IB DP Maths: AA HL复习笔记1.1.3 Partial Fractions
What are partial fractions? Partial fractions allow us to simplify rational expressions into the sum of two or more fractions with constant numerators and linear denominators This allows for integr...
IB DP Maths: AA HL复习笔记1.1.2 Laws of Indices
What are the laws of indices? Laws of indices (or index laws) allow you to simplify and manipulate expressions involving exponents An exponent is a power that a number (called the base) is raised t...
IB DP Maths: AA HL复习笔记1.1.1 Standard Form
Standard form (sometimes called scientific notation or standard index form) gives us a way of writing very big and very small numbers using powers of 10. Standard Form Why use standard form? Some n...
AQA A Level Physics复习笔记4.7.1 Density
Density Density is the mass per unit volume of an object Objects made from low-density materials typically have a lower mass For example, a balloon is less dense than a small bar of lead des...
AQA A Level Physics复习笔记4.6.5 Kinetic & Gravitational Potential Energy
Kinetic & Gravitational Potential Energy Kinetic Energy Kinetic energy is the energy an object has due to its motion (or velocity) The faster an object is moving, the greater its kinetic...
AQA A Level Physics复习笔记4.6.4 Conservation of Energy
The Principle of Conservation of Energy The Principle of Conservation of Energy states that: Energy cannot be created or destroyed, it can only be transferred from one form to another This m...
AQA A Level Physics复习笔记4.6.3 Efficiency
Efficiency The efficiency of a system is a measure of how well energy is transferred in a system Efficiency is defined as the ratio of the useful power output from a system to its total powe...
AQA A Level Physics复习笔记4.6.2 Area Under a Force-Displacement Graph
Area Under a Force-Displacement Graph The work done can also be found from a force-displacement graph If the force is not constant and is plotted against the displacement of the object: The ...
AQA A Level Physics复习笔记4.6.1 Work & Power
Work & Power Work is defined as The amount of energy transferred when an external force causes an object to move over a certain distance If the force is parallel to the direction of the ...
