Est-ce que je suis en train de réaliser le plus idiot et trollesque des stickers antifa ?
....
Si l'accueil est positif, je finalise... si non bha... ça restera une joke !
After lunch yesterday, we went to the #HistoryOfScienceMuseum in #Oxford. It’s not very big but contains some really fascinating exhibits. It is right next to the #SheldonianTheatre and well worth a visit.
Yesterday, we went on a day trip to #Oxford by #train. No other means of powered transport was used as we #cycled to and from our local #RailwayStation.
Here is the #countryside zooming past the train window.
A couple of weeks ago, I posted an #animation of a point on a circle generating a #cycloid.
If you turn the curve "upside down", you get the #BrachistochroneCurve. This curve provides the shortest travel time starting from one cusp to any other point on the curve for a ball rolling under uniform #gravity. It is always faster than the straight-line travel time.
Imagine a circular wheel rolling, without skidding, on a flat, horizontal surface. The #locus of any given point on its #circumference is called a #cycloid. It is a #periodic#curve with #period over the #circle's circumference and has #cusps whenever the point is in contact with the surface (the two sides of the curve are tangentially vertical at that point).