From the inner core to the surface the Earth temperature decreases. This induces convection movements in the Earth’s mantle. The warmer magma moves closer to the surface where it cools down. It...
Telecommunications, navigation, meterorology, etc., but also cell phones, GPS, Internet, provide numerous reasons to install satellites orbiting around the Earth. For...
The study of the diffusion of liquids in the soil, also called percolation, allows scientists measuring how water is diffused in the soil, how fast aquifers refill, and to understanding the...
Have you already tried to reach a target when you are moving to the right? You need to aim at the left of the target if you wish to reach it. Same thing if the target is moving slower than you....
Solitons are solitary waves observed for the first time by the Scottish mathematician and engineer J. S. Russell in 1834. Solitons travel...
How many satellites orbiting around the Earth are needed to compute exactly one’s position at each instant?
The GPS system uses a set of satellites (at least 24)...