Question

out of a plastic ball cork and iron ball which will float in water and why

Answer 1

plastic ball will float because it has a lesser density that water

density of plastic= 0.92g/cm³ < 0.997g/cm³ =density of water

cork will float because it has a lesser density

density of cork =0.24 g/ cm³<0.997g/cm³ =density of water

iron ball will sink because it has a higher density

density of iron=7.874 g/cm3>0.997g/cm³ =density of water