Magnetic field created by a moving charged particle

How do forces originate? An interaction between two objects produces two equal and opposite forces, one to each object

Concept of inertial systems

The movement of the electrons inside an electrical conductor of oscillating form.

Concept of attraction among masses

The educational resource shows a visual about the apparent gravity: the gravitational field intensity, g, is not the same everywhere on the surface of the earth. If the period of the rotation were different, g would also be different.

This visual represents the tracks left by two cars when they move at a constant speed.

Concept of calculating speed (II)

Concept of electric attraction. Which explains the interactions among electric charges.

Concept of Crookes tube

Concept of gamma radiation

Faraday's experiment

Kepler used as his basis, both the results of his observations and those of his Astronomy professor, Tycho Brahe. You can study his three famous laws here.

The educational resource shows an interactive animation about the change of phase: solids melt when they are heated and liquids evaporate, changing to a gaseous state. If you increase the vibration of the molecules you can see how water changes phase.