Hydrogen Lines Are Weak in the Spectra of Hot O-Type

question 59

Multiple Choice

Hydrogen lines are weak in the spectra of hot O-type stars because ____.

• A) most of the hydrogen has been converted to helium
• B) a good spectrum of these stars is difficult to obtain
• C) these stars have no atmosphere
• D) gravitational pressure pushes all the hydrogen lines out of the visible spectrum
• E) most of the hydrogen is ionized to high energy levels

Identify the macroeconomic variables that change during economic fluctuations and recessions.

Distinguish between short-run and long-run effects in the aggregate demand and aggregate supply model.

Interpret economic diagrams and models to analyze changes in the economy.

Understand the concepts of recession, depression, and the economic variables associated with them.

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Definitions:

Assumption

A belief or statement taken for granted without proof, often serving as a preliminary basis for reasoning and arguments.

Amygdala

A section of the brain's limbic system involved in emotion, particularly fear and pleasure, influencing behavior and decision-making.

Lateral Hypothalamus

An area of the brain thought to control hunger and thirst by regulating the release of various neurotransmitters and influencing eating behavior.

Frontal Lobe

The part of the brain located at the front of each cerebral hemisphere, involved in decision making, problem solving, and controlling behavior and emotions.