peachfish554Lv1
5 Dec 2021
Problem 1a
Page 983
Section: Search and Learn
Chapter 33: Astrophysics and Cosmology
Textbook ExpertVerified Tutor
5 Dec 2021
Given information
Assume the neutrino density is, like photons, about times that of nucleons
Step-by-step explanation
Step 1.
We know that critical density is . Since the nucleons make up by 2% of critical density.
Then nucleon mass density= 2% of
So nucleon number density=
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