For good the knowledge you can use in the world! But you should be careful how the power you use. Anger, fear, aggressiveness - they are the dark sides of power. They can easily take possession of you. Wars do not make anyone big.
Here the plate capacitor is simply explained. With the help of the capacitor you will learn about the electric voltage, electric field and electric capacitance and how to calculate them for a plate capacitor.
Here you will learn the basics of differential equations (DGL), what types there are (ordinary, partial, linear, homogeneous) and 4 solving methods (separation of variables, variation of constants, exponential and separation ansatz).