AQA A Level Maths: Pure复习笔记3.2.5 Radius & Tangent
Radius & Tangent What is the relationship between tangents and radii? A tangent is a line that touches a circle at a single point but doesn't cut across the circle A tangent to a circle ...
AQA A Level Maths: Pure复习笔记3.2.4 Angle in a Semicircle
Angle in a Semicircle What is the angle in a semicircle property? It is always possible to draw a unique circle through the three vertices of a triangle – this is called the circumcircle of ...
IB DP Physics: HL复习笔记7.2.1 Atomic Mass Unit
Atomic Mass Unit The unified atomic mass unit u is roughly equal to the mass of one proton or neutron: 1u = 1.66 × 10−27 kg It is sometimes abbreviated to a.m.u This value will be given on your dat...
AQA A Level Maths: Pure复习笔记3.2.3 Bisection of Chords
Bisection of Chords How can I find the equation of a perpendicular bisector? The perpendicular bisector of a line segment: is perpendicular to the line segment goes through the midpoint of t...
IB DP Physics: HL复习笔记7.1.9 Investigating Half-Life
Investigating Half-Life Aim of the Experiment The aim of the experiment is to investigate the half-life of a decaying radioactive sample This can be done with a live sample if safe access is availa...
AQA A Level Maths: Pure复习笔记3.2.2 Finding the Centre & Radius
Finding the Centre & Radius How can I find the centre and radius from any form of the equation of a circle? A circle equation in a different form can always be rearranged into (x- a)2 + ...
IB DP Physics: HL复习笔记7.1.8 Half-Life
Half-Life It is impossible to know when a particular unstable nucleus will decay But the rate at which the activity of a sample decreases can be known This is known as the half-life Half-life is de...
IB DP Physics: HL复习笔记7.1.7 Decay Equations
Decay Equations Changes in N and Z by Radioactive Decay There are four reasons why a nucleus might become unstable, and these determine which decay mode will occur Decays through beta-minus (β-) em...
AQA A Level Maths: Pure复习笔记3.2.1 Equation of a Circle
Equation of a Circle What do I need to know about the equation of a circle? A circle with centre (a, b) and radius r has the equation You need to be able to find the centre and radius of a ...
