At What Time Did the Universe Cool to a Temperature

question 125

Multiple Choice

At what time did the universe cool to a temperature of about 3 K?

• A) the end of the inflationary era
• B) the end of the Planck time
• C) very recently
• D) the era of recombination

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Definitions:

Normal Distribution

A bell-shaped curve that represents the distribution of many types of data where most values cluster around a middle range and the rest taper off symmetrically.

Operational Definition

A clear and detailed description of how a research variable is measured or defined within the context of a study.

Hunger

The physical sensation of needing to eat, driven by the body's need for nutritional intake.

Random Sample

A subset of a statistical population in which each member of the subset has an equal probability of being chosen, ensuring the sample's representativeness of the whole population.