A solid will float in a liquid if it is less dense that then liquid, and sink if it is more/dense than the liquid. If the density of the seawater is 1.025g/mL, which type of plastics would definitely float in seawater?

A solid will float in a liquid if it is less dense that then liquid and sink if it is moredense than the liquid If the density of the seawater is 1025gmL which class=