一个12C原子的1/12的质量。 2. 证明对质谱仪基本原理的理解,并能从质谱仪中分析数据去推测一个元素的同位素组成,相对原子量和测量一个化合物的相对分子量。 3. 放热反应和吸热反应。 4. 复述反应、生成、燃烧、中和和原子化中标准焓变的定义;用实验数据计算反应中转换的能量以及焓变。 5. 复习赫斯定律并将其运用于计算提供数据的反应中的焓变,理解为什么标准数据用于这类型的计算是必要的。

Alevel 物理习题4牛顿定律应用题

Newton's Laws Name: Newton's Second Law Problem-Solving Study from Lessons 3 of the Newton's Laws chapter at The Physics Classroom: https://www.sodocs.net/doc/263099081.html,/Class/newtlaws/u2l3c.html https://www.sodocs.net/doc/263099081.html,/Class/newtlaws/u2l3d.html For the following problems, construct a free-body diagram and show your work clearly. 1. A rightward force of 302 N is applied to a 28.6-kg crate to accelerate it across the floor. The coefficient of friction between the crate and the floor is 0.750. Determine the acceleration of the crate. 2. During a football workout, two linemen are pushing the coach on the sled. The combined mass of the sled and the coach is 300. kg. The coefficient of friction between the sled and the grass is 0.800. The sled accelerates at a rate of 0.580 m/s/s. Determine the force applied to the sled by the lineman. 3. A 405-N rightward force is use to drag a large box across the floor with a constant velocity of 0.678 m/s. The coefficient of friction between the box and the floor is 0.795. Determine the mass of the box. 4. A 6.58 x 103 N upward tension force is exerted on a 521-kg downward-moving freight elevator. Determine the acceleration of the elevator.

chapter 7 redox reaction氧化还原反应alevel化学CIE

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Alevel经济学历年试卷June 2016 MS - Paper 1 Edexcel (A) Economics AS-level

Mark scheme (Results) Summer 2016 Pearson Edexcel GCE AS Level in Economics A (8EC0) Paper 01 Introduction to markets and market failure

Edexcel and BTEC Qualifications Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding body. We provide a wide range of qualifications including academic, vocational, occupational and specific programmes for employers. For further information visit our qualifications websites at https://www.sodocs.net/doc/263099081.html, or https://www.sodocs.net/doc/263099081.html,. Alternatively, you can get in touch with us using the details on our contact us page at https://www.sodocs.net/doc/263099081.html,/contactus. Pearson: helping people progress, everywhere Pearson aspires to be the world’s leading learning company. Our aim is to help everyone progress in their lives through education. We believe in every kind of learning, for all kinds of people, wherever they are in the world. We’ve been involved in education for over 150 years, and by working across 70 countries, in 100 languages, we have built an international reputation for our commitment to high standards and raising achievement through innovation in education. Find out more about how we can help you and your students at: https://www.sodocs.net/doc/263099081.html,/uk Summer 2016 Publications Code 8EC0_01_1606_MS All the material in this publication is copyright ? Pearson Education Ltd 2016

alevel数学试卷答案[推荐]

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当年考试成绩具体情况,做出相应的调整,每个学生的最终成绩是按照这个学生的成绩在当年全国总成绩的百分比的位置,比如在前10%的就是A,下一个10%就是B,依次类推。 新加坡alevel考试时间说明 报考时间:每年3月中下旬; 考试时间:在每年7月/8月为口试,笔试在10月、11月; 成绩发布时间:每年成绩发布时间为第二年的3月中旬,有效期为两年; 报考大学的时间:一般在公布成绩后的1-2周内结束大学和理工学院的网络报名申请,学校会组织老师和学长召开指导大会,指导同学们选择可行的专业,并提供网络报名的帮助; 大学的录取时间:学生在成绩公布后的一周左右的时间通过网络申请大学的课程,一般要等2-3个月才能得到大学的录取通知书,然后学生根据录取通知书上的指导到学校报道、申请准证,开始新的留学旅程。大学的开学时间一般在每年的8月份; 新加坡学生报名截止日期为3月,留学生预备班报名截止日期为2月。此外,如考生成绩不理想,可以第二年再考一次,每名学生最多可考两次,以最好的成绩组合申请。 新加坡alevel考试考什么 中国留学生alevel考试备考指南

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