AQA A Level Physics復(fù)習(xí)筆記1.2.1 Sources of Uncertainty
Random & Systematic Errors Measurements of quantities are made with the aim of finding the?true value?of that quantity In reality, it is impossible to obtain the true value of any quanti...
2022紐約時(shí)報(bào)中學(xué)生社論競賽詳解，獲獎(jiǎng)作品將在紐約時(shí)報(bào)刊登、全球發(fā)表！
國際社會(huì)風(fēng)云變幻的今天，對于時(shí)事熱點(diǎn)話題分享個(gè)人見解、加以評論正在成為新一代世界公民的必備素養(yǎng)，大名鼎鼎的紐約時(shí)報(bào)系列比賽之社論學(xué)術(shù)活動(dòng)已經(jīng)拉開帷幕，優(yōu)秀的你還不快上車？ 有什么事情使你憤怒？ 你希...
AQA A Level Chemistry復(fù)習(xí)筆記8.1.1 Required Practical 7
Required Practical 7 Required Practical 7: Measuring the rate of a reaction There are two ways to measure the rate of reaction By an initial rate method By a continuous monitoring method &nb...
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.13.2 Standard Form - Harder
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.13.2 Standard Form - Harder Standard form – harder questions Make sure you are familiar with:Roots & Indices – Basics Standard Form – Basics Harder problems often ...
AQA A Level Chemistry復(fù)習(xí)筆記8.2.1 Required Practical 11
Required Practical 11 Required Practical 11: Carry out simple test-tube reactions to identify transition metal ions in aqueous solution This practical covers a number of key laboratory skill...
AQA A Level Chemistry復(fù)習(xí)筆記8.3.1 Required Practical 10a
Introduction to required practical 10a Required Practical 10a: Preparation of an organic solid and a test of its purity This practical covers a number of key laboratory skills use appropriat...
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.13.1 Standard Form - Basics
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.13.1 Standard Form - Basics What is standard form? Standard Form (sometimes called Standard Index Form) is a way of writing very big and very small numbers using power...
AQA A Level Chemistry復(fù)習(xí)筆記7.1.1 Optical Isomerism
Optical Isomerism Optical isomerism Stereoisomers?are molecules that have the same?structural formula?but have the atoms arranged differently in space There are two types of stereoisomerism ...
AQA A Level Chemistry復(fù)習(xí)筆記7.2.1 Aldehydes & Ketones
Oxidation of Aldehydes Aldehydes and ketones contain the carbonyl functional group, C=O This is why aldehydes and ketones are also known as carbonyls The difference between aldehydes and ket...
AQA A Level Chemistry復(fù)習(xí)筆記7.3.1 Carboxylic Acids
Carboxylic Acids Carboxylic acids Carboxylic acid?is the name given to the family of compounds that contain the?carboxyl?functional group,?-COOH The general formula of a carboxylic acid is?C...
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.12.2 Calculations using Bounds
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.12.2 Calculations using Bounds What are bounds? Bounds are the smallest – the?Lower Bound (LB)?– and largest – the?Upper Bound (UB)?– numbers that a?rounded?number can...
AQA A Level Chemistry復(fù)習(xí)筆記7.4.1 Structure of Benzene
Structure of Benzene In normal, everyday conversation the word 'aromatic' is used to refer to pleasant, fragrant smells However, in chemistry, it is used to describe molecules that contain o...
