How to calculate the speed of rotation of the Earth?
v = 2 * pi * cos(L) * R / t
- A: Radius of Earth in km (6378)
- L: Latitude of the point in degrees
- t: Time in days.
- v: Speed in km / day.
Indeed, the principle of RPM is to perform as many laps as possible on an indoor bike in order to have better physical performance. In addition, it is an excellent cardio exercise to work on endurance and to strengthen the leg muscles.
The term RPM stands for ”Round Per Minute”, which amounts to the expression ”tour à la minute” in French and it is this aspect that demonstrates the originality of this sport. Indeed, the principle of RPM is to perform a maximum of turns on an indoor bike in order to have a better physical performance.
During their preparation, certain raw materials make it possible to obtain a paste which becomes naturally fluid, for example in the crushing of olives or the crushing of cocoa. Often referred to as the “oldest of industries”, the use of the grinding stone is inseparable from human history.
We then speak of the “transplanting” or “redressing” of the millstones, their periodic “ragres” or even “beating” or “rebeating” the mill. “The millers are required to lift the stone every eight days to beat it with a pointed hammer, which causes the mill to rest every eight days.”