AQA A Level Maths: Pure復習筆記4.1.1 Binomial Expansion
Binomial Expansion What is the binomial expansion? Look at the pattern Start at?nC0, then?nC1,?nC2, etc Powers of?a?start at?n?and decrease by 1 Powers of?b?start at 0 and increase by...
AQA A Level Maths: Pure復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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...
