fen

Of course it wouldn't. A polystrene ball is full of air. It's virtually equalised with the atmospheric pressure it's in. A titanium solid ball is exerting just about all of it's mass and density against the atmospheric pressure. swap the polysterene ball for aluminium no air still wouldn't weigh the same

You weigh nothing. Your dense body has no weight. Weight is a human measurement of dense objects under pressure. Your weight is dependent on the atmospheric pressure upon your body in a push on push fight that can be phsically seen on a scale, because your body is being pushed onto that scale by the 15psi your are in as your body pushes against that. according to this statement a solid titainium ball would weigh the same as a solid polysterene ball of the same size