## Differential Equations (DEQ): All the Basics Everyone Should Know

Learn what differential equations are, what types there are (ordinary, partial, linear, homogeneous), and what boundary and initial conditions are good for.

Learn what differential equations are, what types there are (ordinary, partial, linear, homogeneous), and what boundary and initial conditions are good for.

In this lesson you will learn the basics of the electric current, i.e. the definition, its physical meaning and unit.

List of important physical quantities, their symbols, (derived) units and examples with images.

Here all important formulas for the horizontal throw are derived and discussed, e.g. throw distance and throw time.

Here you will learn how to determine energy of photons and how this energy depends on the color of light (frequency or wavelength).

Here you will learn how an electrical circuit works and how to apply Ohm's Law to it. You will also learn about parallel and series circuits and their difference.

Illustrated overview of all geometric solids with important properties as well as formulas for areas, volumes and other quantities.

Here you will learn how the photoelectric effect is explained quantum mechanically, how the stopping voltage method works and everything else you need to know.

Learn about important physical constants and what their formula symbols and SI units are.

In this lesson you will learn about the time-dependent and independent Schrödinger equation (1d, 3d), how it is derived and what you can do with it.