Ordinary matter makes up approximately ____percent of the critical density of the Universe. a. ...

Author Question: Ordinary matter makes up approximately ____percent of the critical density of the Universe. a. ... (Read 26 times)

TVarnum

Hero Member
Posts: 548

on: Jul 27, 2018

Ordinary matter makes up approximately ____percent of the critical density of the Universe.

a. 0.1
b. 1
c. 4.5
d. 10
e. 50

Question 2

How many nuclear reactions occur in a proton-proton chain?

a. two
b. three
c. one
d. four
e. five

al

Sr. Member
Posts: 344

Reply #1 on: Jul 27, 2018

Answer to Question 1

c

Answer to Question 2

b

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