What Is a "Hypervelocity" Star

question 69

Multiple Choice

What is a "hypervelocity" star?

• A) It is one of the stars in rapid orbital motion close to the supermassive black hole in the galactic center.
• B) A star moving faster than the escape speed from the galaxy.
• C) This is the name given to a few stars that have been detected moving around the galactic center in the opposite direction from the general galactic rotation. Although their speeds are not unusual, their speeds relative to normal stars are very large.
• D) These are stars that move around the galactic center in the middle of the galactic plane, but travel much faster than neighboring stars-seemingly in defiance of Kepler's third law.

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Definitions:

Acceptance Sampling

A statistical quality control method where a random sample of items is inspected to decide if the whole batch meets the prescribed standards.

AOQ

Average Order Quantity; the mean volume of goods ordered over a specific period of time, reflecting purchasing behavior.

Population Percent Defective

The percentage of items in a defined population that do not meet predefined standards or specifications.

Producer's Risk

The risk that a producer takes when a good batch is incorrectly rejected based on the sample quality test results, also known as Type I error in statistical testing.