Question

Which of the following objects would float when placed in water? (Note: 1 mL 1 cm+3)*

apple: density-0.7 g/m
gold: density 19.3 g/mL
iron: density-7.8 g/mL
rubber: density-1.2 g/mL

Answer 1

Only an apple will float when placed in water.

An object will float in water if its density is less than that of water (1.0 g/mL).

An object will sink in water if its density is greater than that of water.

Thus, solid objects made of gold, iron, or rubber will all sink in water.