What are systems of linear equations? A linear equation is an equation of the first order (degree 1) This means that the maximum degree of each term is 1 These are examples of linear equations: 2x ...
Edexcel IGCSE Biology 复习笔记 2.10.11 The Endocrine System The Endocrine System Information is sent through the endocrine (hormonal) system as chemical substances known as hormones Hormones...
The Kelvin Scale & Absolute Zero On the thermodynamic (Kelvin) temperature scale, absolute zero is defined as: The lowest temperature possible. Equal to 0 K or -273.15 °C It is not possi...
How do I find the square root of a complex number? The square roots of a complex number will themselves be complex: How do I use de Moivre’s Theorem to find roots of a complex number? De Moivre’s T...
Latent Heat Capacity Energy is required to change the state of a substance Examples of changes of state are: Melting = solid to liquid Evaporation / vaporisation / boiling = liquid to gas Su...
Edexcel IGCSE Biology 复习笔记 2.10.10 Temperature Regulation The Role of Skin in Temperature Regulation The skin is our largest sense organ It contains many different receptors that enable us to d...
Specific Heat Capacity When a substance is heated, its temperature rises causing the particles within it to gain kinetic energy The amount of energy required to raise the temperature of a su...
Edexcel IGCSE Biology 复习笔记 2.10.9 The Human Eye The Human Eye: Structure The eye is a highly specialised sense organ containing receptor cells that allow us to detect the stimulus of lig...
What is De Moivre’s Theorem? De Moivre’s theorem can be used to find powers of complex numbers How do I use de Moivre’s Theorem to raise a complex number to a power? If a complex number is in Carte...
