Edexcel IGCSE Physics 復(fù)習(xí)筆記 2.3.5 AC & DC
Edexcel IGCSE Physics 復(fù)習(xí)筆記 2.3.5 AC & DC AC & DC Direct Current A direct current (d.c.) is defined as A current that is steady, constantly flowing in the same direction in...
IB DP Maths: AI SL復(fù)習(xí)筆記3.3.1 Pythagoras & Right-Angled Triganometry
Pythagoras What is the Pythagorean theorem? Pythagoras’ theorem is a formula that works for?right-angled triangles?only It states that for any right-angled triangle, the?square of the hypotenuse is...
IB DP Maths: AI SL復(fù)習(xí)筆記3.2.2 Volume & Surface Area
Volume of 3D Shapes What is volume? The volume of a 3D shape is a measure of how much 3D space it takes up A 3D shape is also called a?solid You need to be able to calculate the volume of a number ...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 2.3.4 Electricity & Heat
Edexcel IGCSE Physics 復(fù)習(xí)筆記 2.3.4 Electricity & Heat Electricity & Heat When electricity passes through a component, such as a resistor, some of the electrical energy is turned in...
IB DP Maths: AI SL復(fù)習(xí)筆記3.2.1 3D Coordinate Geometry
3D Coordinate Geometry How does the 3D coordinate system work? In three-dimensional space we can label where any object is using the?x-y-z?coordinate system In the 3D cartesian system, the?x-?and?y...
IB DP Maths: AI SL復(fù)習(xí)筆記3.1.2 Arcs & Sectors
Length of an Arc What is an arc? An arc is a part of the?circumference?of a circle It is easiest to think of it as the crust of a single slice of pizza The length of an arc depends of the size of t...
IB DP Maths: AI SL復(fù)習(xí)筆記3.1.1 Coordinate Geometry
Basic Coordinate Geometry What are cartesian coordinates? Cartesian?coordinates are basically the?x-y?coordinate system They allow us to label where things are in a two-dimensional plane In the 2D ...
IB DP Maths: AI SL復(fù)習(xí)筆記2.3.6 Strategy for Modelling Functions
Modelling with Functions What is a mathematical model? A?mathematical model?simplifies a real-world situation so it can be described using mathematics The model can then be used to make predictions...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 2.3.3 Electrical Safety
Edexcel IGCSE Physics 復(fù)習(xí)筆記 2.3.3 Electrical Safety Electrical Safety Mains electricity is potentially lethal Potential differences as small as 50 V can pose a serious hazard to individua...
