>>38006181It's kind of a difficult question to answer as you've phrased it. How does one "blow up" the core of a planet to begin with? Not that it isn't possible, but that the mechanism by which this occurs, the physics of how that much energy gets into a core will change the answer a lot. To do it Dragonball style, you have to assume some fairly magical properties involved in the energy delivery (beam, ball, whatever), and then you have to pick some point at which you say "Okay from here let's turn off the magic, and start interpreting this ball/beam as an actual collection of insanely energetic particles" and start doing the "real" physical explanation from that point.
So there's no one answer, but the most simplistic version... I guess would be to assume either that (a) all of the particles in an existing (metallic) planetary core suddenly gain an insane amount of energy or (b) that some point-source of insanely high energy suddenly comes into existence in the center of the core.
Even with that simple assumption (which skips over how the insane amounts energy penetrated into the core), depending on your choice of "insane energy" there could be different effects. For example, some energy levels might just cause immediate rolling seismic activity, volcanic discharge of inner layers, but not enough energy for the entire mass of the planet to eject into space. Instead you "just" the up with the planet churning itself into a ball of magma over the course of a few hours.
But make different choices about the assumptions and you get different answers.
