What Behaviour of Galactic Rotation Curves Suggests the Existence of Dark

question 37

Multiple Choice

What behaviour of galactic rotation curves suggests the existence of dark matter in an extended halo?

• A)Small velocities are seen at large distances from the galactic centre.
• B)Small velocities are seen at distances close to the galactic centre.
• C)Large velocities are seen at large distances from the galactic centre.
• D)Large velocities are seen at distances close to the galactic centre.

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Definitions:

Peaks

Points of maximum value or height in a distribution or dataset.

Interval Data

Data with meaningful amounts of difference between measurements but no true zero point, allowing for numerical operations like addition and subtraction.

Histograms

Graphical representations of data distribution where data is grouped into ranges and each range's frequency is represented by a column's height.

Positively Skewed

A positively skewed distribution is one where the tail on the right side of the distribution is longer or fatter than the left side, indicating that the mean and median are greater than the mode.