Pendulum plane of oscillation of a pendulum, like a gyroscope, tends to stay constant regardless of the motion of the pivot, and that this could be used to demonstrate the rotation of the Earth. He suspended a pendulum free to swing in two dimensions (later named the Foucault pendulum) from the dome of the Panthéon in Paris. The length of the cord was . Once the pendulum was set in motion, the plane of swing was observed to precess or rotate 360° clockwise in about 32 hours. This was the first demonstration of the Earth's rotation that didn't depend on celestial
Which Witch of 142 times in concert version in the following countries: Norway, Canada, USA, the Netherlands, England, Spain, Finland, Sweden and Denmark. The total attendance figure is approx. 276,000. Total record sales are in excess of 110,000 units. Licensed productions have been staged in several European countries. Which Witch Which Witch is a musical written by Norwegian singers/composers Benedicte Adrian and Ingrid Bjørnov. The storyline for "Which Witch" was derived from the witch finder's manual "Malleus Maleficarum", and the original script was written by Adrian and Bjørnov's manager Ole A. Sørli. The lyrics of the early concert versions were written by