If the Cosmological Constant Exists, What Physical Effect Is Believed

question 48

Multiple Choice

If the cosmological constant exists, what physical effect is believed to create it?

• A) New matter is constantly being created in the expanding voids between superclusters of galaxies, and the energy released by this creation accelerates the expansion of the universe.
• B) No one knows. The cosmological constant has been hypothesized to exist because astronomers see the universal expansion accelerating, but its source is still a mystery.
• C) Energy released by nuclear reactions in stars and then emitted into space is heating the universe and accelerating its expansion.
• D) Virtual particles that constantly appear and disappear add energy to empty space, and this vacuum energy provides a constant repulsive force that accelerates the universe.

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Definitions:

Units-Of-Activity

A method for allocating depreciation based on the actual usage, work, or units of production of the asset, rather than passage of time.

Residual Value

The approximate worth of an asset when it reaches the end of its usable life.

Depreciable Cost

This refers to the total cost of an asset that is subject to depreciation over its useful life, including the purchase price and any additional costs necessary to make the asset usable.

Journal Entry

A record of a transaction in the general journal, indicating the accounts and amounts to be debited and credited.