Lever a place to stand, and I shall move the Earth with it' is a remark of Archimedes who formally stated the correct mathematical principle of levers (quoted by Pappus of Alexandria). It is assumed that in ancient Egypt, constructors used the lever to move and uplift obelisks weighing more than 100 tons. A lever is a beam connected to ground by a hinge, or pivot, called a fulcrum. The ideal lever does not dissipate or store energy, which means there is no friction in the hinge or bending in the beam. In this case, the power into the lever equals
The Prince Who Wanted to See the World She told him that the king was her father, and hated his father, which was why he had made the prince lose. When he arrived, the king gave him wheat, millet, and barley; he was to sow them, so that the king could have bread the next day. The prince summoned the dove, who sent him to bed. In the morning, he had the loaves of bread. Then the king ordered him to find the ring his oldest daughter had lost in the sea. The dove told him to take a basin and knife to the sea and set sail