AQA A Level Physics复习笔记6.1.2 Radians
Radians In circular motion, it is more convenient to measure angular displacement in units of radians rather than units of degrees The angular displacement (θ) of a body in circular motion i...
AQA A Level Physics复习笔记6.1.1 Circular Motion
Circular Motion Velocity and acceleration are both vector quantities An object in uniform circular motion has a constant linear speed However, it is continuously changing direction. Since ve...
IB DP Maths: AA HL复习笔记1.6.2 Extension of The Binomial Theorem
How do I use the binomial theorem for fractional and negative indices? How do we use the binomial theorem to estimate a value? The binomial expansion can be used to form an approximation for a valu...
AQA A Level Physics复习笔记5.4.2 Required Practical: Investigating EMF & Internal Resistance
Required Practical: Investigating EMF & Internal Resistance Aims of the Experiment The overall aim of the experiment is to investigate the relationship between e.m.f and internal resista...
AQA A Level Physics复习笔记5.4.1 Electromotive Force & Internal Resistance
Electromotive Force When charge passes through a power supply such as a battery, it gains electrical energy The electromotive force (e.m.f) is defined as: The amount of chemical energy conve...
AQA A Level Physics复习笔记5.3.4 Potential Divider Circuits
Potential Divider Circuit When two resistors are connected in series, through Kirchhoff’s Second Law, the potential difference across the power source is divided between them Potential divid...
IB DP Maths: AA HL复习笔记1.6.1 Binomial Theorem
Binomial Theorem What is the Binomial Theorem? The binomial theorem (sometimes known as the binomial expansion) gives a method for expanding a two-term expression in a bracket raised to a power A b...
AQA A Level Physics复习笔记5.3.3 Electrical Energy & Power
Energy & Power In mechanics, power P is defined as the rate of doing work The potential difference is the work done per unit charge Current is the rate of flow of charge Therefore...
IB DP Maths: AA HL复习笔记 1.5.2 Proof by Contradiction
What is proof by contradiction? Proof by contradiction is a way of proving a result is true by showing that the negation can not be true It is done by: Assuming the negation (opposite) of the resul...
