Author Question: Based on the observed amount of deuterium in the universe, we can conclude that A) neutrons ... (Read 80 times)

kellyjaisingh · **on:** Jul 27, 2018

Based on the observed amount of deuterium in the universe, we can conclude that

A) neutrons outnumber protons 7 to 1 in the universe.
B) most of the deuterium that was created during the era of nucleosynthesis has since been destroyed.
C) we live in a critical-density universe.
D) the density of ordinary (baryonic) matter is about 5 percent of the critical density.
E) ordinary (baryonic) matter makes 75 percent of the mass of the universe.

Question 2

Which of the following statements about the sunspot cycle is not true?

A) The number of solar flares peaks about every 11 years.
B) The rate of nuclear fusion in the Sun peaks about every 11 years.
C) The number of sunspots peaks approximately every 11 years.
D) The magnetic polarity of the Sun reverses approximately every 11 years.
E) At solar minimum, the first sunspots form at mid-latitudes on the Sun.