The density of matter (primarily hydrogen atoms) in intergalactic space is such that its contribution to the pressure is of the order of 23 a) what is the approtinate density of mate in amm') in intergalactic approximate density of matter (in atoms/m3) in intergalactic space? b) what is the ratio of the kinetic energy of matter to the energy of radiation in intergalactic space? (recall problems 3.6-1 and 3.6-2.) c) what is the ratio of the total matter energy (i. e., the sum of the kinetic energy plus the relativistic energy mc2) to the energy of radiation in intergalactic space?