Question

predicting buoyancy with density

metal	density (g/cm³)
cork	0.24
iron	7.50
lead	11.34
wax	0.72

if the density of water is 1.0 g/cm³, which of these materials would float in water, based on their densities? check all that apply.

☐ aluminum
☐ cork
☐ iron
☐ lead
☐ wax

Explanation:

Objects float in water when their density is less than the density of water ($1.0\ g/cm^{3}$). Cork has a density of $0.24\ g/cm^{3}$ and wax has a density of $0.72\ g/cm^{3}$, both less than $1.0\ g/cm^{3}$. Aluminum ($2.64\ g/cm^{3}$), iron ($7.50\ g/cm^{3}$), and lead ($11.34\ g/cm^{3}$) have densities greater than water's density.

Answer:

cork, wax