Einstein's Equation for Rest Energy

Question

Rest energy of an object

{"title":"Work","description":"Correct","type":"correct","color":"#99CCFF","code":"[{\"shape\":\"rect\",\"coords\":\"67,26,120,76\"}]"} {"title":"Force","description":"Incorrect","type":"incorrect","color":"#993300","code":"[{\"shape\":\"rect\",\"coords\":\"165,30,201,72\"}]"} {"title":"Distance","description":"Incorrect","type":"incorrect","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"195,27,227,72\"}]"}

Question

Mass of the object

{"title":"Work","description":"Correct","type":"incorrect","color":"#99CCFF","code":"[{\"shape\":\"rect\",\"coords\":\"67,26,120,76\"}]"} {"title":"Force","description":"Incorrect","type":"correct","color":"#993300","code":"[{\"shape\":\"rect\",\"coords\":\"165,30,201,72\"}]"} {"title":"Distance","description":"Incorrect","type":"incorrect","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"195,27,227,72\"}]"}