← Back to Training
MCQAdvancedCosmology & the Early Universe
USAAAO — 2021 First Round
Question 26
Let's imagine that our Universe would be filled with basketballs, each having a mass of mb = 0.62 kg. What would be the necessary numerical density (nb) of basketballs in the Universe such that the mass density of the basketballs would equal the current critical density of our Universe?
Sign in to save your progress.
Source
USAAAO 2021 First Round. Question text, choices, and answer were transcribed from the official USAAAO exam and solutions PDFs.