Which Kind of Stars Are the Major Source of Energy

question 46

Multiple Choice

Which kind of stars are the major source of energy for the heating of the dust clouds and the H II emission nebulae in the planes of the Milky Way and other galaxies?

• A) hot, young O and B stars, via their UV radiation
• B) numerous old red giant K and M stars, via their IR heat radiation
• C) very hot white dwarf stars, the remnants of planetary nebulae in the gas clouds
• D) many nova and supernova explosions of stars within the gas and dust clouds

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Definitions:

Realistic Job Preview

A recruiting tool that provides prospective employees a true picture of what working in a particular role or organization will entail, including both the positive and negative aspects.

Recruitment Process

The sequence of steps an organization undertakes to attract, select, and appoint suitable candidates for jobs.

Tight Labour Market

A job market characterized by few available workers relative to the number of jobs, often resulting in better employment terms for job seekers.