Why Do Flat Disks Form Around Young Stars

question 6

Multiple Choice

Why do flat disks form around young stars?

• A)They don't; the stars form from the disks.
• B)Centrifugal force pushes gas outward from the spinning gas cloud.
• C)Intense winds from nearby massive stars flatten the gas cloud.
• D)Collisions between rotating gas particles flatten the gas cloud along the axis of rotation.

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Definitions:

Marginal Product

The extra production generated when one more unit of a particular input is added, with all other inputs remaining unchanged.

Law of Diminishing Returns

An economic principle stating that as investment in a particular area increases, the rate of profit from that investment, after a certain point, cannot continue to increase if other variables remain constant.

Extra Output

The additional production that is generated as a result of adding more of a variable input, such as labor or capital.

Diminishing Returns

A principle stating that as additional amounts of a variable input are added to a fixed input, beyond some point the marginal product of the variable input begins to decrease.