AQA A Level Physics复习笔记1.2.2 Calculating Uncertainties
Uncertainty There is always a degree of uncertainty when measurements are taken; the uncertainty can be thought of as the difference between the actual reading taken (caused by the equipment...
AQA A Level Physics复习笔记1.1.3 Estimating Physical Quantities
Orders of Magnitude A quantity is an “order of magnitude” larger than another quantity if it is about ten times larger Similarly, two orders of magnitude would be 100 times larger, or 102 &n...
AQA A Level Physics复习笔记1.1.2 Powers of Ten
Powers of Ten Physical quantities can span a huge range of values For example, the diameter of an atom is about 10–10 m (0.0000000001 m), whereas the width of a galaxy may be about 1021 m (1...
2023年AP宏观经济学考纲三大变化！
再过不久，我们将步入暑假时间，标志着属于2022的时间已经走过了一半。相信许多同学早已“未雨绸缪”，开始准备2023年的AP考试了。日前，CB也公布了2023年AP考试时间和科目安排。 除了明年的考试时间公布之外，CB还...
AP Pre-Calculus课程包括哪些内容？如何学好这门课？
针对2023-24的AP学生CB开设了一门新科目：Pre-calculus 课程包括哪些内容？如何学好这门课？翰林导师的专业解读来了！ 官网：apcentral.collegeboard.org/courses/ap-precalculus 为什么要开发这门课程？ 对于每...
2022AP成绩即将出分，如何查分/送分/复议/取消/隐藏？
2022 AP考试成绩将在7月5日全球同步发送，每位考生可以通过自己的AP学生账号在线查询成绩。但拿到考试成绩不是终点，还需要留意后续的成绩相关流程。 接下来这篇文章会针对同学关心的问题：查分/送分/复议/取消/...
AQA A Level Chemistry复习笔记8.3.4 Required Practical 12
Separation of species by TLC Required practical 12: Separation of species by thin-layer chromatography This practical covers two key laboratory skills use thin-layer or paper chromatography safely ...
AQA A Level Chemistry复习笔记8.3.3 Testing Aldehydes & Ketones
Tollens' Reagent Testing Distinguishing Between Aldehydes & Ketones Weak oxidising agents can be used to distinguish between an aldehyde and a ketone The aldehyde will be oxidised to a c...
AQA A Level Chemistry复习笔记8.3.2 Required Practical 10b
Preparation of an Ester This required practical covers the following mandatory skills use water bath or electric heater or sand bath for heating use laboratory apparatus for a variety of exp...
