Within the First Second After the Big Bang, the Universe

question 109

Multiple Choice

Within the first second after the Big Bang, the universe was filled with high-energy, gamma-ray photons. These photons created huge numbers of elementary particles and their antiparticles through pair production. What happened to these particles?

• A) They are still here. They combined to create the first atoms and molecules that compose the physical universe.
• B) The particles are still here as atoms and molecules, but almost all of the antiparticles disappeared.
• C) The antiparticles annihilated with normal matter particles to produce more photons.
• D) This pair production was followed by the era of cosmic inflation, during which these particles spread out to produce the matter densities that astronomers see today.

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Definitions:

Collections

The process of recovering the amounts owed to a business by its debtors or the action of receiving payments.

Accounts Receivable Balance

The total amount of money owed to a company by its customers for goods or services delivered or used but not yet paid for.

Raw Materials Inventory

Stocks of unprocessed goods or materials held by a company to be used in production.

Raw Materials Production Needs

The quantity and type of raw materials required to meet the production goals of a manufacturing entity.