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.
Offended by the wasting of the chicha, Atahualpa threw the letter or whatever it was on the ground, telling them to leave. On November 16, Atahualpa arrived at Cajamarca with no weapons for battle or harnesses for defense, although they did carry tomes (knives) and lassos for hunting llamas. The Spanish approached and told Atahualpa that Virococha had ordered them to tell the Inca who they were.