Why Did the Solar Nebula Heat Up as It Collapsed

question 26

Multiple Choice

Why did the solar nebula heat up as it collapsed?

• A)Nuclear fusion occurring in the core of the protosun produced energy that heated the nebula.
• B)As the cloud shrank,its gravitational potential energy was converted to kinetic energy and then into thermal energy.
• C)Radiation from other nearby stars that had formed earlier heated the nebula.
• D)The shock wave from a nearby supernova heated the gas.
• E)Collisions among planetesimals generated friction and heat.

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Definitions:

Retained Earnings

The amount of net earnings left in the company after dividends are paid out to shareholders, used for investment or to pay off debt.