Which Important Component Does a Planetary Nebula Contribute to the Interstellar

question 168

Multiple Choice

Which important component does a planetary nebula contribute to the interstellar medium?

• A) molecules such as NH₃ and CH₄, which contribute to giant molecular clouds
• B) UV light that photoionizes hydrogen. The hydrogen, on recombination, produces the red Balmer α light by which we see interstellar emission nebulae.
• C) rotational motion from the original star, which serves to concentrate interstellar matter into new stars and planetary systems
• D) nuclei of moderately heavy elements, major components of planets such as our own

---

Definitions:

Franchisor

An entity or individual that grants another party the right to conduct business under their trademark or trade name in exchange for a franchisee fee and a percentage of franchise operation sales.

Franchisee

An individual or company that is granted the license to do business under the franchisor's trademark, brand, and business model.

Capital Costs

Expenses incurred to create, purchase, or improve fixed assets such as buildings, machinery, and equipment, considered long-term investments.

Return on Marketing Investment

A measure used to evaluate the efficiency and profitability of investment in marketing, calculated by dividing the profit generated from marketing by the cost of the marketing efforts.