Na mgbakwunye na ịma mma na ịma mma, ọla ọla ọcha 925 nwere ọtụtụ uru: ngwaahịa ọlaọcha nwere ike ịmepụta oghere magnet n'ime ebe ụfọdụ, hapụ nnukwu ion ọlaọcha, na-akpali ume, ma nwee mmetụta nlekọta ahụike n'ahụ mmadụ.Ọlaọcha bụkwa ọla kachasị mma maka nyocha nsi, ahụ mmadụ na-ewepụta ụfọdụ "nsí" kwa ụbọchị, ọla ọlaọcha nwere ike ịmịnye "nsí" ndị a, nke bụkwa ihe mere ụfọdụ ndị ji eji ọla ọlaọcha mee ka ọ ghọọ oji.