To demagnetize a saturated magnet, a certain magnetic field must be applied, and this threshold depends on coercivity of the respective material. Hard materials have high coercivity, whereas soft materials have low coercivity.aterials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some alloys of rare earth metals, and some naturally occurring minerals such as lodestone.
Atahualpa was the last Inca ruler, executed by Spanish conquistador Francisco Pizarro in 1533, marking the end of the Inca empire.orn c. 1502, Atahualpa was the younger son of Inca ruler Huayna Capac. At Huayna's death, the kingdom was divided between his sons. This lead to a bloody civil war, which Atahualpa won in 1532.
Noticing their lust for precious metals, Atahualpa offered to fill a large room about 22 feet (6.7 m) long and 17 feet (5.2 m) wide up to a height of 8 feet (2.4 m) once with gold and twice with silver within two months.e was given the name Francisco Atahualpa in honor of Francisco Pizarro. In accordance with his request, he was strangled with a garrote on 26 July 1533. Following his execution, his clothes and some of his skin were burned, and his remains were given a Christian burial.