In order for nuclear fusion to occur, atomic nuclei must overcome the ___

In order for nuclear fusion to occur, atomic nuclei must overcome the ____ by colliding violently.

a. coronal hole
b. radiative zone
c. convective zone
d. dynamo effect
e. Coulomb barrier

Question 2

The Hubble time only describes a Universe that is ____.

a. flat
b. totally open
c. totally closed
d. partially open
e. partially closed

Question 3

What is released from the proton-proton chain and is immediately absorbed by the surrounding gas, thereby heating it?

a. positrons
b. gamma rays
c. deuterium
d. electron motion
e. neutrinos

Question 4

Dark matter ____.

a. is homogenously distributed through the Universe
b. began clumping due to tiny variations in density at the moment of the big bang
c. began clumping due to large variations in the distribution of matter and antimatter
d. is isotropically distributed through the Universe
e. began clumping due to the variations in the distribution of baryonic matter

Question 5

Which equation represents the overall nuclear fusion process of the Sun?

a. 4H => 8He + energy
b. 2 1H => 1He + energy
c. 4 1H => 2 1He energy
d. 4 1H => 4He + energy
e. 4 4H => 4He energy

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In order for nuclear fusion to occur, atomic nuclei must overcome the ____ by colliding violently. ...

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