[填空题]
Two objects attract each othwlm9s qn uu4z8l3q7c:c s2poo zem+09er gravitationally with a force ogxp7otfyi;xy3 c35xk9f; v/ utt1pp *f 2.5$ \times 10^{-10} \mathrm{~N}$ when they are 0.25 m apart.
Their total mass is 4.0 kg . Find their individual masses. m$_1$ = m$_2$ =
