Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Kupfuura: Einstein (1906) akaratidza kuti inertia yesimba (mass-energy-equivalence) chinhu chinodikanwa uye chakakwana chekuchengetedza kwepakati pezvinyorwa. Panguva iyoyo, akacherechedza kuti zviri pamutemo zvemasvomhu zvepepa raPoincaré pamusoro penzvimbo yehuremu (1900b) uye pepa rake chairo zvaive zvakafanana, kunyangwe kududzirwa kwepanyama kwaive kwakasiyana muchiedza chehukama.Kurd von Mosengeil (1906) nekuwedzera kuverenga kwaHasenöhrl kwechitema-muviri-mwenje mune gomba, akawana chirevo chakafanana chehuremu hwakawedzerwa hwemuviri nekuda kwemagetsi emagetsi seHasenöhrl. Pfungwa yaHasenöhrl yakanga iri yokuti uremu hwemitumbi hwaibatanidza mupiro unobva mumunda wemagetsi, akafungidzira muviri sechikamu chine chiedza. Ukama hwake pakati pemasasa nesimba, kufanana nemamwe ose aEinstein asati avapo, hwaiva nechinhu chisina kururama (ona Electromagnetic mass). Pakupedzisira Planck (1907) akawana kuenzana kwehuremu-simba-simba mukati mehurongwa hwehukama hwakakosha, kusanganisira masimba anosunga mukati menyaya. Akabvuma kukosha kwebasa raEinstein ra1905 pamusoro  Mubvunzo: Einstein akabudisa pfungwa dzake dzokuchengetedzwa kwezvizhinji mugore ripi?
Muna 1906