When a Variable Star Periodically Changes Its Luminosity, Many of Its

question 24

Multiple Choice

When a variable star periodically changes its luminosity, many of its properties also change. Which of these does NOT change?

• A) temperature
• B) radial surface speed
• C) size
• D) rotation rate

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Definitions:

Phalanx

In anatomy, a phalanx is one of the bones in the fingers or toes, playing a crucial role in the mobility and function of the hands and feet.

Sarcomere

A sarcomere is the fundamental unit of muscle contraction, consisting of repeating segments of actin and myosin filaments in striated muscle fibers.

Myofibril

A basic rod-like unit of a muscle cell, consisting of filaments that slide to contract and produce movement.

Muscle Fiber

A single, elongated muscle cell that contracts to produce movement.