-
Paper 5 -Question1
近5年Precautions precaution solution 使用了弹簧的话和重物，需要avoid unexpected hitting of eyes, use googles 需要移动比较热的东西的时候防止烫伤avoid burn from hot water/metal/oil/coils use gloves 使用线圈的时候，需要防止电流过大 use protective resistor to reduce the maximum currents 如果有液体，需要防止液体撒溅，prevent spillage of water/oil perform the experiment in a tray 如果有灰尘，放置灰尘进眼，prevent dust particles in eyes use googles 如果有较高的物体站立，需要防止掉落，prevent the falling/toppling of turbine/fans use clamp to fix the turbine on…
-
A2 paper4 易错点
以上是经典力学的部分，大家的掌握程度貌似还可以。下面就是大范围的漏洞 以上是静电场和电容器易错内容， 接下来是磁场，也是你们的老大难问题 以上是大家最为薄弱的磁场内容，至少一题，多一点会出两条题目 量子力学内容非常容易猜测，要么考察光电效应，要么考察波粒二象性，要么考察吸收光谱和释放光谱，可能会结合在一起。 接下来的核物理比较简单，计算偏多 倒数第二就是Medical Physics了。 最后一个模块，宇宙学，计算不多。非常固定 谨以此推文，献给我在宝山世外的第一届毕业班的同学们： Boris, Carmela, Cindy, Charlie, Edwin, Elaine, Eric, Hank, Kevin, Vivian 感谢你们一直坚持到了最后，也感谢你们在三年里与我共同经历过点点滴滴美好的瞬间，留下了很多很多美好的回忆。我爱你们！
-
PUM计算器
Calculate CAIE PUM online RAW score of a student Total Mark Threshold A* A B C D E Calculate Raw Percentage: PUM Score: Grade: What is a PUM score Percentage Uniform Mark, PUM is the score shown on the result for Cambridge Assessement International Education(CAIE) Alevel student. To ensure that the lettered grade is…
-
A2 review checklist
该内容根据CAIE官方learner guide，基于2025-207考纲。可以根据是否讲得出来或者回忆出相关内容来进行自我检查。该推文是AS review checklist的进阶版本 Motion in a circle 12.1 Kinematics of uniform circular motion 12.2 Centripetal acceleration Gravitational fields 13.1 Gravitational field 13.2 Gravitational force between point masses 13.3 Gravitational field of a point mass 13.4 Gravitational potential Temperature 14.1 Thermal equilibrium 14.2 Temperature scales 14.3 Specific heat capacity and specific latent heat Ideal gases…
-
Explanation Questions in A2 Pastpapers
1. Gravitational field s19 qp41 Q1(a)s19 qp42 Q1(a) Two point masses are separated by a distance x in a vacuum.State an expression for the force F between the two masses M and m.State the name of any other symbol used. \[F = G\frac{Mm}{x^2}\] where G is the (universal) gravitational constant s19 qp42 Q1(c) Suggest why…
-
常见单位推导
一、国际制单位 System de International The SI – BIPM has set up the standard for measuring the quantity. Seven base unit is defined using the seven universal constants. 二、基本单位Base unit 这7个基本物理量 base quantity以及它们的对应单位分别是 name symbol unit, full name defining constant time t s, second unperturbed ground state hyperfine transition frequency of the caesium-133 atom ΔνCs is 9 192…
-
AS review checklist
该内容根据CAIE官方learner guide，基于2022-2024考纲。可以根据是否讲得出来或者回忆出相关内容来进行自我检查。超链接是pdf版本下载链接。 1. physical quantities and units 1.1 Physical quantities 1.2 SI units 1.3 Errors and uncertainties 1.4 Scalars and vectors 2. Kinematics 2.1 Equations of motion 3. Dynamics 3.1 Momentum and Newton’s laws of motion 3.2 Non-uniform motion 3.3 Linear momentum and its conservation 4. Forces, density and pressure 4.1 Turning effects of forces…
-
AS paper3 套路
Question 1 1. Evidence of repeated reading: 单个题目数据的测量值需要至少测量两次，比如记录长度L，可以在空白的地方记录多次，最终数据值取平均值。marking scheme里面明确如下: Evidence of repeat readings of V. 这里的一分不要忽略 2. Range of data SETS: 记录六组数据，要充分运用最大上限和最小下限。几乎每一套marking scheme里面对range of data都有明确规定。所以最大上限就是完全利用器材的自变量。 比如给了7个增砣砝码，但是需要记录6组数据，那么最大上限就是7个增砣对应的质量；那么1-6当中一些数据可以相应地不用做。 Range: \[ L_\text{max} – L_\text{min} >= 30 \text{cm}\] 这里的range的也是一分。 3. Column heading: 绘制表格的表头heading，需要写物理量符号，单位unit。如果不写的话，会被扣分； 其次，表头可能还需要相应的计算物理量；比如记录的物理量是T，但是需要研究T2 与其他物理量关系，表头还需要增加这一栏，并且相应地也得附上单位。一个正确的表头如下： T/s L/cm T2/s2 1/L /cm-1 前两栏是计量物理量；后面两栏是计算物理量 Column headings: Each column heading must contain a…
-
Definition in AS past papers
1. preparation s18 qp21 Q1(a) State what is meant by a scalar quantity and by a vector quantity. a scalar has magnitude (only) a vector has magnitude and direction w19 qp22 Q1(a) Distinguish between vector and scalar quantities. scalar quantity has (only) magnitude vector quantity has magnitude and direction s21 qp23 Q1(a)ii State two properties that are possessed by both scalar and vector physical…
-
Hello new physicists!
Welcome to Sanjin Zhao’s realm of A-Level physics(9702). Here, let’s discover the interesting world.