Which internal energy source produces heat by converting gravitational potential energy into thermal energy?

Accretion and Differentitaiton/ both A and B More test answers on https://studyhippo.com/astronomy-ch-9-31920/

The diagram above shows a planet at four positions in its orbit. At which position does it have the greatest gravitational potential energy?

Farthest from the sun More test answers on https://studyhippo.com/mastering-astronomy-chapter-4-2-33505/

The diagram above shows a planet at four positions in its orbit. At which position does it have the greatest total orbital energy? (Orbital energy is the sum of the planet’s kinetic and gravitational potential energy.)

The total orbital energy is the same at all four positions. More test answers on https://studyhippo.com/mastering-astronomy-chapter-4-2-33505/

Which of the following correctly describes how the process of gravitational contraction can make a star hot? A.Heat is generated when gravity contracts, because gravity is an inverse square law force. B.Gravitational contraction involves nuclear fusion, which generates a lot of heat. C.Gravitational contraction involves the generation of heat by chemical reactions, much like the burning of coal. D.When a star contracts in size, gravitational potential energy is converted to thermal energy.

D.When a star contracts in size, gravitational potential energy is converted to thermal energy. More test answers on https://studyhippo.com/astronomy-chapter-11/

3) 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.

Answer: B More test answers on https://studyhippo.com/astr-chapter-8-2-39661/

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.

B More test answers on https://studyhippo.com/astr-102-test-mc08-satf-39281/

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