Matsayi: Daidaitawa tsakanin taro da makamashi, kamar yadda aka bayyana ta hanyar dabara E = mc2, shine sanannen sanannen sakamako na ka'idar dangi na musamman. A cikin ka'idar dangi, taro da makamashi hanyoyi biyu ne daban-daban na bayyana girman jiki daya. Idan tsarin jiki yana da makamashi, shi ma yana da nauyin da ya dace, kuma akasin haka. Musamman, duk kaddarorin jiki waɗanda ke da alaƙa da makamashi, kamar zafin jiki ko haɗin tsarin makamashi kamar ƙwayoyin cuta ko kwayoyin, suna ba da gudummawa ga wannan jikin, sabili da haka suna aiki a matsayin tushen nauyi. A cikin ka'idar dangi na musamman, makamashi yana da alaƙa da ƙarfi. Kamar yadda sarari da lokaci suke, a cikin wannan ka'idar, bangarori daban-daban na wani abu mai mahimmanci da ake kira, sararin samaniya, makamashi da makamashi sune kawai bangarori daban-daban na haɗin kai, nau'i huɗu waɗanda masana kimiyyar lissafi ke kira hudu-nau'i. A cikin ka'idar dangi, taro da makamashi hanyoyi
taro, makamashi, lokacin motsawa, matsin lamba da tashin hankali