Compound lever sudden movement of the key. The earliest remaining writings regarding levers date from the 3rd century BC and were provided by Archimedes. ""Give me a place to stand, and I shall move the earth with a lever"" is a remark attributed to Archimedes, who formally stated the correct mathematical principle of levers (quoted by Pappus of Alexandria). The idea of the compound lever is attributed to the Birmingham inventor John Wyatt in 1743, when he designed a weighing machine that used four compound levers to transfer a load from a weighing platform to a central lever from which the weight
Make the World Move Make the World Move "Make the World Move" is a song recorded by American singer Christina Aguilera for her seventh studio album, "Lotus" (2012). It features guest vocals from Cee Lo Green. The song was written by Alexander Grant, Mike Del Rio, Candice Pillay, Jayson DeZuzio, Dwayne Abernathy and Armando Trovajoli. Musically, the track is an up–tempo inspirational song, which combines dance, R&B and soul genres. Lyrically, it is a positive attitude song which features horns and synthesizers as part of its instrumentation. "Make the World Move" received a mixed response from music critics; some were complimentary of Aguilera and