Which Statement CORRECTLY Describes the Rotation of the Milky Way

question 443

Multiple Choice

Which statement CORRECTLY describes the rotation of the Milky Way Galaxy?

• A) The disk rotates like a solid object (objects at all distances take the same time to complete an orbit), and the halo objects have random orbits with no net rotation of the halo about the center of the Galaxy.
• B) Objects in the disk have random orbits with no net rotation of the disk about the center of the Galaxy, and the halo rotates differentially (objects farther from the center take longer to complete an orbit than objects closer to the center).
• C) The disk rotates differentially (objects farther from the center take longer to complete an orbit than objects closer to the center), and the halo rotates differentially (objects farther from the center take longer to complete an orbit than objects closer to the center).
• D) The disk rotates differentially (objects farther from the center take longer to complete an orbit than do objects closer to the center), and the halo objects have random orbits with no net rotation of the halo about the center of the Galaxy.

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Definitions:

Time

A dimension in which events can be ordered from the past through the present into the future.

Contribution Margin

The amount by which a product's sales price exceeds its variable costs, contributing towards covering fixed costs and generating profit.

Financial Break-even

The point at which total revenues equal total costs, resulting in no profit or loss for the business.

Financial Break-even

The point at which total revenues are equal to total operating expenses and financial costs, meaning the company makes no profit but also incurs no loss.