Chapter 32, Problem 3TC

Rank the following in order of increasing density: Earth, Saturn, Pluto.

To determine

Ranking of the planets in increasing order of density.

Answer to Problem 3TC

The order of ranking of planets according to increasing density is Earth< Pluto< Saturn.

Explanation of Solution

The density of the planet depends on the mass and size of the planets. If the small size planet consists of a heavy mass, then the density of the planet becomes high.

The gravitational effect of the denser planet is greater than, the less dense planet. The inner planets are mostly made of rocks, so the densities of inner planets are greater than the outer planets.

The mass of the every planet is different. The density of the Earth is $5514\text{kg}/{\text{m}}^3$ , density of the Saturn is $687\text{kg}/{\text{m}}^3$ and density of the Pluto is $2095\text{kg}/{\text{m}}^3$ .

Conclusion:

Therefore, the order of ranking of planets according to increasing density is Earth<Pluto< Saturn.