aerodinàmica
The bicycle: a perfect machine
“Quèquicom” explains why the bicycle is a perfect machine. Consumes 40 times less than the car, and its manufacturing saves 100 times energy. It is also the fastest urban transport in distances of less than 8 km. And in addition, cycling is a healthy pleasure.
Resisting the North wind
The reporter Pere Renom travels to the Alt Empordà and lives the north wind. To directly experience both air friction and the force of gravity, he parachutes from 4000 meters, but can not fall above 200 km/h. The wind is the air in movement. How do resist the north wind the farmers and nature in […]