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 复习笔记 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...
Edexcel IGCSE Physics 复习笔记 2.3.2 Calculating Energy Transfers Calculating Energy Transfers Work is done when charge flows through a circuit Work done is equal to the energy transferred &...
Edexcel IGCSE Physics 复习笔记 2.3.1 Electrical Power & Fuses Electrical Power Power is defined as The rate of energy transfer or the amount of energy transferred per second  ...
Sinusoidal Models What are the parameters of a sinusoidal model? A sinusoidal model is of the form The a represents the amplitude of the function The bigger the value of a the bigger the range of v...
Edexcel IGCSE Physics 复习笔记 2.2.5 Electrical Components Thermistors & LDRs Thermistors A thermistor is a temperature-dependent resistor It is represented by the following circuit symbol: The...
Edexcel IGCSE Physics 复习笔记 2.2.4 IV Graphs IV Graphs As the potential difference across a component is increased, the current also increases This is because potential difference and curr...
Direct Variation What is direct variation? The graphs of these models always start at the origin How do I solve direct variation problems? Worked Example b)Find the time it takes to order a list of...
Exponential Models What are the parameters of an exponential model? An exponential model is of the form Where e is the mathematical constant 2.718… The c represents the boundary for the function It...
