Cepheid and RR Lyrae Variable Stars Change Their Brightness by ____

question 21

Multiple Choice

Cepheid and RR Lyrae variable stars change their brightness by ____.

• A) atmospheric explosions of hydrogen gas
• B) internal changes in their fusion processes
• C) a combination of atmospheric explosions and internal changes
• D) a combination of atmospheric explosions and physically pulsating
• E) changing its period between pulses

---

Definitions:

Stakeholder Responsibility

Involves the obligations and duties that an organization has towards its stakeholders, including customers, employees, investors, and the wider community, to act ethically and contribute to well-being.

Profit Responsibility

The obligation or duty of a company to maximize profits for its shareholders or owners, while maintaining ethical practices.

Mass Marketing

A marketing strategy that aims to reach a wide audience through broad communication channels and generic messages.

Corn-Based Resins

Bioplastic materials derived from corn starch, used as an environmentally friendly alternative to petroleum-based plastics for various applications.