In M82, Observations Indicate That There Are Several Bright Sources

question 45

Multiple Choice

In M82, observations indicate that there are several bright sources close to the center of the galaxy. These might be

• A) supernovae.
• B) accretion disks of supermassive black holes, millions of times as massive as our sun.
• C) accretion disks of intermediate black holes, hundreds of times as massive as our sun.
• D) accretion disks of stellar mass black holes.
• E) red giants in the process of forming planetary nebulae.

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Definitions:

Net Income

The profit of a company after all expenses, taxes, and costs have been deducted from total revenue, reflecting the actual earnings.

Sales Increase

The rise in the quantity or revenue of products sold by a company over a specific period.

Margin of Safety

The difference between actual or expected sales and sales at the break-even point, indicating how much sales can fall before a business incurs a loss.

Break-even Point

The level of sales at which profit is zero.