The Approximate Main-Sequence Lifetime of a Star of Spectral Type

question 64

Multiple Choice

The approximate main-sequence lifetime of a star of spectral type O is ________.

• A) 3 million years
• B) 10,000 years
• C) 300 million years
• D) 10 billion years

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Definitions:

Wheelchair

A wheelchair is a chair mounted on wheels, which is designed to be a means of transportation for a person who is unable to walk due to illness, injury, or disability.

Gait Belt

A device used to support and stabilize a person while walking or transferring from one position to another.

Quad-Base Cane

A walking aid with four feet at the base, designed to provide greater stability than a traditional single-point cane.

Stable Base

Providing a secure, steady foundation, often in the context of physical balance or structure.