IB DP Maths: AA HL复习笔记4.4.2 Mean & Variance
Expected Values E(X) What does E(X) mean and how do I calculate E(X)? E(X) means the expected value or the mean of a random variable X The expected value does not need to be an obtainable value of ...
AQA A Level Physics复习笔记7.8.5 Circular Path of Particles
Motion of a Charged Particle in a Magnetic Field A charged particle in uniform magnetic field which is perpendicular to its direction of motion travels in a circular path This is because the...
AQA A Level Physics复习笔记7.8.4 Force on a Moving Charge
Calculating Magnetic Force on a Moving Charge The magnetic force on an isolating moving charged particle, such as an electron, is given by the equation: F = BQv Where: F = magnetic force on ...
AQA A Level Physics复习笔记7.8.3 Magnetic Flux Density
Magnetic Flux Density Definition The magnetic flux density B is defined as: The force acting per unit current per unit length on a current-carrying conductor placed perpendicular to the magn...
Edexcel IGCSE Chemistry 复习笔记 1.5.8 Empirical & Molecular Formulae
Edexcel IGCSE Chemistry 复习笔记 1.5.8 Empirical & Molecular Formulae Empirical & Molecular Formulae The molecular formula is the formula that shows the number and type of each atom ...
AQA A Level Physics复习笔记7.8.2 Fleming's Left Hand Rule
Fleming's Left Hand Rule The direction of the force on a charge moving in a magnetic field is determined by the direction of the magnetic field and the current Recall that the direction of t...
Edexcel IGCSE Chemistry 复习笔记 1.5.7 Practical: Determine the Formula of a Metal Oxide
Edexcel IGCSE Chemistry 复习笔记 1.5.7 Practical: Determine the Formula of a Metal Oxide Practical: Determine the Formula of Magnesium Oxide Aim: To determine the empirical formula of magnesium oxi...
AQA A Level Physics复习笔记7.8.1 Magnetic Force on a Current-Carrying Conductor
Magnetic Force on a Current-Carrying Conductor A current-carrying conductor produces its own magnetic field When interacting with an external magnetic field, it will experience a force  ...
IB DP Maths: AA HL复习笔记4.4.1 Discrete Probability Distributions
Discrete Probability Distributions What is a discrete random variable? A random variable is a variable whose value depends on the outcome of a random event The value of the random variable is not ...
Edexcel IGCSE Chemistry 复习笔记1.5.6 Experiment: Finding Formulae of Compounds
Edexcel IGCSE Chemistry 复习笔记1.5.6 Experiment: Finding Formulae of Compounds Formulae of Simple Compounds by Experiment Making Careful Quantitative Measurements The formulae of simple com...
AQA A Level Physics复习笔记7.7.4 Required Practical: Charging & Discharging Capacitors
Required Practical: Charging & Discharging Capacitors Aim of the Experiment The overall aim of this experiment is to calculate the capacitance of a capacitor. This is just one example of...
AQA A Level Physics复习笔记7.7.3 Charge & Discharge Equations
Capacitor Discharge Equation The time constant is used in the exponential decay equations for the current, charge or potential difference (p.d) for a capacitor discharging through a resistor...
