Which two quantities need to be measured in order to determine the density of a planet?
A)mass
B)atmospheric composition
C)radius
D)A and B
E)A and C

Question

Quizplus · Accepted Answer

Density is calculated by dividing mass by volume. The mass of a planet can be estimated from its gravitation effect on nearby objects, and the radius can be measured from observations of the planet's size. Therefore, measuring mass and radius are the two quantities required to determine the density of a planet.

Which Two Quantities Need to Be Measured in Order to Determine