If We Found a Star Cluster at the Edge of the Disk

question 90

Multiple Choice

If we found a star cluster at the edge of the disk of the Milky Way at a distance of 10 kpc from the center, and it orbited with a velocity of 250 km/s, what would be the total mass enclosed within this radius?

• A) 1.4 * 10¹¹ M_SUN
• B) 7.2 * 10¹¹ M_SUN
• C) 9.5* 10¹¹ M_SUN
• D) 4.2 * 10¹² M_SUN
• E) 8.0 *10¹² M_SUN

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Definitions:

Deficits

The amount by which a government, company, or individual's spending exceeds its income over a particular period of time.

Interest Rates

The cost of borrowing money or the return on investments, typically expressed as a percentage of the principal amount.

Investment

Spending on business capital, residential capital, and inventories

Short-Run Phillips

A concept in economics that illustrates an inverse relationship between the rate of unemployment and the rate of inflation over the short term.