ເຄື່ອງຄິດໄລ່ພະລັງງານມະຫາຊົນ Einstein Mass ດ້ວຍຄວາມໄວຂອງມະຫາຊົນຂອງແສງ I want to calculate Energy(E) Mass(m) Speed of Light in a Vacuum(c) Mass(m) = kg Speed of Light in a Vacuum(c) = m/s Energy(E) = J