How Do We Know That at Least One Generation of Stars

question 18

Multiple Choice

How do we know that at least one generation of stars formed and died before the Milky Way's globular clusters formed?

• A) The stars of the oldest globular cluster have some heavy elements.
• B) They are so old that nuclear fusion in globular cluster stars has altered their chemical abundances.
• C) Globular clusters have a much higher hydrogen content than expected.
• D) The RR Lyrae stars found in globular clusters must be second-generation stars.
• E) All globular clusters reside in the disk of the Milky Way.

Understand the concept of significant digits for floating-point numbers and their representation.

Understand the equivalence of different forms of increment expressions.

Comprehend the concept of variable mutability during program execution.

Grasp the concept of implicit type coercion in Java.

---

Definitions:

Fluid

A substance that has no fixed shape and yields easily to external pressure; can be a gas or a liquid.

Genu Valgum

A condition characterized by an inward curvature of the legs, commonly known as "knock-knees."

Knock Knees

A condition where the knees angle in and touch when the legs are straightened, often noticeable when standing.

Genu Varum

A condition characterized by the outward bowing of the legs, commonly referred to as "bowlegs."